# List of American Civil War generals (Union)
## Union generals

The following list shows the names of substantive, full grade general officers (Regular U.S. Army or U.S. Volunteers) effectively appointed, nominated, confirmed and commissioned (by signed and sealed document) who served in the Union Army during the American Civil War. Many commissions were antedated. Dates of rank were assigned for seniority purposes. Because of this, such "ranks" could be dated before the actual appointment, leading to confusion in some sources as to the actual effective date of the commission. This list currently shows the date of rank as the date of the promotion rather than the date of commission.
Officers receiving only brevet general appointments should be on the List of American Civil War brevet generals (Union) and not on this list. Brevet appointments went through the same process of appointment, nomination, confirmation and commission as the substantive grade officers. If a full grade brigadier general received a later brevet major general appointment, that appointment also may be placed in the notes on this list.
All but 58 brevet general appointments were made postwar but, just as many regular substantive grade appointments were backdated, many of the brevet grade appointments were backdated, mostly "to rank from" March 13, 1865. President Abraham Lincoln signed only 58 brevet general commissions before his death on April 15, 1865. Eicher notes that the odd order of grade (commission) date and rank date is especially present for brevet appointments which were actually issued mostly in 1866 to as late as 1869. Eicher also notes that most brevet appointments were backdated to March 13, 1865.
In addition to their names and grades, there is a small set of notes after every entry which may list Medal of Honor or Thanks of Congress citations, West Point graduation dates, important political or Army offices held, retirements or deaths during the war (whether in action or other means) and other unique facts pertaining to this article (i.e. youngest general, last surviving general, etc.). For all other information on their lives and accomplishments of these generals, please refer to their individual articles which have links from the list.
Note on abbreviations:
* MOH: Medal of Honor
* CSA: Confederate States Army
* DOW: Died of wounds
* GAR: Grand Army of the Republic
* KIA: Killed in action
* MOLLUS: Military Order of the Loyal Legion of the United States
* USA: United States Army (Regular Army) (appointment or brevet)
* USMA: United States Military Academy
* USN: United States Navy
* USV: United States Volunteers (appointment or brevet)
* VRC: Veteran Reserve Corps officer

### A

| Name | Substantive rank | Brevet rank | Notes |
| Abercrombie, John Joseph | Colonel, USA (February 25, 1861) Brigadier general, USV (August 31, 1861) | Brigadier general, USA (March 13, 1865) | USMA, 1822 Resigned June 24, 1865 |
| Allen, Robert | Colonel, USA (February 19, 1862) Brigadier general, USV (May 23, 1863) | Major general, USA (March 13, 1865) Major general, USV (March 13, 1865) | USMA, 1836 |
| Alvord, Benjamin | Major, USA (June 22, 1854) Brigadier general, USV (April 15, 1862) | Brigadier general, USA (April 9, 1865) | USMA, 1833 |
| Ames, Adelbert | Captain, USA (June 11, 1864) Brigadier general, USV (May 20, 1863) | Major general, USA (March 13, 1865) Major general, USV (January 15, 1865) | USMA, 1861 MOH, First Battle of Bull Run (July 21, 1861) Provisional Governor Mississippi (1868–1869) U.S. Senator from Mississippi (1870–1874) Governor of Mississippi (1875) Last surviving Union General of U.S. Regular Army, d. April 13, 1933 Son-in-law of Benjamin Franklin Butler |
| Ammen, Jacob | Brigadier general, USV (July 16, 1862) | | USMA, 1831 Resigned January 14, 1865 |
| Anderson, Robert | Brigadier general, USA (May 15, 1861) | Major general, USA (February 3, 1865) | USMA, 1825 Retired October 27, 1863 |
| Andrews, Christopher Columbus | Brigadier general, USV (January 5, 1864) | Major general, USV (March 9, 1865) | |
| Andrews, George Leonard | Brigadier general, USV (November 10, 1862) | Major general, USV (March 26, 1865) | USMA, 1851 Resigned, 1855 |
| Arnold, Lewis Golding | Lieutenant colonel, USA (August 1, 1863) Brigadier general, USV (January 24, 1862) | | USMA, 1837 Retired February 8, 1864 |
| Arnold, Richard | Captain, USA (May 14, 1861) Brigadier general, USV (November 29, 1862) | Major general, USA (March 13, 1865) Major general, USV (August 22, 1865) | USMA, 1850 |
| Asboth, Alexander Sandor | Brigadier general, USV (March 21, 1862) | Major general, USV (March 13, 1865) | Appointed brigadier general, USV (September 3, 1861) by John Charles Frémont who lacked the authority to make such an appointment United States Minister to Argentina and Uruguay (1866–1868) |
| Augur, Christopher Columbus | Lieutenant colonel, USA (July 1, 1863) Major general, USV (August 9, 1862) | Major general, USA (March 13, 1865) | USMA, 1843 |
| Averell, William Woods | Captain, USA (July 17, 1862) Brigadier general, USV (September 26, 1862) | Major general, USA (March 13, 1865) Major general, USV (August 7, 1864) | USMA, 1855 |
| Ayres, Romeyn Beck | Captain, USA (May 14, 1861) Brigadier general, USV (November 29, 1862) | Major general, USA (March 13, 1865) Major general, USV (August 1, 1864) | USMA, 1847 |

### B

| Name | Substantive Rank | Brevet Rank | Notes |
| Bailey, Joseph | Brigadier general, USV (November 10, 1864) | Major general, USV (March 13, 1865) | Received the Thanks of Congress (June 4, 1864) |
| Baird, Absalom | Major, USA (November 12, 1861) Brigadier general, USV (April 28, 1862) | Major general, USA (March 13, 1865) Major general, USV (September 1, 1864) | USMA, 1849 MOH, Battle of Jonesborough (September 1, 1864) |
| Baker, Edward Dickinson | Brig. Gen., USV (May 17, 1861) | | KIA, Battle of Ball's Bluff (October 21, 1861) Declined appointment as brigadier general, USV, nevertheless confirmed Nominated to major general, USV posthumously but not confirmed. U.S. Congressman from Illinois (1845–1846, 1849–1851) U.S. Senator from Oregon (1860–1861) |
| Banks, Nathaniel Prentiss | Major general, USV (May 16, 1861) | | Received the Thanks of Congress (January 28, 1864) U.S. Congressman from Massachusetts (1853–1857, 1865–1873, 1875–1879, 1889–1891) Speaker of the House (1856–1857) Governor of Massachusetts (1858–1861) |
| Barlow, Francis Channing | Major general, USV (May 25, 1865) | | |
| Barnard, John Gross | Colonel, USA (December 28, 1865) Brigadier general, USV (September 23, 1861) | Major general, USA (March 13, 1865) Major general, USV (July 4, 1864) | USMA, 1833 Superintendent, USMA (1855–1856) |
| Barnes, James | Brigadier general, USV (November 29, 1862) | Major general, USV (March 13, 1865) | |
| Barnes, Joseph K., M.D. | Brigadier general, USA (August 22, 1864) | Major general, USA (March 13, 1865) | Surgeon General (1864–1882) Surgeon at the deathbeds of Presidents Abraham Lincoln and James Abram Garfield |
| Barnum, Henry Alanson | Brigadier general, USV (May 31, 1865) | Major general, USV (March 13, 1865) | MOH, Battle of Lookout Mountain (November 24, 1863) |
| Barry, William Farquhar | Colonel, USA (December 11, 1865) Brigadier general, USV (August 20, 1861) | Major general, USA (March 13, 1865) Major general, USV (September 1, 1864) | USMA, 1838 |
| Bartlett, Joseph Jackson | Brigadier general, USV (March 30, 1863) | Major general, USV (August 1, 1864) | Original appointment as brigadier general, USV (October 4, 1862) expired March 4, 1863 U.S. minister to Sweden and Norway (1867–1869) |
| Bartlett, William Francis | Brigadier general, USV (June 20, 1864) | Major general, USV (March 13, 1865) | |
| Baxter, Henry | Brigadier general, USV (March 12, 1863) | Major general, USV (April 1, 1865) | U.S. minister to Honduras (1869–1873) |
| Bayard, George Dashiell | Captain, USA (August 20, 1861) Brigadier general, USV (April 28, 1862) | | USMA, 1856 DOW, Battle of Fredericksburg (w. December 13, 1862, d. December 14, 1862) |
| Beal, George Lafayette | Brigadier general, USV (November 30, 1864) | Major general, USV (March 13, 1865) | |
| Beatty, John | Brigadier general, USV (November 29, 1862) | | U.S. Congressman from Ohio (1868–1873) |
| Beatty, Samuel | Brigadier general, USV (November 29, 1862) | Major general, USV (March 13, 1863) | |
| Belknap, William Worth | Brigadier general, USV (July 30, 1864) | Major general, USV (March 13, 1865) | Secretary of War (1869–1876) |
| Benham, Henry Washington | Major (August 6, 1861) Brigadier general, USV (August 13, 1861) | Major general, USA (March 13, 1865) Major general, USV (March 13, 1865) | USMA, 1837 |
| Benton, William Plummer | Brigadier general, USV (April 28, 1862) | Major general, USV (March 26, 1865) | |
| Berry, Hiram Gregory | Major general, USV (November 29, 1862) | | KIA, Battle of Chancellorsville (May 3, 1863) |
| Bidwell, Daniel Davidson | Brigadier general, USV (August 11, 1864) | | KIA, Battle of Cedar Creek (October 19, 1864) |
| Birge, Henry Warner | Brigadier general, USV (September 19, 1863) | Major general, USV (February 25, 1865) | |
| Birney, David Bell | Major general, USV (May 20, 1863) | | Died of illness, October 18, 1864 Brother of William Birney |
| Birney, William | Brigadier general, USV (May 22, 1863) | Major general, USV (March 13, 1865) | Brother of David Bell Birney |
| Blair, Francis Preston Jr. | Major general, USV (November 29, 1862) | | Declined appointment as brigadier general, USV (August 7, 1861) U.S. Congressman from Missouri (1857–1859, 1861–1862, 1863–1864) U.S. Senator from Missouri (1871–1873) Brother of Postmaster General Montgomery Blair |
| Blenker, Louis (b. Blenker, Ludwig) | Brigadier general, USV (August 9, 1861) | | Mustered out March 31, 1863 |
| Blunt, James Gillpatrick | Major general, USV (March 16, 1863) | | |
| Bohlen, Henry | Brigadier general, USV (April 28, 1862) | | KIA in reconnaissance over the Rappahannock River, Virginia (August 22. 1862) |
| Bowen, James | Brigadier general, USV (October 11, 1862) | Major general, USV (March 13, 1865) | Resigned July 27, 1864 |
| Boyle, Jeremiah Tilford | Brigadier general, USV (November 9, 1861) | | Resigned January 26, 1864 |
| Bradley, Luther Prentice | Brigadier general, USV (June 30, 1864) | | |
| Bragg, Edward Stuyvesant | Brigadier general, USV (June 25, 1864) | | U.S. Congressman from Wisconsin (1877–1883, 1885–1887) U.S. minister to Mexico |
| Brannan, John Milton | Major, USA (August 1, 1863) Brigadier general, USV (September 28, 1861) | Major general, USA (March 13, 1865) Major general, USV (January 23, 1865) | USMA, 1841 |
| Brayman, Mason | Brigadier general, USV (September 24, 1862) | Major general, USV (March 13, 1865) | Territorial Governor of Idaho (1876–1880) |
| Briggs, Henry Shaw | Brigadier general, USV (July 17, 1862) | | |
| Brisbin, James Sanks | Captain, USA (August 5, 1861) Brigadier general, USV (May 1, 1865) | Colonel, USA (March 13, 1865) Major general, USV (March 13, 1865) | |
| Brooke, John Rutter | Brigadier general, USV (May 12, 1864) | Major general, USV (August 1, 1864) | Military Governor of Puerto Rico (1898) Military Governor of Cuba (1899) Commander-in-chief, MOLLUS (1905–1907) |
| Brooks, William Thomas Harbaugh | Major, USA (March 12, 1862) Brigadier general, USV (September 28, 1861) | | USMA, 1841 Appointment as major general, USV (June 10, 1863) revoked April 6, 1864 Resigned June 14, 1864 |
| Brown, Egbert Benson | Brigadier general, USV (November 29, 1862) | | |
| Buchanan, Robert Christie | Colonel, USA (February 8, 1864) Brigadier general, USV (November 29, 1862) temporary appt. expired | Major general, USA (March 13, 1865) | USMA, 1830 Temporary volunteer brig. gen. appointment expired March 4, 1863 Nephew of First Lady Louisa Adams (Wife of President John Quincy Adams) |
| Buckingham, Catharinus Putnam | Brigadier general, USV (July 16, 1862) | | USMA, 1829 Resigned February 11, 1863 |
| Buckland, Ralph Pomeroy | Brigadier general, USV (November 29, 1862) | Major general, USV (March 13, 1865) | Resigned January 6, 1865 U.S. Congressman from Ohio (1865–1869) |
| Buell, Don Carlos | Colonel, USA (July 17, 1862) Major general, USV (March 21, 1862) | | USMA, 1841 Mustered out of volunteer service May 28, 1864 Resigned June 1, 1864 |
| Buford, John | Captain, USA (November 12, 1861) Major general, USV (July 1, 1863) | | USMA, 1848 Died of illness December 16, 1863 Half-brother of Napoleon Bonaparte Buford |
| Buford, Napoleon Bonaparte | Brigadier general, USV (April 15, 1862) | Major general, USV (March 13, 1865) | USMA, 1827 Appointment as major general, USV (November 29, 1862) expired March 4, 1863 Half-brother of John Buford |
| Burbridge, Stephen Gano | Brigadier general, USV (June 9, 1862) | Major general, USV (July 4, 1864) | |
| Burnham, Hiram | Brigadier general, USV (April 26, 1864) | | KIA, Battle of Chaffin's Farm (September 29, 1864) |
| Burns, William Wallace | Major, USA (August 3, 1861) Brigadier general, USV (September 28, 1861) | Brigadier general, USA (March 13, 1865) | USMA, 1847 Resigned volunteer commission March 20, 1863 |
| Burnside, Ambrose Everett | Major general, USV (March 18, 1862) | | USMA, 1847 Received the Thanks of Congress (January 28, 1864) Resigned April 15, 1865 Governor of Rhode Island (1866–1869) Commander-in-chief, GAR (1871–1873) U.S. Senator from Rhode Island (1875–1881) |
| Bussey, Cyrus | Brigadier general, USV (January 5, 1864) | Major general, USV (March 13, 1865) | |
| Busteed, Richard | Brigadier general, USV (August 7, 1862) | | Appointment expired March 4, 1863 |
| Butler, Benjamin Franklin | Major general, USV (May 16, 1863) | | U.S. Congressman from Massachusetts (1867–1875, 1877–1879) Governor of Massachusetts (1883–1884) Father-in-law of Adelbert Ames |
| Butterfield, Daniel | Colonel, USA (July 1, 1863) Major general, USV (November 29, 1862) | Major general, USA (March 13, 1865) | MOH, Battle of Gaines' Mill (June 27, 1862) |

### C

| Name | Substantive Rank | Brevet Rank | Notes |
| Cadwalader, George | Major general, USV (April 25, 1862) | | Resigned July 6, 1865 First commander-in-chief of MOLLUS (1865–1879) |
| Caldwell, John Curtis | Brigadier general, USV (April 28, 1862) | Major general, USV (August 19, 1865) | U.S. minister to Uruguay and Paraguay (1874–1882) |
| Cameron, Robert Alexander | Brigadier general, USV (August 11, 1863) | Major general, USV (March 13, 1865) | |
| Campbell, Charles Thomas | Brigadier general, USV (March 13, 1863) | | Original appointment as brigadier general, USV (November 29, 1862) expired March 4, 1863 |
| Campbell, William Bowen | Brigadier general, USV (June 30, 1862) | | Resigned January 26, 1863 U.S. Congressman from Tennessee (1847–1853) Governor of Tennessee (1851–1853) |
| Canby, Edward Richard Sprigg | Colonel, USA (May 14, 1861) Major general, USV (May 7, 1864) | Major general, USA (March 13, 1865) | USMA, 1839 Brother-in-law of John Parker Hawkins |
| Carleton, James Henry | Major, USA Brigadier general, USV (April 28, 1862) | Major general, USA (March 13, 1865) Major general, USV (March 13, 1865) | |
| Carlin, William Passmore | Major, USA (February 8, 1864) Brigadier general, USV (November 29, 1862) | Major general, USA (March 13, 1865) Major general, USV (March 19, 1865) | USMA, 1850 |
| Carr, Eugene Asa | Major, USA (July 17, 1862) Brigadier general, USV (March 7, 1862) | Major general, USA (March 13, 1865) Major general, USV (March 11, 1865) | USMA, 1850 MOH, Battle of Pea Ridge (March 7, 1862) |
| Carr, Joseph Bradford | Brigadier general, USV (March 30, 1863) | Major general, USV (March 13, 1865) | Original appointment as brigadier general, USV (September 7, 1862) expired March 4, 1863; second appointment (March 30, 1863) expired March 30, 1864; finally confirmed June 30, 1864 |
| Carrington, Henry Beebee | Colonel, USA (May 14, 1861) Brigadier general, USV (November 29, 1862) | | |
| Carroll, Samuel Sprigg | Captain, USA (November 1, 1861) Brigadier general, USV (May 12, 1864) | Major general, USA (March 13, 1865) Major general, USV (March 13, 1865) | USMA, 1856 |
| Carter, Samuel Powhatan | Commander, USN (June 25, 1865) Brigadier general, USV (May 1, 1862) | Major general, USV (March 13, 1865) | U.S. Naval Academy, 1846 Only officer ever to hold flag rank in both the U.S. Army and U.S. Navy (appointed Rear Admiral May 16, 1882) |
| Casey, Silas | Colonel, USA (October 9, 1861) Major general, USV (May 31, 1862) | Major general, USA (March 13, 1865) | USMA, 1826 |
| Catterson, Robert Francis, M.D. | Brigadier general, USV (May 31, 1865) | | |
| Chamberlain, Joshua Lawrence (b. Lawrence Joshua Chamberlain) | Brigadier general, USV (June 19, 1864) | Major general, USV (March 29, 1865) | MOH, Battle of Gettysburg (July 2, 1863) Detailed to receive surrender of the Army of Northern Virginia (April 12, 1865) Governor of Maine (1866–1870) One of only two general officers ever promoted on the field by General Grant |
| Chambers, Alexander | Captain, USA (May 14, 1861) Brigadier general, USV (August 11, 1863) | Brigadier general, USA (March 13, 1865) | USMA, 1853 Volunteer appointment cancelled by the Senate April 6, 1864, ostensibly because Chambers was not a legal resident of Iowa |
| Champlin, Stephen Gardner | Brigadier general, USV (November 29, 1862) | | Resigned November 8, 1863 DOW, Battle of Seven Pines (w. May 31, 1862, d. January 24, 1864) |
| Chapman, George Henry | Brigadier general, USV (July 21, 1864) | Major general, USV (March 13, 1865) | |
| Chetlain, Augustus Louis | Brigadier general, USV (December 18, 1863) | Major general, USV (June 18, 1865) | |
| Chrysler, Morgan Henry | Brigadier general, USV (November 11, 1865) | Major general, USV (March 13, 1865) | |
| Clark, William Thomas | Brigadier general, USV (May 31, 1865) | Major general, USV (November 24, 1865) | U.S. Congressman from Texas (1869–1872) |
| Clay, Cassius Marcellus | Major general, USV (April 11, 1862) Eicher: inactive? | | Rejected appointment and resigned, March 11, 1863 U.S. minister to Russia (1863–1869) |
| Clayton, Powell | Brigadier general, USV (August 1, 1864) | | Confirmed February 1865, ordered returned to Senate February 28, 1865 returned March 2, 1865, no reconfirmation Governor of Arkansas (1868–1871) U.S. Senator from Arkansas (1871–1877) U.S. minister to Mexico (1897–1898); U.S. Ambassador to Mexico (1898–1905) |
| Cluseret, Gustave Paul | Brigadier general, USV (October 14, 1862) | | Arrested on unspecified charges, January, 1863 Resigned March 2, 1863 Volunteer appointment never confirmed |
| Cochrane, John | Brigadier general, USV (July 17, 1862) | | Resigned February 25, 1862 U.S. Congressman from New York (1857–1861) |
| Connor, Patrick Edward | Brigadier general, USV (March 30, 1863) | Major general, USV (March 13, 1865) | |
| Connor, Seldon | Brigadier general, USV (June 11, 1864) | | Governor of Maine (1876–1879) |
| Cook, John Pope | Brigadier general, USV (March 21, 1862) | Major general, USV (August 24, 1865) | |
| Cooke, Philip St. George | Brigadier general, USA (November 12, 1861) | Major general, USA (March 13, 1865) | USMA, 1827 Father of General John Rogers Cooke, CSA Father-in-law of General James Ewell Brown Stuart, CSA |
| Cooper, James | Brigadier general, USV (May 17, 1861) | | Died March 28, 1863 U.S. Congressman from Pennsylvania (1849–1843) U.S. Senator from Pennsylvania (1849–1855) |
| Cooper, Joseph Alexander | Brigadier general, USV (July 30, 1864) | Major general, USV (March 13, 1865) | |
| Copeland, Joseph Tarr | Brigadier general, USV (November 29, 1862) | | Resigned November 8, 1865 |
| Corcoran, Michael | Brigadier general, USV (July 21, 1861) | | Died in riding accident December 22, 1863 |
| Corse, John Murray | Brigadier general, USV (August 11, 1863) | Major general, USV (October 5, 1864) | USMA (class of 1857), withdrew 1855 |
| Couch, Darius Nash | Major general, USV (July 4, 1862) | | USMA, 1846 Resigned May 26, 1865 |
| Cowdin, Robert | Brigadier general, USV (September 26, 1862) | | Appointment expired March 4, 1863 Relieved and mustered out March 30, 1863 |
| Cox, Jacob Dolson | Major General (December 7, 1864) | | Original appointment as major general, USV (October 6, 1862) expired March 4, 1863 Resigned June 27, 1864 Governor of Ohio (1866–1867) United States Secretary of the Interior (1869–1870) U.S. Congressman from Ohio (1877–1879) |
| Craig, James | Brigadier general, USV (March 21, 1862) | | Resigned May 5, 1863 U.S. Congressman from Missouri (1857–1861) |
| Crawford, Samuel Wylie, M.D. | Lieutenant colonel, USA (February 17, 1864) Brigadier general, USV (April 25, 1862) | Major general, USA (March 13, 1865) Major general, USV (August 1, 1864) | |
| Crittenden, Thomas Leonidas | Major general, USV (July 17, 1862) | | Resigned December 13, 1864 Son of Senator John Jordan Crittenden Brother of General George Bibb Crittenden, CSA Cousin of Thomas Turpin Crittenden |
| Crittenden, Thomas Turpin | Brigadier general, USV (April 28, 1862) | | Resigned May 5, 1863 Nephew of Senator John Jordan Crittenden Cousin of Thomas Leonidas Crittenden and General George Bibb Crittenden, CSA |
| Crocker, Marcellus Monroe | Brigadier general, USV (November 29, 1862) | | USMA (class of 1851), withdrew 1849 Died of illness August 26, 1865 |
| Crook, George | Captain, USA (May 14, 1861) Major general, USV (October 21, 1864) | Major general, USA (March 13, 1865) | USMA, 1852 |
| Croxton, John Thomas | Brigadier general, USV (July 30, 1864) | Major general, USV (April 27, 1865) | U.S. minister to Bolivia (1873–1874) |
| Cruft, Charles | Brigadier general, USV (July 16, 1862) | Major general, USV (March 5, 1865) | |
| Cullum, George Washington | Lieutenant colonel, USA (March 3, 1863) Brigadier general, USV (November 1, 1861) | Major general, USA (March 13, 1865) | USMA, 1833 Superintendent, USMA (1864–1866) Created the Cullum number system to identify USMA graduates Brother-in-law to Schuyler Hamilton (married widow of Henry Wager Halleck) |
| Curtis, Newton Martin | Brigadier general, USV (January 15, 1865) | Major general, USV (March 13, 1865) | MOH, First Battle of Fort Fisher (January 15, 1865) U.S. Congressman from New York (1891–1897) |
| Curtis, Samuel Ryan | Major general, USV (March 21, 1862) | | USMA, 1831 U.S. Congressman from Iowa (1857–1861) |
| Custer, George Armstrong | Captain, USA (June 5, 1862) Major general, USV (April 15, 1865) | Major general, USA (March 13, 1865) | USMA, 1861 |
| Cutler, Lysander | Brigadier general, USV (November 29, 1862) | Major general, USV (August 19, 1864) | Resigned June 30, 1865 |

### D

| Name | Substantive Rank | Brevet Rank | Notes |
| Daggett, Aaron Simon | Lieutenant colonel, USV (January 23, 1865) | Brigadier general, USV (March 13, 1865) | Last surviving brevet general (d. May 14, 1938) |
| Dana, Napoleon Jackson Tecumseh | Major general, USV (November 29, 1862) | | USMA, 1842 Resigned May 27, 1865 |
| Davidson, John Wynn | Major, USA (November 14, 1861) Brigadier general, USV (February 3, 1862) | Major general, USA (March 13, 1865) Major general, USV (March 13, 1865) | USMA, 1845 |
| Davies, Henry Eugene | Major general, USV (May 4, 1865) | | Nephew of Thomas Alfred Davies |
| Davies, Thomas Alfred | Brigadier general, USV (March 7, 1862) | Major general, USV (July 11, 1865) | USMA, 1829 Uncle of Henry Eugene Davies |
| Davis, Edmund Jackson | Brigadier general, USV (November 10, 1864) | | Governor of Texas (1870–1874) |
| Davis, Jefferson Columbus | Captain, USA (May 14, 1861) Brigadier general, USV (December 18, 1861) | Major general, USA (March 13, 1865) Major general, USV (August 8, 1864) | Shot and killed Major General William Nelson in a private altercation (September 29, 1862) |
| Dawes, Rufus Robinson | Colonel, USV (July 5, 1864) | Brigadier general, USV (March 13, 1865) | Resigned August 10, 1864 U.S. Congressman from Ohio (1881–1883) Father of Vice President Charles Gates Dawes |
| Deitzler, George Washington | Brigadier general, USV (November 29, 1862) | | Resigned August 27, 1863 Major General of Kansas Militia, 1864 |
| Delafield, Richard | Brigadier general, USA (April 22, 1864) | Major general, USA (March 13, 1865) | USMA, 1818 Superintendent, USMA (1838–1845, 1856–1861, 1861) Chief of Engineers (1864–1866) |
| Dennis, Elias Smith | Brigadier general, USV (November 29, 1862) | Major general, USV (March 13, 1865) | |
| Dent, Frederick Tracy | Lieutenant colonel, USA (March 20, 1864) Brigadier general, USV (April 5, 1865) | Brigadier general, USA (March 13, 1865) | USMA, 1843 Brother-in-law of Ulysses S. Grant |
| Denver, James W. | Brigadier general, USV (August 14, 1861) | | Resigned March 5, 1863 U.S. Congressman from California (1855–1857) Territorial Governor of Kansas (1857–1858) Namesake of Denver, Colorado |
| De Russy, Gustavus Adolphus | Captain, USA (August 17, 1857) Brigadier general, USV (May 23, 1863) | Brigadier general, USA (March 13, 1865) | USMA (class of 1839), resigned in 1838 Son of René Edward De Russy Brother-in-law of Henry Jackson Hunt and Lewis Cass Hunt |
| De Russy, René Edward | Colonel, USA (March 3, 1863) | Brigadier general, USA (March 13, 1865) | USMA, 1812 Superintendent, USMA (1833–1838) Father of Gustavus Adolphus De Russy Father-in-law of Henry Jackson Hunt and Lewis Cass Hunt |
| De Trobriand, Philippe Régis Dénis de Keredern | Brigadier general, USV (January 5, 1864) | Major general, USV (April 9, 1865) | |
| Devens, Charles Jr. | Brigadier general, USV (April 15, 1862) | Major general, USV (April 3, 1865) | Commander-in-chief, GAR (1873–1875) Attorney General of the United States (1877–1881) |
| Devin, Thomas Casimer | Brigadier general, USV (October 19, 1864) | Major general, USV (March 13, 1865) | |
| Deweese, John Thomas | Lieutenant colonel, USV | Brigadier general, USV (March 13, 1865) | U.S. Congressman from North Carolina (1868–1870) |
| Dewey, Joel Allen | Brigadier general, USV (November 20, 1865) | | Last Civil War general appointed |
| Diven, Alexander Samuel | Colonel, USV (October 21, 1862) | Brigadier general, USV (August 30, 1864) | Resigned May 11, 1863 U.S. Congressman from New York (1861–1863) |
| Dix, John Adams | Major general, USV (May 16, 1861) | | Resigned November 30, 1865 U.S. Senator from New York (1845–1849) Secretary of the Treasury (1861) U.S. minister to France (1866–1869) Governor of New York (1873–1874) Highest-ranking volunteer officer |
| Dodge, Charles Cleveland | Brigadier general, USV (November 29, 1862) | | Resigned June 12, 1863 |
| Dodge, Grenville Mellen | Major general, USV (June 7, 1864) | | U.S. Congressman from Iowa (1867–1869) Commander-in-chief, MOLLUS (1907–1909) |
| Doolittle, Charles Camp | Brigadier general, USV (January 27, 1865) | Major general, USV (March 13, 1865) | |
| Doubleday, Abner | Lieutenant colonel, USA (September 20, 1863) Major general, USV (November 29, 1862) | Major general, USA (March 13, 1865) | USMA, 1842 Aimed first cannon to return fire from Fort Sumter |
| Dow, Neal | Brigadier general, USV (April 28, 1862) | | Resigned November 30, 1864 |
| Drake, Francis Marion | Lieutenant colonel, USV (October 4, 1862) | Brigadier general, USV (February 22, 1865) | Governor of Iowa (1896–1898) |
| Draper, William Francis | Lieutenant colonel, USV (August 9, 1864) | Brigadier general, USV (March 13, 1865) | U.S. Congressman from Massachusetts (1893–1897) U.S. Ambassador to Italy (1897–1900) |
| Duffié, Alfred Napoleon Alexander (aka. Duffie, Alfred Nattie) | Brigadier general, USV (June 23, 1863) | | |
| Dumont, Ebenezer | Brigadier general, USV (September 3, 1861) | | Resigned February 28, 1863 U.S. Congressman from Indiana (1863–1867) |
| Dunn, William McKee | Lieutenant colonel, USA (June 22, 1864) | Brigadier general, USA (March 13, 1865) | U.S. Congressman from Indiana (1859–1863) |
| Duryée, Abram | Brigadier general, USV (August 31, 1861) | Major general, USV (March 13, 1865) | Resigned January 5, 1863 |
| Dutton, Arthur Henry | Captain, USA (October 2, 1863) Colonel, USV (September 5, 1862) | Colonel, USA (May 26, 1864) Brigadier general, USV (May 16, 1864) | USMA, 1861 DOW, Battle of Proctor's Creek (w. May 16, 1864, d. June 5, 1864) |
| Duval, Isaac Hardin | Brigadier general, USV (September 24, 1864) | Major general, USV (March 13, 1865) | U.S. Congressman from West Virginia (1869–1871) |
| Dwight, William | Brigadier general, USV (November 29, 1862) | | USMA (class of 1853), discharged January 31, 1853 |
| Dyer, Alexander Brydie | Brigadier general, USA (September 12, 1864) | Major general, USA (March 13, 1865) | USMA, 1837 Chief of Ordnance (1864–1874) |

### E

| Name | Substantive Rank | Brevet Rank | Notes |
| Eaton, Amos Beebe | Brigadier general, USA (June 29, 1864) | Major general, USA (March 13, 1865) | USMA, 1826 Commissary General of Subsistence (1864–1874) |
| Edgerton, Alonzo Jay | Colonel, USV (February 15, 1864) | Brigadier general, USV (March 13, 1865) | U.S. Senator from Minnesota (1881) |
| Edwards, John | Brigadier General (September 24, 1864) | | U.S. Congressman from Arkansas (1871 – February 8, 1872) Removed from seat when election was successfully contested |
| Edwards, Oliver | Brigadier general, USV (May 19, 1865) | Major general, USV (April 5, 1865) | |
| Egan, Thomas Washington | Brigadier general, USV (September 3, 1864) | Major general, USV (October 27, 1864) | |
| Ekin, James A. | Lieutenant colonel, USA (July 29, 1865) Colonel, USV (August 2, 1864) | Brigadier general, USA (March 13, 1865) Brigadier general, USV (March 8, 1865) | Commissioner on Lincoln assassination trial |
| Ellet, Alfred Washington | Brigadier general, USV (November 1, 1862) | | Resigned, December 31, 1864 Brother of Charles Ellet, Jr. Uncle of Charles Rivers Ellet |
| Elliott, Washington Lafayette | Major, USA (November 5, 1861) Brigadier general, USV (June 11, 1862) | Major general, USA (March 13, 1865) Major general, USV (March 13, 1865) | USMA (class of 1845), left in 1844 |
| Emory, William Helmsley | Colonel, USA (October 27, 1863) Major general, USV (September 25, 1865) | Major general, USA (March 13, 1865) | USMA, 1831 Namesake of Emory Peak |
| Estey, George Peabody (aka. George Peabody Este) | Brigadier general, USV (June 26, 1865) | | |
| Eustis, Henry Lawrence | Brigadier General (September 12, 1863) | | USMA, 1842 Resigned, June 27, 1864 |
| Ewing, Charles | Captain, USA (May 14, 1861) Brigadier general, USV (March 8, 1865) | Colonel, USA (March 13, 1865) | Son of Thomas Ewing Brother of Thomas Ewing, Jr. Brother of Hugh Boyle Ewing Brother-in-law of William Tecumseh Sherman |
| Ewing, Hugh Boyle | Brigadier general, USV (November 29, 1862) | Major general, USV (March 13, 1865) | USMA, class of 1848, never graduated U.S. minister to the Netherlands (1866–1870) Son of Thomas Ewing Brother of Thomas Ewing, Jr. Brother of Charles Ewing Brother-in-law of William Tecumseh Sherman |
| Ewing, Thomas Jr. | Brigadier general, USV (March 13, 1863) | Major general, USV (March 13, 1865) | Resigned February 23, 1865 U.S. Congressman from Ohio (1877–1881) Son of Thomas Ewing Brother of Charles Ewing Brother of Hugh Boyle Ewing Brother-in-law of William Tecumseh Sherman |

### F

| Name | Substantive Rank | Brevet Rank | Notes |
| Fairchild, Lucius | Captain, USA (August, 1861) Brigadier general, USV (October 13, 1863) | | Resigned November, 1863 Governor of Wisconsin (1866–1872) U.S. minister to Spain (1880–1881) Commander-in-chief, GAR (1886–1887) Commander-in-chief, MOLLUS (1893–1895) |
| Farnsworth, Elon John | Captain, USV (December 25, 1861) | | Nominated brigadier general, USV, June 29, 1863, but not confirmed by U.S. Senate; Assigned to command 1st Brigade, 3rd Division, Cavalry Corps, Army of the Potomac, June 28, 1863, KIA, Battle of Gettysburg (July 3, 1863) |
| Ferrero, Edward | Brigadier general, USV (May 6, 1863) | Major general, USV (December, 1864) | Original appointment as brigadier general, USV (September 10, 1862) expired March 4, 1863 |
| Ferry, Orris S. | Brigadier general, USV (March 17, 1862) | Major general, USV (May 23, 1865) | U.S. Congressman from Connecticut (1859–1861) U.S. Senator from Connecticut (1867–1875) |
| Fessenden, Francis | Captain, USA Major general, USV (November 9, 1865) | | Son of Secretary of the Treasury William Pitt Fessenden Brother of James Deering Fessenden |
| Fessenden, James Deering | Brigadier general, USV (August 8, 1864) | Major general, USV (March 13, 1865) | Son of Secretary of the Treasury William Pitt Fessenden Brother of Francis Fessenden |
| Fisk, Clinton Bowen | Brigadier general, USV (November 24, 1862) | Major general, USV (March 13, 1865) | |
| Force, Manning Ferguson | Brigadier general, USV (August 11, 1863) | Major general, USV | MOH, Battle of Atlanta (July 22, 1864) Brother-in-law of John Pope |
| Forsyth, James W. | Captain, USA (October 24, 1861) Brigadier general, USV (March 19, 1865) | Brigadier general, USA (March 13, 1865) | USMA, 1856 |
| Foster, John Gray | Captain, USA Major general, USV (July 18, 1862) | Major general, USA (March 13, 1865) | USMA, 1846 |
| Foster, Robert Sanford | Brigadier general, USV (June 12, 1863) | Major general, USV | Commissioner on Lincoln assassination trial |
| Franklin, William Buel | Colonel, USA (May 14, 1861) Major general, USV (July 4, 1862) | | USMA, 1843 |
| Frémont, John Charles | Major general, USA (May 14, 1861) | | Resigned June 4, 1864 U.S. Senator from California (1850–1851) Territorial Governor of Arizona (1878–1887) Son-in-law of Senator Thomas Hart Benton |
| French, William H. | Colonel, USA Major general, USV (November 29, 1862) | | USMA, 1837 Mustered out of volunteer service May 6, 1864 |
| Fry, James Barnet | Brigadier general, USA (April 21, 1864) | Major general, USA | USMA, 1847 Provost Marshal General (1863–1866) |
| Fry, Speed Smith | Brigadier general, USV (March 21, 1862) | | |
| Fuller, John Wallace | Brigadier general, USV (January 5, 1864) | Major general, USV (March 13, 1865) | |

### G

| Name | Substantive Rank | Brevet Rank | Notes |
| Gamble, William | Brigadier general, USV (September 25, 1865) | | |
| Garfield, James Abram | Major general, USV (September 19, 1863) | | Resigned December 5, 1863 U.S. Congressman from Ohio (1863–1881) 20th President of the United States (1881) Second President to die by assassination |
| Garrard, Kenner | First Lieutenant, USA Brigadier general, USV (July 23, 1863) | Major general, USA (March 13, 1863) Major general, USV (December 16, 1864) | USMA, 1851 First cousin (once removed) of Theophilus Toulmin Garrard |
| Garrard, Theophilus Toulmin | Brigadier general, USV (November 29, 1862) | | Mustered out April 4, 1864 First cousin (once removed) of Kenner Garrard |
| Geary, John White | Brigadier general, USV (April 25, 1862) | Major general, USV (January 12, 1865) | Territorial Governor of Kansas (1856–1857) Governor of Pennsylvania (1867–1873) |
| Getty, George Washington | Captain, USA Brigadier general, USV (September 25, 1862) | Major general, USA (March 13, 1865) Major general, USV (August, 1864) | USMA, 1840 |
| Gibbon, John | Captain, USA Major general, USV (June 7, 1864) | Major general, USA (March 13, 1865) | USMA, 1847 Commander-in-chief, MOLLUS (1895–1896) |
| Gibbs, Alfred | Captain, USA Brigadier general, USV (October 19, 1864) | Major general, USA Major general, USV | USMA, 1846 |
| Gilbert, Charles Champion | Major, USA (July, 1863) Brigadier general, USV (September 4, 1862) | Colonel, USA | USMA, 1846 Appointment expired, March 4, 1863 Assigned to duty as "acting" Major General (August, 1862) by Horatio Gouverneur Wright |
| Gilbert, James Isham | Brigadier general, USV (February 9, 1865) | Major general, USV | |
| Gillem, Alvan Cullem | Captain, USA (July 12, 1861) Major general, USV (November 3, 1865) | Major general, USA (April 12, 1865) | USMA, 1851 |
| Gillmore, Quincy Adams | Major, USA (June 1, 1863) Major general, USV (July 10, 1863) | Brigadier general, USA (March 13, 1865) | USMA, 1851 |
| Gordon, George Henry | Brigadier general, USV (June 9, 1862) | Major general, USV (March 13, 1865) | USMA, 1846 |
| Gorman, Willis A. | Brigadier general, USV (September 7, 1861) | | Mustered out May 4, 1864 Territorial Governor of Minnesota (1853–1857) |
| Graham, Charles Kinnaird | Brigadier general, USV (November 29, 1862) | Major general, USV (March 13, 1865) | |
| Graham, Lawrence Pike | Colonel, USA (1864) Brigadier general, USV (August, 1861) | Brigadier general, USA (March 13, 1865) | |
| Granger, Gordon | Major general, USV (September 17, 1862) | Major general, USA (March 13, 1865) | USMA, 1845 |
| Granger, Robert Seaman | Major, USA (September, 1861) Brigadier general, USV (October, 1862) | Major general, USA | USMA, 1838 |
| Grant, Lewis Addison | Brigadier general, USV (April 27, 1864) | | MOH, Battle of Salem Church (May 3, 1863) |
| Grant, Ulysses S. (b. Grant, Hiram Ulysses) | Lieutenant General, USA (March 4, 1864) | | USMA, 1843 Received the Thanks of Congress (December 17, 1863) Received the Congressional Gold Medal (December 17, 1863) First full-grade Lieutenant General since George Washington First General since George Washington (July 25, 1866) General-in-Chief (1864–1869) 18th President of the United States (1869–1877) |
| Greene, George Sears | Brigadier general, USV (April 28, 1862) | | USMA, 1823 |
| Gregg, David McMurtrie | Captain, USA (1861) Brigadier general, USV (November 29, 1862) | | USMA, 1855 Resigned February 3, 1865 Commander-in-chief, MOLLUS (1903–1905) Cousin of Pennsylvania Governor Andrew Gregg Curtin |
| Gresham, Walter Quintin | Brigadier general, USV (August 11, 1883) | Major general, USV (March 13, 1865) | Resigned due to wounds, 1863 Postmaster General (1883–1884) Secretary of the Treasury (1884) Secretary of State (1893–1895) |
| Grierson, Benjamin Henry | Major general, USV (May 27, 1865) | | |
| Griffin, Charles | Captain, USA Major general, USV (April 2, 1865) | Major general, USA (March 13, 1865) | USMA, 1847 Brother-in-law of Samuel Sprigg Carroll |
| Griffin, Simon Goodell | Brigadier general, USV (May 12, 1864) | Major general, USV (April 2, 1865) | |
| Grose, William | Brigadier general, USV (July 30, 1864) | Major general, USV (August 13, 1865) | |
| Grover, Cuvier | Captain, USA Brigadier general, USV (April 14, 1862) | Major general, USA Major general, USV | USMA, 1850 |

### H

| Name | Substantive Rank | Brevet Rank | Notes |
| Hackleman, Pleasant Adams | Brigadier general, USV (April 20, 1862) | | KIA, Battle of Corinth (October 3, 1862) |
| Halleck, Henry Wager | Major general, USA (August 19, 1861) | | USMA, 1839 General-in-Chief, U.S. Army (July 23, 1862 – March 12, 1864) Chief of staff, U.S. Army (March 12, 1864-May, 1865) |
| Hamblin, Joseph Eldridge | Brigadier general, USV (May 19, 1865) | Major general, USV (March 13, 1865) | |
| Hamilton, Andrew J. | Brigadier general, USV (September 18, 1863) | | First appointment as brigadier general (November 14, 1862) never confirmed Reconstruction Governor of Texas (June, 1865-August, 1866) |
| Hamilton, Charles Smith | Major general, USV (September 19, 1862) | | USMA, 1843 Resigned, April 13, 1863 |
| Hamilton, Schuyler | Colonel, USA Brigadier general, USV (November 12, 1861) | | USMA, 1841 Grandson of Alexander Hamilton Brother-in-law of Henry W. Halleck; later brother-in-law to George Washington Cullum Nominated major general, USV (September 17, 1862), never confirmed due to illness Resigned February 27, 1863 |
| Hamlin, Cyrus | Colonel, USA (February 12, 1863) Brigadier general, USV (December 13, 1864) | Major general, USV (March 13, 1865) | Son of Vice President Hannibal Hamlin Brother of Charles Hamlin |
| Hammond, William Alexander | Brigadier general, USA (April 25, 1862) | | Surgeon General (1862–1864) Dismissed from service, August 18, 1864 |
| Hancock, Winfield Scott | Brigadier general, USA (August 12, 1864) Major general, USV (November 29, 1862) | | USMA, 1844 Received the Thanks of Congress (April 21, 1866) Commander-in-chief, MOLLUS (1879–1886) |
| Hardin, Martin Davis | Major, USA Brigadier general, USV (July 2, 1864) | Brigadier general, USA | USMA, 1859 |
| Harding, Abner Clark | Brigadier general, USV (March 13, 1863) | | Resigned June, 1863 U.S. Congressman from Illinois (1865–1869) |
| Harker, Charles Garrison | Brigadier general, USV (April 10, 1864) | | USMA, 1858 KIA, Battle of Kennesaw Mountain (June 26, 1864) |
| Harland, Edward | Brigadier general, USV (November 29, 1862) | | |
| Harney, William Selby | Brigadier general, USA (June 14, 1858) | Major general, USA (March 13, 1865) | |
| Harris, Thomas Maley | Brigadier general, USV (March 29, 1865) | | Commissioner on Lincoln assassination trial |
| Harrison, Benjamin | Colonel, USV | Brigadier general, USV (January 23, 1865) | U.S. Senator from Indiana (1881–1887) 23rd President of the United States (1889–1893) |
| Harrow, William | Brigadier general, USV (November 29, 1862) | | Relieved, September 1864 Resigned, April 7, 1865 |
| Hartranft, John F. | Brigadier general, USV (May 12, 1864) | Major general, USV (March 28, 1865) | MOH, First Battle of Bull Run Provost Marshal, Lincoln Assassination trial Commander-in-chief, GAR (1875–1877) Governor of Pennsylvania (1873–1879) |
| Hartsuff, George Lucas | Lieutenant colonel, USA Major general, USV (November 19, 1862) | Major general, USA | USMA, 1852 |
| Hascall, Milo Smith | Brigadier general, USV (April 25, 1862) | | USMA, 1852 Recommended for promotion to major general, USV, September 12, 1864; no action taken Resigned, October 27, 1864 |
| Haskin, Joseph Abel | Lieutenant colonel, USA Brigadier general, USV (August 5, 1864) | Brigadier general, USA (March 13, 1865) | USMA, 1839 |
| Hatch, Edward | Brigadier general, USV (April 27, 1864) | Major general, USV | |
| Hatch, John Porter | Major, USA (1863) Brigadier general, USV (September 28, 1861) | Brigadier general, USA Major general, USV | USMA, 1845 MOH, Battle of South Mountain |
| Haupt, Herman | Colonel, USA (April 27, 1862) Brigadier general, USV (September 5, 1862) | | USMA, 1835 Refused commission as brigadier general, resigned September 14, 1863 |
| Hawkins, John Parker | Captain, USA Brigadier general, USV (April 13, 1863) | Major general, USA (March 13, 1865) Major general, USV (March 13, 1865) | USMA, 1852 Brother-in-law of E.R.S. Canby |
| Hawley, Joseph Roswell | Brigadier general, USV (September 13, 1864) | Major general, USV (March 13, 1865) | Governor of Connecticut (1866–1867) U.S. Congressman from Connecticut (1872–1875, 1879–1881) U.S. Senator from Connecticut (1881–1905) |
| Hayes, Joseph | Brigadier general, USV (May 12, 1864) | Major general, USV (March 13, 1865) | |
| Hayes, Rutherford Birchard | Brigadier general, USV (October 19, 1864) | Major general, USV (March 13, 1865) | Resigned commission, June, 1865 U.S. Congressman from Ohio (1865–1867) Governor of Ohio (1868–1872, 1876–1877) 19th President of the United States (1877–1881) Commander-in-chief, MOLLUS (1886, 1888–1893) |
| Haynie, Isham N. | Brigadier general, USV (November 29, 1862) | | Commission never confirmed by Senate, expired March 4, 1863 Resigned, March 6, 1863 Warner lists as brig. gen., Eicher does not |
| Hays, Alexander | Captain, USA Brigadier general, USV (September 29, 1862) | Colonel, USA Major general, USV (May 5, 1864) | USMA, 1844 KIA, Battle of the Wilderness (May 5, 1864) |
| Hays, William | Major, USA (1863) Brigadier general, USV (December 27, 1862) | | USMA, 1840 Relieved of duty, April 6, 1865 |
| Hazen, William Babcock | Colonel, USA Major general, USV (December 13, 1864) | Major general, USA | USMA, 1856 |
| Heckman, Charles Adam | Brigadier general, USV (November 29, 1862) | | Relieved, March 23, 1865 Resigned, May 25, 1865 |
| Heintzelman, Samuel P. | Colonel, USA (May 14, 1861) Major general, USV (May 5, 1862) | | USMA, 1826 |
| Herron, Francis Jay | Major general, USV (November 29, 1862) | | Youngest Major General MOH, Battle of Pea Ridge |
| Hinks, Edward Winslow (b. Hincks, Edward Winslow; aka Hinks, Edward Ward) | Second Lieutenant, USA (April 26, 1861) Brigadier general, USV (November 29, 1862) | Brigadier general, USA (March 2, 1867) Major general, USV (March 13, 1865) | Resigned regular Army commission June 4, 1861, returned to regular service after the war |
| Hitchcock, Ethan Allen | Colonel, USA Major general, USV (February 10, 1862) | Brigadier general, USV (1848) | USMA, 1817 Grandson of Ethan Allen |
| Hobson, Edward H. | Brigadier general, USV (November 29, 1862) | | |
| Holt, Joseph | Brigadier general, USA (June 22, 1864) | | Postmaster General (1859–1860) Secretary of War (1861–1862) Judge Advocate General Presiding judge on the Lincoln assassination trial |
| Hooker, Joseph | Brigadier general, USA (September 20, 1862) Major general, USV (May 5, 1862) | | USMA, 1837 Received Thanks of Congress (January 28, 1864) |
| Hovey, Alvin P. | Brigadier general, USV (April 28, 1862) | Major general, USV (June 4, 1864) | U.S. minister to Peru (1866–1870) U.S. Congressman (1887–1889) Governor of Indiana (1889–1891) |
| Hovey, Charles Edward | Brigadier general, USV (September 5, 1862) | Major general, USV (March 13, 1865) | Commission never confirmed, expired March 4, 1863 Resigned due to wounds, May, 1863 |
| Howard, Oliver Otis | Brigadier general, USA (December 21, 1864) Major general, USV (November 29, 1862) | | USMA, 1854 MOH, Battle of Fair Oaks Received Thanks of Congress (January 28, 1864) Commissioner of the Freedmen's Bureau (1865–1871) Superintendent, USMA (1881–1882) Last surviving Civil War army commander and substantive Regular Army general. |
| Howe, Albion Parris | Captain, USA (1855) Brigadier general, USV (June 22, 1862) | Major general, USA (March 13, 1865) Major general, USV (March 13, 1865) | USMA, 1841 Commissioner on Lincoln assassination trial |
| Howell, Joshua B. | Brigadier general, USV (September 12, 1864) | | Posthumous promotion Died in riding accident, September 12, 1864 |
| Humphreys, Andrew Atkinson | Colonel, USA Major general, USV (July 8, 1863) | Major general, USA | USMA, 1831 |
| Hunt, Henry Jackson | Lieutenant colonel, USA Brigadier general, USV (September 15, 1862) | Major general, USA (March 13, 1865) Major general, USV (1863) | USMA, 1839 Brother of Lewis Cass Hunt Son-in-law of René Edward De Russy Brother-in-law of John Parker Hawkins and Gustavus Adolphus De Russy |
| Hunt, Lewis Cass | Major, USA (1863) Brigadier general, USV (November 29, 1862) | Brigadier general, USA (1865) | USMA, 1847 Brother of Henry Jackson Hunt Son-in-law of René Edward De Russy Brother-in-law of John Parker Hawkins and Gustavus Adolphus De Russy |
| Hunter, David | Colonel, USA Major general, USV (August 13, 1861) | Major general, USA | USMA, 1822 Presiding Commissioner on Lincoln assassination trial |
| Hurlbut, Stephen A. | Major general, USV (September 17, 1862) | | Mustered out of service for alleged corruption, June 20, 1865 First commander-in-chief, GAR (1866–1868) U.S. minister to Colombia (1869–1872) U.S. Congressman from Illinois (1873–1877) U.S. minister to Peru (1881–1882) |

### I

| Image | Name | Substantive Rank | Brevet Rank | Notes |
| | Ingalls, Rufus | Major, USA (1862) Brigadier general, USV (May 23, 1863) | Major general, USA Major general, USV | USMA, 1843 16th Quartermaster General of the U.S. Army 1882-1883 |

### J

| Name | Substantive Rank | Brevet Rank | Notes |
| Jackson, Conrad Feger | Brigadier general, USV (July 17, 1862) | | KIA, Battle of Fredericksburg (December 13, 1862) |
| Jackson, James Streshly | Brigadier general, USV (July 19, 1862) | | U.S. Congressman from Kentucky (1861) KIA, Battle of Perryville (October 8, 1862) |
| Jackson, Nathaniel James | Brigadier general, USV (September 24, 1862) | Major general, USV | |
| Jackson, Richard Henry | Captain, USA (1862) Brigadier general, USV (May 19, 1865) | Brigadier general, USA Major general, USV | Postwar appointment but listed by Eicher and Warner |
| Jameson, Charles Davis | Brigadier general, USV (September 3, 1861) | | d. November 6, 1862 of illness |
| Johnson, Andrew | Brigadier general, USV (March 4, 1862) | | U.S. Congressman from Tennessee (1843–1853) Governor of Tennessee (1853–1857, 1875) U.S. Senator from Tennessee (1857–1862) Military Governor of Tennessee (1862–1864) 16th Vice President of the United States (1865) 17th President of the United States (1865–1869) |
| Johnson, Richard W. | Brigadier general, USV (October 11, 1861) | Major general, USA Major general, USV | USMA, 1849 |
| Jones, Patrick Henry | Brigadier general, USV (December 6, 1864) | | |
| Judah, Henry Moses | Major, USA (June 30, 1862) Brigadier general, USV (March 21, 1862) | | USMA, 1843 |

### K

| Name | Substantive Rank | Brevet Rank | Notes |
| Kane, Thomas Leiper | Brigadier general, USV (September 7, 1862) | Major general, USV (March 13, 1865) | Resigned November, 1863 |
| Kautz, August Valentin | Captain, USA (May, 1861) Brigadier general, USV (May 7, 1864) | Major general, USA (March 13, 1865) Major general, USV (March 13, 1865) | USMA, 1852 Commissioner, Lincoln assassination trial |
| Kearny, Philip | Brigadier general, USV (May 17, 1861) | | KIA, Battle of Chantilly (September 1, 1862) posthumous appt. Maj. Gen. USV confirmed March 9, 1863 |
| Keim, William High | Brigadier general, USV (September 20, 1861) | | Died of illness, May 18, 1862 |
| Kelley, Benjamin Franklin | Brigadier general, USV (May 17, 1861) | Major general, USV (August 5, 1864) | |
| Kenly, John Reese | Brigadier general, USV (August 22, 1862) | Major general, USV (March 13, 1865) | |
| Ketcham, John Henry | Brigadier general, USV (October 23, 1865) | Major general, USV (March 13, 1865) | U.S. Congressman from New York (1865–1873, 1877–1893, 1897–1906) |
| Ketchum, William Scott | Colonel, USA (1864) Brigadier general, USV (February 3, 1862) | Major general, USA (March 13, 1865) | USMA, 1834 |
| Keyes, Erasmus Darwin | Colonel, USA (1861) Major general, USV (May 5, 1862) | Brigadier general, USA | USMA, 1832 Resigned, May 6, 1864 |
| Kiernan, James Lawlor | Brigadier general, USV (August 1, 1863) | | Resigned February 3, 1864; Warner lists; Eicher shows as not confirmed |
| Kilpatrick, Hugh Judson | Major general, USV (June 18, 1865) | Major general, USA (March 13, 1865) | USMA, 1861 U.S. minister to Chile (1866–1870, 1881) |
| Kimball, Nathan | Brigadier general, USV (April 16, 1862) | Major general, USV (February 1, 1865) | |
| King, John Haskell | Colonel, USA (1865) Brigadier general, USV (November 29, 1862) | Major general, USA (March 13, 1865) Major general, USV (May 31, 1865) | |
| King, Rufus | Brigadier general, USV (May 17, 1861) | | USMA, 1833 Resigned October 1863 U.S. minister to the Papal States (1863–1867) Appointed minister in 1861, took a leave of absence to join the Army |
| Kirby, Edmund | First Lieutenant, USA (1861) Brigadier general, USV (May 28, 1863) | | USMA, 1861 DOW, Second Battle of Fredericksburg (w. May 3, 1863, d. May 28, 1863) |
| Kirk, Edward Needles | Brigadier general, USV (November 29, 1862) | | DOW, Battle of Stones River (w. December 31, 1862, d. July 21, 1863) |
| Knipe, Joseph Farmer | Brigadier general, USV (November 29, 1862) | | |
| Krzyzanowski, Wladimir | Colonel, USV (1861) | Brigadier general, USV (March 2, 1865) | First cousin of Frédéric Chopin Appointment as brigadier general, USV (November 29, 1862) not confirmed expired March 4, 1863, served at that grade until the Atlanta campaign Warner lists |

### L

| Name | Substantive Rank | Brevet Rank | Notes |
| Lander, Frederick West | Brigadier general, USV (May 17, 1861) | | Died of illness, March 2, 1862 |
| Lane, James H. | Brigadier general, USV (December 18, 1861) | | U.S. Congressman from Indiana (1853–1855) U.S. Senator from Kansas (1861–1866) Commission cancelled March 21, 1862 Reinstated April 11, 1862 |
| Lauman, Jacob G. | Brigadier general, USV (March 21, 1862) | Major general, USV (March 13, 1865) | Relieved of duty, July 15, 1863 |
| Lawler, Michael Kelly | Brigadier general, USV (November 29, 1862) | Major general, USV (March 13, 1865) | |
| Lawrence, Albert Gallatin | Captain, USV | Brigadier general, USV (March 25, 1865) | U.S. minister to Costa Rica (1867–1868) Son-in-law of Brigadier General Joseph Pannell Taylor and President Zachary Taylor Brother-in-law of John McLean Taylor |
| Ledlie, James H. | Brigadier general, USV (October 27, 1863) | | Original appointment as brigadier general, USV (December 24, 1862) expired March 4, 1863 Relieved of command, July, 1864 Resigned January 23, 1865 |
| Lee, Albert Lindley | Brigadier general, USV (November 29, 1862) | | Resigned May 4, 1865 |
| Leggett, Mortimer Dormer | Major general, USV (August 21, 1865) | | |
| Lightburn, Joseph Andrew Jackson | Brigadier general, USV (March 16, 1863) | | |
| Lockwood, Henry Hayes | Brigadier general, USV (August 8, 1861) | | USMA, 1836 |
| Logan, John Alexander | Major general, USV (November 29, 1862) | | Commander-in-chief, GAR (1868–1871) U.S. Congressman from Illinois (1859–1861, 1867–1871) U.S. Senator from Illinois (1871–1877, 1879–1886) |
| Long, Eli | Captain, USA (May 24, 1861) Brigadier general, USV (August 18, 1864) | Major general, USA Major general, USV | |
| Lowell, Charles Russell | Brigadier general, USV (October 19, 1864) | | KIA, Battle of Cedar Creek (October 19, 1864) |
| Lucas, Thomas John | Brigadier general, USV (November 10, 1864) | Major general, USV (March 26, 1865) | |
| Lyon, Nathaniel | Captain, USA Brigadier general, USV (May 17, 1861) | | USMA, 1841 KIA, Battle of Wilson's Creek (August 10, 1861) First Union general killed during the war Received the Thanks of Congress (December 24, 1861) |
| Lytle, William Haines | Brigadier general, USV (November 29, 1862) | | KIA, Battle of Chickamauga (September 20, 1863) |

### M

| Name | Substantive Rank | Brevet Rank | Notes |
| McArthur, John | Brigadier general, USV (March 21, 1862) | Major general, USV | |
| McCall, George Archibald | Brigadier general, USV (May 15, 1861) | | USMA, 1822 Resigned March 31, 1863 |
| McCleery, James | Major, USV (1865) | Brigadier general, USV (March 13, 1865) | U.S. Congressman from Louisiana (1871) |
| McClellan, George Brinton | Major general, USA (May 14, 1861) | | USMA, 1846 General-in-Chief (November 1, 1861 – July 22, 1862) Relieved of duty November 7, 1862 Resigned November 8, 1864 Governor of New Jersey (1878–1881) |
| McClernand, John Alexander | Major general, USV (May 21, 1862) | | Resigned November 30, 1864 U.S. Congressman from Illinois (1843–1851, 1859–1861) |
| McCook, Alexander McDowell | Major general, USV (July 17, 1862) | | Highest-ranking of the fourteen "Fighting McCooks" Brother of Daniel McCook, Jr., Edwin Stanton McCook, and Robert Latimer McCook Cousin of Anson George McCook and Edward Moody McCook |
| McCook, Daniel, Jr. | Brigadier general, USV (July 16, 1864) | | DOW, Battle of Kennesaw Mountain (w. June 27, 1864, d. July 17, 1864) Brother of Alexander McDowell McCook, Edwin Stanton McCook, and Robert Latimer McCook Cousin of Anson George McCook and Edward Moody McCook |
| McCook, Edward Moody | First Lieutenant, USA (May 8, 1861) Brigadier general, USV (April 27, 1864) | Brigadier general, USA Major general, USV | U.S. minister to Hawai'i (1866–1868) Territorial Governor of Colorado (1869–1873, 1874–1875) Brother of Anson George McCook Cousin of Alexander McDowell McCook, Daniel McCook, Jr., Edwin Stanton McCook, and Robert Latimer McCook |
| McCook, Robert Latimer | Brigadier general, USV (March 21, 1862) | | DOW sustained near Huntsville, Alabama (w. August 5, 1862, d. August 6, 1862) Brother of Alexander McDowell McCook, Daniel McCook, Jr., and Edwin Stanton McCook Cousin of Anson George McCook and Edward Moody McCook |
| McDowell, Irvin | Brigadier general, USA (May 14, 1861) Major general, USV (March 14, 1862) | | USMA, 1838 |
| McGinnis, George Francis | Brigadier general, USV (November 29, 1862) | | |
| McIntosh, John Baillie | Second Lieutenant, USA (1861) Brigadier general, USV (July 21, 1864) | Major general, USV (March 13, 1865) Major general, USA (March 13, 1865) | Brother of General James McQueen McIntosh, CSA |
| McKean, Thomas Jefferson | Brigadier general, USV (November 21, 1861) | Major general, USV (March 13, 1865) | USMA, 1831 |
| Mackenzie, Ranald Slidell | Captain, USA Brigadier general, USV (1864) | Brigadier general, USA Major general, USV | USMA, 1862 Nephew of Confederate diplomat John Slidell |
| McKinstry, Justus | Brigadier general, USV (September 2, 1861) | | USMA, 1838 Dismissed from service for corruption, January 28, 1863 |
| McLean, Nathaniel Collins | Brigadier general, USV (November 29, 1862) | | Resigned April 20, 1865 |
| McMillan, James Winning | Brigadier general, USV (November 29, 1862) | Major general, USV (March 5, 1865) | Resigned May 15, 1865 |
| McNeil, John | Brigadier general, USV (November 29, 1862) | Major general, USV (April 12, 1865) | Resigned April 12, 1865 |
| McPherson, James Birdseye | Brigadier general, USA (August 1, 1863) Major general, USV (October 8, 1862) | | USMA, 1853 KIA, Battle of Atlanta (July 22, 1864) Only Union Army commander to be KIA |
| Maltby, Jasper Adalmorn | Brigadier general, USV (August 4, 1863) | | |
| Mansfield, Joseph King Fenno | Brigadier general, USA (May 6, 1861) Major general, USV (July 18, 1862) | | USMA, 1822 DOW, Battle of Antietam (w. September 17, 1862, d. September 18, 1862) |
| Manson, Mahlon Dickerson | Brigadier general, USV (March 24, 1862) | | Resigned due to wounds, December 21, 1864 U.S. Congressman from Indiana (1871–1873) |
| Marcy, Randolph Barnes | Colonel, USA (August 9, 1861) Brigadier general, USV (September 28, 1861) | Brigadier general, USA (March 13, 1865) Major general, USA (March 13, 1865) | USMA, 1832 Inspector General, U.S. Army (1861–1881) Volunteer appointment expired March 4, 1863 Father-in-law of George Brinton McClellan |
| Marsh, Charles Carroll | Brigadier general, USV (November 29, 1862) | | Appointment withdrawn Resigned April 22, 1863 |
| Marston, Gilman | Brigadier general, USV (November 29, 1862) | | Resigned April 20, 1865 U.S. Congressman from New Hampshire (1859–1863, 1865–1867) U.S. Senator from New Hampshire (1889) |
| Martindale, John Henry | Brigadier general, USV (August 9, 1861) | Major general, USV (March 13, 1865) | USMA, 1835 Resigned September 13, 1864 |
| Mason, John Sanford | Major, USA (1864) Brigadier general, USV (November 29, 1862) | Brigadier general, USA (1865) | USMA, 1847 |
| Matthies, Charles Leopold (b. Matthies, Karl Leopold) | Brigadier general, USV (November 29, 1862) | | First officer to muster a company of volunteers for U.S. service (January 9, 1861) Resigned May 16, 1864 |
| Meade, George Gordon | Major general, USA (August 18, 1864) | | USMA, 1835 Received the Thanks of Congress (January 28, 1864) Namesake of Fort Meade, Maryland |
| Meagher, Thomas Francis | Brigadier general, USV (February 3, 1862) | | Resigned May 14, 1863, resignation rejected Resigned May 15, 1865 |
| Meigs, Montgomery Cunningham | Brigadier general, USA (May 15, 1861) | Major general, USA (July 5, 1864) | USMA, 1836 Quartermaster General (1861–1882) |
| Meredith, Solomon | Brigadier general, USV (October 6, 1862) | Major general, USV (August 14, 1865) | |
| Meredith, Sullivan Amory | Brigadier general, USV (November 29, 1862) | | |
| Merritt, Wesley | Captain, USA (1862) Major general, USV (April 1, 1865) | Major general, USA (1865) | USMA, 1860 Superintendent, USMA (1882–1887) Military Governor of the Philippines (1898) |
| Miles, Nelson Appleton | Major general, USV (October 21, 1865) | | MOH, Battle of Chancellorsville (May 2–3, 1863) Last General-in-Chief (1895–1902); position replaced with Chief of Staff upon his retirement Military Governor of Puerto Rico (1898) Commander-in-chief, MOLLUS (1919–1925) Last surviving Major General (d. May 15, 1925) |
| Miller, John Franklin | Brigadier general, USV (January 5, 1864) | Major general, USV (March 13, 1865) | U.S. Senator from California (1881–1886) |
| Miller, Stephen | Brigadier general, USV (October 26, 1863) | | Resigned January 18, 1864 Governor of Minnesota (1864–1865) |
| Milroy, Robert Huston | Major general, USV (November 29, 1862) | | |
| Mitchel, Ormsby MacKnight | Major general, USV (April 11, 1862) | | USMA, 1829 Died of yellow fever, October 30, 1862 |
| Mitchell, John Grant | Brigadier general, USV (January 12, 1865) | Major general, USV (March 13, 1865) | Resigned July 3, 1865 |
| Mitchell, Robert Byington | Brigadier general, USV (April 8, 1862) | | Territorial Governor of New Mexico (1866–1869) |
| Montgomery, William Reading | Brigadier general, USV (May 17, 1861) | | USMA, 1825 Resigned April 4, 1864 |
| Morell, George Webb | Brigadier general, USV (August 9, 1861) | | USMA, 1835 Appointment as major general, USV (July 4, 1862) expired March 4, 1863 Mustered out December 15, 1864 |
| Morgan, Charles Hale | Captain, USA (August 5, 1861) Brigadier general, USV (May 21, 1865) | | USMA, 1857 |
| Morgan, Edwin Denison | Major general, USV (September 28, 1861) | | Resigned January 1, 1863 First (and longest-sitting) Chairman of the Republican National Committee (1856–1864, 1872–1876) Governor of New York (1859–1862) U.S. Senator from New York (1863–1869) |
| Morgan, George Washington | Brigadier general, USV (November 21, 1861) | Brigadier general, USA (1848) | USMA (class of 1845), resigned 1843 Resigned volunteer commission June 8, 1863 U.S. minister to Portugal (1858–1861) U.S. Congressman from Ohio (1869-1869, 1871–1873) |
| Morgan, James Dada | Brigadier general, USV (July 17, 1862) | Major general, USV (March 19, 1865) | |
| Morris, William Hopkins | Brigadier general, USV (November 29, 1862) | Major general, USV (March 13, 1865) | USMA, 1851 |
| Morton, James St. Clair | Major, USA (July 3, 1863) Brigadier general, USV (November 29, 1862) | | USMA, 1851 Resigned volunteer commission November 7, 1863 KIA, Siege of Petersburg (July 17, 1864) |
| Mott, Gershom | Major general, USV (May 26, 1865) | | |
| Mower, Joseph Anthony | Major general, USV (August 12, 1864) | Major general, USA (March 13, 1865) | |

### N

| Name | Substantive Rank | Brevet Rank | Notes |
| Nagle, James | Brigadier general, USV (March 13, 1863) | | Original appointment as brigadier general, USV (September 10, 1862) expired March 4, 1863 due to lack of Senate confirmation Resigned, May 9, 1863 Recommissioned as Colonel (July 4, 1863 – August 2, 1863) Recommissioned again as Colonel (1864) Resigned, November 5, 1864 |
| Naglee, Henry Morris | Brigadier general, USV (February 12, 1862) | | USMA, 1835 Relieved, September 23, 1863 Mustered out, April 4, 1864 |
| Negley, James S. | Major general, USV (November 29, 1862) | | Relieved, September, 1864 Resigned, January 19, 1865 U.S. Congressman from Pennsylvania (1869–1887) |
| Neill, Thomas Hewson | Major, USA Brigadier general, USV (November 29, 1863) | Brigadier general, USA Major general, USV | USMA, 1847 Superintendent, USMA (1876–1879) |
| Nelson, William | Major general, USV (July 17, 1862) | | Only naval officer in either army to reach major general Shot and killed in a private altercation by Brigadier General Jefferson C. Davis (September 29, 1862) |
| Newton, John | Colonel, USA Major general, USV (March 30, 1863) | Major general, USA (March 13, 1865) Major general, USA (March 13, 1865) | USMA, 1842 son of Congressman Thomas Newton, Jr. Volunteer rank revoked April 18, 1864 |
| Nickerson, Franklin Stillman | Brigadier general, USV (November 29, 1862) | | Relieved, July 22, 1864 Resigned May 13, 1865 |

### O

| Name | Substantive Rank | Brevet Rank | Notes |
| Oglesby, Richard James "Uncle Dick" | Major general, USV (November 29, 1862) | | Resigned, May 26, 1864 Governor of Illinois (1865–1869, 1873, 1885–1889) U.S. Senator from Illinois (1873–1879) Present at the deathbed of Abraham Lincoln |
| Oliver, John Morrison | Brigadier general, USV (January 12, 1865) | Major general, USV | |
| Opdycke, Emerson (b. Opdycke, Samuel Emerson) | Brigadier general, USV (July 26, 1865) | Major general, USV (March 13, 1865) | Postwar appointment, resigned January 1, 1866 before Senate confirmation February 23, 1866 Warner, Eicher list |
| Ord, Edward Otho Cresap | Colonel, USA Major general, USV (May 3, 1862) | | USMA, 1839 |
| Orme, William Ward | Brigadier general, USV (November 29, 1862) | | Resigned, April 20, 1864 |
| Osborn, Thomas Ogden | Brigadier general, USV (May 1, 1865) | Major general, USV | U.S. minister to Argentina (1874–1885) |
| Osterhaus, Peter Joseph | Major general, USV (July 23, 1864) | | |
| Owen, Joshua Thomas | Brigadier general, USV (November 29, 1862) | | Commission never confirmed by Senate, expired March 4, 1863 Relieved of duty, June, 1864 Mustered out, July, 1864 |

### P

| Name | Substantive Rank | Brevet Rank | Notes |
| Paine, Charles Jackson | Brigadier general, USV (July 4, 1864) | Major general, USV (March 13, 1865) | |
| Paine, Eleazar Arthur | Brigadier general, USV (September 3, 1861) | | USMA, 1839 Resigned April 5, 1865 Cousin of Halbert Eleazer Paine |
| Paine, Halbert Eleazer | Brigadier general, USV (April 9, 1863) | | Resigned May 15, 1865 U.S. Congressman from Wisconsin (1865–1871) Cousin of Eleazer Arthur Paine |
| Palmer, Innis Newton | Lieutenant colonel, USA (1863) Brigadier general, USV (September 23, 1861) | Brigadier general, USA Major general, USV | USMA, 1846 |
| Palmer, John McCauley | Major general, USV (November 29, 1862) | | Governor of Illinois (1869–1873) U.S. Senator from Illinois (1891–1897) Commander-in-chief, GAR (1891–1892) |
| Parke, John Grubb | Major general, USV (July 18, 1862) | Major general, USA | USMA, 1849 Superintendent, USMA (1887–1889) |
| Parsons, Lewis Baldwin | Brigadier general, USV (May 11, 1865) | Major general, USV | |
| Patrick, Marsena Rudolph | Brigadier general, USV (March 20, 1862) | Major general, USV (March 13, 1865) | USMA, 1835 |
| Patterson, Francis Engle | Brigadier general, USV (April 11, 1862) | | "Killed by accidental discharge of his own pistol" (November 22, 1862) Son of Robert Patterson Brother-in-law of John Joseph Abercrombie |
| Patterson, Robert | Major general, Pennsylvania Volunteers | Mexican-American War veteran Returned to duty with PA volunteers | Commanded Department of Pennsylvania Failed to retake Harpers Ferry or stop Stonewall Jackson move; Discharged July, 1861 Father of Francis E. Patterson; Father-in-law of John Joseph Abercrombie |
| Paul, Gabriel René | Brigadier general, USA (February 16, 1865) Brigadier general, USV (April 18, 1863) | | USMA, 1834 Retired February 16, 1865, due to blinding at Battle of Gettysburg (July 1, 1863) Original appointment as brigadier general, USV (September 5, 1862) not confirmed, expired March 4, 1863 |
| Peck, John James | Major general, USV (July 4, 1862) | | USMA, 1843 |
| Pennypacker, Galusha | Brigadier general, USV (February 18, 1865) | Major general, USV (March 13, 1865) | MOH, Battle of Fort Fisher (January 15, 1865) Youngest general in U.S. history |
| Penrose, William Henry | First Lieutenant, USA (May 14, 1861) Brigadier general, USV (July 27, 1865) | | Postwar appointment, nominated January 13, 1866 confirmed February 23, 1866; Warner, Eicher list |
| Phelps, John Smith | Brigadier general, USV (July 19, 1862) | | Appointment expired March 4, 1863 U.S. Congressman from Missouri (1845–1863) Military Governor of Arkansas (1862–1863) Governor of Missouri (1877–1881) |
| Phelps, John Wolcott | Brigadier general, USV (May 17, 1861) | | Resigned, August 21, 1862) USMA, 1836 Half-brother of Charles Edward Phelps |
| Piatt, Abram Sanders (aka Piatt, Abraham Sanders) | Brigadier general, USV (April 30, 1862) | | Resigned February 17, 1863 |
| Pierce, Byron Root | Brigadier general, USV (June 7, 1864) | Major general, USV (March 13, 1865) | |
| Pile, William Anderson | Brigadier general, USV (December 26, 1863) | Major general, USV (April, 1865) | U.S. Congressman from Missouri (1867–1869) Territorial Governor of New Mexico (1869–1871) U.S. minister to Venezuela (1871–1874) |
| Pitcher, Thomas Gamble | Captain, USA (1858) Brigadier general, USV (November 29, 1862) | Brigadier general, USA (March 13, 1865) | USMA, 1845 Superintendent, USMA (1866–1870) |
| Pleasonton, Alfred | Major, USA (1862) Major general, USV (June 22, 1863) | Major general, USA (March 13, 1865) | USMA, 1844 |
| Plummer, Joseph Bennett | Major, USA (April, 1862) Brigadier general, USV (October 27, 1861) | | USMA, 1841 Died "Of Wound and Exposure in the Active Field", August 9, 1862 |
| Poe, Orlando Metcalfe | Captain, USA Brigadier general, USV (November 29, 1862) | Brigadier general, USA (March 13, 1865) | USMA, 1856 Volunteer appointment expired March 4, 1863, not confirmed |
| Pope, John | Brigadier general, USA (July 14, 1862) Major general, USV (March 21, 1862) | | USMA, 1842 Brother-in-law of Force, Manning Ferguson |
| Porter, Andrew | Colonel, USA (May 14, 1861) Brigadier general, USV (May 18, 1861) | | Mustered out of volunteer service April 4, 1864 Resigned regular commission April 20, 1864 USMA (class of 1844), resigned in 1840 Cousin of Horace Porter First cousin (once removed) of Mary Todd Lincoln |
| Porter, Fitz John | Colonel, USA (1861) Major general, USV (July 4, 1862) | Brigadier general, USA (1862) | USMA, 1845 Relieved September 5, 1862 court-martialed and convicted (January 10, 1863) Dismissed from service January 21, 1863 Exonerated March 19, 1879 Nephew of David Dixon Porter, USN and William David Porter, USN |
| Potter, Edward Elmer | Brigadier general, USV (November 29, 1862) | Major general, USV (March 13, 1865) | |
| Potter, Joseph Haydn | Major, USA (1863) Brigadier general, USV (May 1, 1865) | Brigadier general, USA (March 13, 1865) | USMA, 1843 |
| Potter, Robert Brown | Major general, USV (September 29, 1865) | | |
| Potts, Benjamin Franklin | Brigadier general, USV (January 12, 1865) | Major general, USV (March 13, 1865) | Territorial Governor of Montana (1870–1883) |
| Powell, William Henry | Brigadier general, USV (October 19, 1864) | Major general, USV (March 13, 1865) | MOH for actions at Sinking Creek (November 26, 1862) Resigned January 5, 1865 |
| Pratt, Calvin Edward | Brigadier general, USV (September 13, 1862) | | Resigned April 25, 1863 |
| Prentiss, Benjamin Mayberry | Major general, USV (November 29, 1862) | | Resigned October 28, 1863 |
| Prince, Henry | Major, USA (1855) Brigadier general, USV (April 20, 1862) | Brigadier general, USA (March 13, 1865) | USMA, 1835 |

### Q

| Image | Name | Substantive Rank | Brevet Rank | Notes |
| | Quinby, Isaac Ferdinand | Brigadier general, USV (March 17, 1862) | | USMA, 1843 Resigned, December 31, 1863 |

### R

| Name | Substantive Rank | Brevet Rank | Notes |
| Ramsay, George Douglas | Brigadier general, USA (September 15, 1863) | Major general, USA (March 13, 1865) | USMA, 1820 Retired September 12, 1864 Chief of Ordnance (1863–1864) |
| Ransom, Thomas Edward Greenfield | Brigadier general, USV (November 29, 1862) | Major general, USV (September 1, 1864) | Died October 29, 1864 |
| Raum, Green Berry | Brigadier general, USV (February 15, 1865) | | |
| Rawlins, John Aaron | Brigadier general, USA (March 3, 1865) | Major general, USA (April 9, 1865) Major general, USV (February 24, 1865) | Chief of Staff to General Ulysses S. Grant Secretary of War (1869) |
| Reid, Hugh Thompson | Brigadier general, USV (April 9, 1863) | | Resigned April 4, 1864 |
| Reilly, James William | Brigadier general, USV (July 30, 1864) | | Resigned April 20, 1865 |
| Reno, Jesse Lee | Captain, USA Major general, USV (July 18, 1862) | | USMA, 1846 KIA, Battle of South Mountain (September 14, 1862) |
| Revere, Joseph Warren | Brigadier general, USV (October 25, 1862) | | Forced to resign August 10, 1863 Grandson of Paul Revere Cousin of Paul Joseph Revere |
| Reynolds, John Fulton | Lieutenant colonel, USA (May 14, 1861) Major general, USV (November 29, 1862) | | USMA, 1841 Superintendent, USMA (1860–1861) KIA, Battle of Gettysburg (July 1, 1863) |
| Reynolds, Joseph Jones | Major general, USV (November 29, 1862) | | USMA, 1843 |
| Rice, Americus Vespucius | Brigadier general, USV (May 31, 1865) | | U.S. Congressman from Ohio (1875–1879) |
| Rice, Elliott Warren | Brigadier general, USV (June 22, 1864) | Major general, USV (March 13, 1865) | Brother of Samuel Allen Rice |
| Rice, James Clay | Brigadier general, USV (August 17, 1863) | | KIA, Battle of Spotsylvania (May 10, 1864) |
| Rice, Samuel Allen | Brigadier general, USV (August 4, 1863) | | DOW, Battle of Jenkins' Ferry (w. April 30, 1864, d. July 6, 1864) Brother of Elliott Warren Rice |
| Richardson, Israel Bush | Major general, USV (July 4, 1862) | | USMA, 1841 DOW, Battle of Antietam (w. September 17, 1862, d. November 3, 1862) |
| Ricketts, James Brewerton | Major, USA Brigadier general, USV (July 21, 1861) | Major general, USA (March 13, 1865) Major general, USV (August 1, 1864) | USMA, 1839 |
| Ripley, James Wolfe | Brigadier general, USA (August 3, 1861) | Major general, USA (March 13, 1865) | USMA, 1814 Chief of Ordnance (1861–1863) Uncle of General Roswell Sabine Ripley, CSA |
| Roberts, Benjamin Stone | Major, USA (May 13, 1861) Brigadier general, USV (July 16, 1862) | Brigadier general, USA (March 13, 1865) Major general, USV (March 13, 1865) | USMA, 1835 |
| Robinson, James Sidney | Brigadier general, USV (January 12, 1865) | | U.S. Congressman from Ohio (1881–1885) |
| Robinson, John Cleveland | Captain, USA Brigadier general, USV (April 28, 1862) | Major general, USA Major general, USV | MOH, Battle of Laurel Hill (May 8, 1864) USMA (class of 1839), dismissed 1836 Commander-in-chief, GAR (1877–1879) |
| Rodman, Isaac Peace | Brigadier general, USV (April 28, 1862) | | DOW, Battle of Antietam (w. September 17, 1862, d. September 30, 1862) |
| Rosecrans, William Starke | Brigadier general, USA (May 16, 1861) Major general, USV (March 21, 1862) | | USMA, 1842 Rejected original appointment as major general, USV (September 17, 1862) Received the Thanks of Congress (March 3, 1863) U.S. minister to Mexico (1868–1869) U.S. Congressman from California (1881–1885) |
| Ross, Leonard Fulton | Brigadier general, USV (April 26, 1862) | | Resigned July 22, 1863 |
| Rousseau, Lovell Harrison | Major general, USV (October 8, 1862) | | U.S. Congressman from Kentucky (1865–1866, 1866–1867) Father-in-law of Louis Douglass Watkins |
| Rowley, Thomas Algeo | Brigadier general, USV (November 29, 1862) | | Convicted by Court-martial (April 23, 1864) for actions at the Battle of Gettysburg. Conviction overturned by Secretary of War Edwin Stanton Resigned December 29, 1864 |
| Rucker, Daniel Henry | Major, USA (August, 1861) Brigadier general, USV (May 23, 1863) | Major general, USA (March 13, 1865) Major general, USV (March 13, 1865) | Quartermaster General of the United States Army (1882) |
| Ruger, Thomas Howard | Brigadier general, USV (November 29, 1862) | Major general, USV (November 30, 1864) | USMA, 1854 Military Governor of Georgia (1868) Superintendent, USMA (1871–1876) |
| Russell, David Allen | Major, USA (1862) Brigadier general, USV (November 29, 1862) | Major general, USA | USMA, 1845 KIA, Battle of Opequon (September 19, 1864) |
| Rutherford, Friend Smith | Colonel, USV (Sept. 1862) Brigadier general, USV (June 27, 1864) | | Died from disease on June 20, 1864 after resigning his commission 5 days earlier. Brother to Bvt. Brigadiers George V. Rutherford and Reuben C. Rutherford. |

### S

| Name | Substantive Rank | Brevet Rank | Notes |
| Salomon, Frederick (aka Salomon, Friedrich) | Brigadier general, USV (July 16, 1862) | Major general, USV (March 13, 1865) | Brother of Wisconsin Governor Edward Salomon |
| Sanborn, John Benjamin | Brigadier general, USV (August 4, 1863) | Major general, USV (February 10, 1865) | |
| Sanders, William Price | Captain, USA (May 14, 1861) Colonel, USV (March 4, 1863) | | USMA, 1856 Appointed brig. gen., USV (October 18, 1863), not confirmed by U.S. Senate. Listed as a "might have been" by Eicher, 2001, pp. 609-610 because not confirmed Warner, 1964, pp. 419-420 lists him as a brig. gen. DOW, Siege of Knoxville (w. November 18, 1863, d. November 19, 1863) |
| Saxton, Rufus | Captain, USA (May 13, 1861) Brigadier general, USV (April 15, 1862) | Brigadier general, USA (April 9, 1865) Major general, USV (January 12, 1865) | USMA, 1849 MOH for defense of Harper's Ferry during Jackson's Valley Campaign (May 26–30, 1862) |
| Scammon, Eliakim Parker | Brigadier general, USV (October 15, 1862) | | USMA, 1837 |
| Schenck, Robert Cumming | Major general, USV (August 30, 1862) | | Resigned December 5, 1863 U.S. Congressman from Ohio (1843–1851, 1863–1871) U.S. minister to Brazil (1851–1853) U.S. minister to the Court of St. James (1871–1876) |
| Schimmelfennig, Alexander | Brigadier general, USV (November 29, 1862) | | Died of tuberculosis September 5, 1865 |
| Schoepf, Albin Francisco | Brigadier general, USV (September 30, 1861) | | |
| Schofield, John McAllister | Brigadier general, USA (November 30, 1864) Major general, USV (November 29, 1862) | Major general, USA (March 13, 1865) | USMA, 1853 MOH, Battle of Wilson's Creek (August 10, 1861) Secretary of War (1868–1869) Superintendent, USMA (1876–1881) General-in-Chief of the U.S. Army (1888–1895) Commander-in-chief, MOLLUS (1899–1903) |
| Schurz, Carl | Major general, USV (March 14, 1863) | | Resigned May 6, 1865 U.S. minister to Spain (1861) U.S. Senator from Missouri (1869–1875) Secretary of the Interior (1877–1881) |
| Scott, Robert Kingston | Brigadier general, USV (January 12, 1865) | Major general, USV (December 5, 1865) | Governor of South Carolina (1868–1872) |
| Scott, Winfield | Major general, USA (June 25, 1841) | Lieutenant general, USA (March 29, 1847) | Retired November 1, 1861 General-in-Chief (1841–1861) Twice received the Congressional Gold Medal (November 3, 1814; March 9, 1848) Author of the Anaconda Plan |
| Sedgwick, John | Colonel, USA (April 25, 1861) Major general, USV (July 4, 1862) | | USMA, 1837 KIA, Battle of Spotsylvania Court House (May 9, 1864) Highest-ranked Union general KIA |
| Seward, William Henry, Jr. | Brigadier general, USV (September 13, 1864) | | Resigned June 1, 1865 Son of Secretary of State William Henry Seward |
| Seymour, Truman | Captain, USA (November 22, 1860 Brigadier general, USV (April 28, 1862) | Major general, USA (March 13, 1865) Major general, USV (March 13, 1865) | USMA, 1846 |
| Shackelford, James Murrell | Brigadier general, USV (January 2, 1863) | | Resigned January 18, 1864 |
| Shaler, Alexander | Brigadier general, USV (May 26, 1863) | Major general, USV (July 27, 1863) | MOH, Second Battle of Fredericksburg (May 3, 1863) |
| Shepard, Isaac Fitzgerald | Brigadier general, USV (October 27, 1863) | | Not confirmed; appointment expired July 4, 1864 |
| Shepley, George Foster | Brigadier general, USV (July 18, 1862) | | Resigned July 1, 1865 Military Governor of Louisiana (1862–1864) |
| Sheridan, Philip Henry | Major general, USA (November 8, 1864) | | USMA, 1853 Received the Thanks of Congress (February 9, 1865) General-in-Chief (1883–1888) Commander-in-chief, MOLLUS (1886–1888) |
| Sherman, Francis Trowbridge | Brigadier general, USV (July 21, 1865) | | |
| Sherman, Thomas West | Lieutenant colonel, USA (May 14, 1861) Brigadier general, USV (May 17, 1861) | Major general, USA (March 13, 1865) Major general, USV (March 13, 1865) | USMA, 1836 |
| Sherman, William Tecumseh | Major general, USA (August 12, 1864) | | USMA, 1841 Twice received the Thanks of Congress (February 19, 1864; January 19, 1865) General-in-Chief (1869–1883) |
| Shields, James | Brigadier general, USV (August 19, 1861) | | Resigned March 28, 1863 U.S. Senator from Illinois (1849–1855) U.S. Senator from Minnesota (1858–1859) U.S. Senator from Missouri (1879) |
| Sibley, Henry Hastings | Brigadier general, USV (March 20, 1863) | Major general, USV (November 29, 1865) | Original appointment as brig. gen., USV (September 29, 1862) expired March 4, 1863 Congressional Delegate from the Wisconsin Territory (1848–1849) Congressional Delegate from the Minnesota Territory (1849–1853) 1st Governor of Minnesota (1858–1860) |
| Sickles, Daniel Edgar | Major general, USV (November 29, 1862) | | MOH, Battle of Gettysburg (July 2, 1863) U.S. Congressman from New York (1857–1861, 1893–1895) U.S. minister to Spain (1869–1874) |
| Sigel, Franz | Major general, USV (March 21, 1862) | | Resigned May 4, 1865 |
| Sill, Joshua Woodrow | Brigadier general, USV (July 16, 1862) | | USMA, 1853 KIA, Battle of Stones River (December 31, 1862) |
| Slack, James Richard | Brigadier general, USV (November 10, 1864) | Major general, USV (March 13, 1865) | |
| Slemmer, Adam Jacoby | Lieutenant colonel, USA (February 8, 1864) Brigadier general, USV (November 29, 1862) | Brigadier general, USA (March 13, 1865) | USMA, 1850 |
| Slocum, Henry Warner | Major general, USV (July 4, 1862) | | USMA, 1852 Resigned September 28, 1865 U.S. Congressman from New York (1869–1973, 1883–1885) |
| Slough, John Potts | Brigadier general, USV (August 25, 1862) | | |
| Smith, Andrew Jackson | Lieutenant colonel, USA *May 9, 1864) Major general, USV (May 12, 1864) | Major general, USA (March 13, 1865) | USMA, 1838 |
| Smith, Charles Ferguson | Colonel, USA (September 9, 1861) Major general, USV (March 21, 1862) | | USMA, 1825 Died from infection April 25, 1862 |
| Smith, Giles Alexander | Major general, USV (November 24, 1865) | | Brother of Morgan Lewis Smith Last Major General of volunteers by seniority |
| Smith, Green Clay | Brigadier general, USV (June 11, 1862) | Major general, USV (March 13, 1865) | Resigned December 4, 1863 U.S. Congressman from Kentucky (1863–1866) Territorial Governor of Montana (1866–1869) |
| Smith, Gustavus Adolphus | Brigadier general, USV (September 19, 1862) | Brigadier general, USV (March 13, 1865) | Not confirmed; appointment expired March 4, 1863 |
| Smith, John Eugene | Brigadier general, USV (November 29, 1862) | Major general, USV (January 12, 1865) | |
| Smith, Morgan Lewis (aka Sanford, Martin L.) | Brigadier general, USV (July 16, 1862) | | Resigned July 12, 1865 Brother of Giles Alexander Smith |
| Smith, Thomas Church Haskell | Brigadier general, USV (November 29, 1862) | | |
| Smith, Thomas Kilby | Brigadier general, USV (August 11, 1863) | Major general, USV (March 13, 1865) | |
| Smith, William Farrar | Major (March 3, 1863) Major general, USV (March 9, 1864) | Major general, USA (March 13, 1865) | USMA, 1845 Original appointment as major general, USV (July 4, 1862) expired March 4, 1863 |
| Smith, William Sooy | Brigadier general, USV (April 15, 1862) | | Resigned July 15, 1864 |
| Smyth, Thomas Alfred | Brigadier general, USV (October 1, 1864) | Major general, USV (April 7, 1865) | DOW, Battle of Cumberland Church (w. April 7, 1865, d. April 9, 1865) Last Union general killed during the war |
| Spears, James Gallant | Brigadier general, USV (March 5, 1862) | | Arrested February 6, 1864 for insubordination; Court-martialed and dismissed from service August 30, 1864 |
| Spinola, Francis Barretto | Brigadier general, USV (October 1, 1862) | | Resigned June 8, 1865 U.S. Congressman from New York (1887–1893) |
| Sprague, John Wilson | Brigadier general, USV (July 30, 1864) | Major general, USV (March 13, 1865) | MOH, Battle of Atlanta (July 22, 1864) |
| Stahel, Julius (b. Stahel-Számwald, Julius H.) | Major general, USV (March 14, 1863) | | MOH, Battle of Piedmont (June 5, 1864) Resigned February 8, 1865 |
| Stanley, David Sloane | Major, USA (December 1, 1863) Major general, USV (November 29, 1862) | Major general, USA (March 13, 1865) | USMA, 1852 MOH, Battle of Franklin (November 30, 1864) |
| Stannard, George Jerrison | Brigadier general, USV (March 11, 1863) | Major general, USV (October 28, 1864) | |
| Starkweather, John Converse | Brigadier general, USV (July 17, 1863) | | Resigned May 11, 1865 |
| Stedman, Griffin Alexander, Jr. | Colonel, USV (September 17, 1862) | Brigadier general, USV August 5, 1864 | DOW, Siege of Petersburg (w. August 5, 1864, d. August 6, 1864) |
| Steedman, James Blair | Major general, USV (April 20, 1864) | | |
| Steele, Frederick | Lieutenant Colonel (August 26, 1863) Major general, USV (November 29, 1862) | Major general, USA (March 13, 1865) | USMA, 1843 |
| Stevens, Isaac Ingalls | Major general, USV (July 4, 1862) | | USMA, 1839 KIA, Battle of Chantilly (September 1, 1862) Territorial Governor of Washington (1853–1857) Congressional Delegate for the Washington Territory (1857–1861) Father of Hazard Stevens |
| Stevenson, John Dunlap | Brigadier general, USV (November 29, 1862) | Major general, USV (March 13, 1865) | Resigned April 22, 1864 Reappointed brigadier general, USV August 7, 1864 |
| Stevenson, Thomas Greely | Brigadier general, USV (March 14, 1863) | | KIA, Battle of Spotsylvania Court House (May 10, 1864) Original appointment as brigadier general, USV (December 24, 1862) expired March 4, 1863 |
| Stokes, James Hughes | Brigadier general, USV (July 20, 1865) | | USMA, 1835; postwar appointment but listed by Eicher and Warner |
| Stolbrand, Charles John (b. Möller, Carl Johan; later: Ståhlbrand, Carl Johan) | Brigadier general, USV (February 18, 1865) | | |
| Stone, Charles Pomeroy | Colonel, USA (May 14, 1861) Brigadier general, USV (May 17, 1861) | | USMA, 1845 Mustered out of volunteer service April 4, 1864 Resigned September 13, 1864 |
| Stoneman, George | Lieutenant colonel, USA (March 30, 1864) Major general, USV (November 29, 1862) | Major general, USA (March 13, 1865) | USMA, 1846 Governor of California (1883–1887) |
| Stoughton, Edwin Henry | Brigadier general, USV (November 5, 1862) | | USMA, 1859 Not confirmed, appointment expired March 4, 1863 Captured by John S. Mosby |
| Strong, George Crockett | Captain, USA (March 3, 1863) Major general, USV (July 18, 1863) | | USMA, 1857 DOW, Second Battle of Fort Wagner (w. July 18, 1863, d. July 30, 1863) |
| Strong, William Kerley | Brigadier general, USV (September 28, 1861) | | Appointed brig. gen., USV by President Abraham Lincoln, September 28, 1861 Command of Benton Barracks, Districts of Cairo and St Louis. Resigned his commission on October 20, 1863. |
| Stuart, David | Brigadier general, USV (November 29, 1862) | | Not confirmed, appointment expired March 4, 1863 Resigned April 3, 1863 U.S. Congressman from Michigan (1853–1855) |
| Sturgis, Samuel Davis | Lieutenant colonel, USA (October 27, 1863) Brigadier general, USV (October 10, 1861) | Major general, USA (March 13, 1865) | USMA, 1846 |
| Sullivan, Jeremiah Cutler | Brigadier general, USV (April 28, 1862) | |
| Sully, Alfred | Major, USA (March 15, 1862) Brigadier general, USV (September 26, 1862) | Brigadier general, USA (March 13, 1865) Major general, USV (March 8, 1865) | USMA, 1841 |
| Sumner, Edwin Vose | Brigadier general, USA (March 16, 1861) Major general, USV (July 4, 1862) | Major general, USA (May 31, 1862) | Died of a heart attack March 21, 1863 |
| Swayne, Wager | Major general, USV (June 20, 1865) | | MOH, Second Battle of Corinth (October 4, 1862) Last Major General of volunteers appointed (May 1, 1866) Son of Supreme Court Justice Noah Haynes Swayne |
| Sweeny, Thomas William | Major, USA (October 20, 1863) Brigadier General USV (November 29, 1862) | | |
| Sykes, George | Lieutenant colonel, USA (October 16, 1863) Major general, USV (November 29, 1862) | Major general, USA (March 13, 1865) | USMA, 1838 |

### T

| Name | Substantive Rank | Brevet Rank | Notes |
| Taylor, George William | Brigadier general, USV (May 9, 1862) | | DOW, Bull Run Bridge (w. August 27, 1862, d. September 1, 1862) |
| Taylor, Joseph Pannell | Brigadier general, USA (February 9, 1863) | | Commissary General of the Army (1861–1864) Died June 29, 1864 Brother of President Zachary Taylor Uncle of generals Richard Taylor, CSA and David Rumph Jones, CSA Father of John McLean Taylor Father-in-law of Albert Gallatin Lawrence |
| Taylor, Nelson | Brigadier general, USV (September 7, 1862) | | Resigned January 19, 1863 Appointment withdrawn February 12, 1865 Warner lists; Eicher lists as "might have been" U.S. Congressman from New York (1865–1867) |
| Terrill, William R. | Captain, USA (May 14, 1861) Brigadier general, USV (September 9, 1862) | | USMA, 1853 KIA, Battle of Perryville (October 8, 1862) Brother of Confederate general James Barbour Terrill |
| Terry, Alfred Howe | Brigadier general, USA (January 15, 1865) Major general, USV (January 16, 1865) | | Received the Thanks of Congress (January 24, 1865) |
| Terry, Henry Dwight | Brigadier general, USV (July 17, 1862) | | Resigned February 7, 1865 |
| Thayer, John Milton | Brigadier general, USV (March 13, 1863) | Major general, USV (March 13, 1865) | Original appointment as brig. gen. USV expired March 4, 1863 Territorial Governor of Wyoming (1875–1878) Governor of Nebraska (1887–1891). Remained in office until February 8, 1892, claiming successor was not a U.S. citizen |
| Thayer, Sylvanus | Colonel, USA | Brigadier general, USA (May 31, 1863) | Retired June 1, 1863 Superintendent, USMA (1817–1833) Longest-serving West Point superintendent Oldest officer brevetted brigadier general |
| Thomas, George Henry | Major general, USA (January 16, 1865) | | USMA, 1840 Received the Thanks of Congress (March 3, 1865) |
| Thomas, Henry Goddard | Captain, USA Brigadier general, USV (November 30, 1864) | Brigadier general, USA (March 13, 1865) Major general, USV (March 13, 1865) | |
| Thomas, Lorenzo | Brigadier general, USA (August 3, 1861) | Major general, USA March 13, 1865 | USMA, 1823 Adjutant General of the Army (1861–1869) |
| Thomas, Stephen | Brigadier general, USV (February 1, 1865) | | MOH, Battle of Cedar Creek (October 19, 1864) Mustered out as colonel, USV (January 21, 1865) |
| Thruston, Charles Mynn | Brigadier general, USV (September 7, 1861) | | USMA, 1814 Not confirmed, appointment withdrawn at own request, February 27, 1862. Resigned April 17, 1862 |
| Tibbits, William B. | Brigadier general, USV (October 18, 1865) | Major general, USV (March 13, 1865) |
| Tillson, Davis | Brigadier general, USV (November 29, 1862) | | USMA (class of 1853); left due to amputation of leg, 1851 |
| Todd, John Blair Smith | Brigadier general, USV (September 19, 1861) | | USMA, 1837 Appointment as brig. gen., USV expired June 17, 1862 Delegate to Congress for Dakota Territory (1861–1863, 1864–1865) Cousin of Mary Todd Lincoln |
| Torbert, Alfred Thomas Archimedes | Captain, USA (September 25, 1861) Brigadier general, USV (November 29, 1862) | Major general, USA (March 13, 1865) Major general, USV (March 13, 1865) | USMA, 1855 Also nominated, confirmed as 1st lt., CSA refused appointment |
| Totten, Joseph Gilbert | Brigadier general, USA (March 3, 1863) | Major general, USA (1864) | USMA, 1805 (tenth graduate of West Point) Chief of Engineers (1838–1864) Died of pneumonia (April 22, 1864) |
| Tower, Zealous Bates | Lieutenant colonel, USA (November, 1865) Brigadier general, USV (November 23, 1861) | Major general, USA (March 13, 1865) Major general, USV (March 13, 1865) | USMA, 1841 Superintendent, USMA (July, 1864-September, 1864) |
| Turchin, John Basil (b. Turchaninov, Ivan Vasilyevich) | Brigadier general, USV (July 17, 1862) | | Resigned October 4, 1864 Only general officer on either side from Russia |
| Turner, John Wesley | Colonel, USA Brigadier general, USV (September 7, 1863) | Major general, USA (March 13, 1865) Major general, USV (1864) | USMA, 1855 |
| Tuttle, James Madison | Brigadier general, USV (June 9, 1862) | | Resigned June 14, 1864 |
| Tyler, Daniel | Brigadier general, USV (March 13, 1862) | | Resigned April 6, 1864 Uncle of Robert Ogden Tyler |
| Tyler, Erastus B. | Brigadier general, USV (May 14, 1862) | Major general, USV (March 13, 1865) | |
| Tyler, Robert Ogden | Major, USA Brigadier general, USV (November 29, 1862) | Major general, USV (1864) Major general, USA (March 13, 1865) | USMA, 1853 Nephew of Daniel Tyler |
| Tyndale, Hector (b. Tyndale, George Hector) | Brigadier general, USV (April 9, 1863) | Major general, USV (March 13, 1865) | Resigned August 26, 1864 |

### U

| Name | Substantive Rank | Brevet Rank | Notes |
| Ullmann, Daniel | Brigadier general, USV (January 13, 1863) | Major general, USV (March 13, 1865) | |
| Underwood, Adin Ballou | Brigadier general, USV (November 6, 1863) | Major general, USV (August, 1865) | |
| Upton, Emory | Captain, USA Brigadier general, USV (May 12, 1864) | Major general, USA Major general, USV | USMA, 1861 Superintendent, USMA (1870–1875) One of only two general officers ever promoted on the field by General Grant |

### V

| Name | Substantive Rank | Brevet Rank | Notes |
| Van Alen, James Henry | Brigadier general, USV (April 15, 1862) | | Resigned July 14, 1863 |
| Van Cleve, Horatio Phillips | Brigadier general, USV (March 21, 1862) | Major general, USV (March 13, 1865) | USMA, 1831 |
| Van Derveer, Ferdinand | Brigadier general, USV (October 4, 1864) | | Resigned June 7, 1865 |
| Van Vliet, Stewart | Major, USA (August, 1861) Brigadier general, USV (March 13, 1865) | Brigadier general, USA (October, 1864) Major general, USV (March 13, 1865) | USMA, 1840 Earlier appointment as brigadier general, USV (September 23, 1861) expired July 17, 1862 |
| Van Wyck, Charles H. | Brigadier general, USV (September 27, 1865) | | U.S. Congressman from New York (1859–1863, 1867–1871) U.S. Senator from Nebraska (1881–1887) |
| Vandever, William | Brigadier General (November 29, 1862) | Major general, USV (June, 1865) | U.S. Congressman from Iowa (1859–1861) U.S. Congressman from California (1887–1891) |
| Veatch, James C. | Brigadier general, USV (April 28, 1862) | Major general, USV (1865) | |
| Viele, Egbert Ludovicus | Brigadier general, USV (August 17, 1861) | | USMA, 1847 Resigned October 23., 1863 U.S. Congressman from New York (1885–1887) |
| Vincent, Strong | Brigadier general, USV (July 3, 1863) | | DOW, Battle of Gettysburg (July 2, 1863, d. July 7, 1863) |
| Vinton, Francis Laurens | Captain, USA (October, 1861) Brigadier general, USV (March 13, 1863) | | USMA, 1856 Earlier appointment as brigadier general, USV (September 19, 1862) expired March 4, 1863 Resigned May 5, 1863 |
| Vogdes, Israel | Colonel, USA (1863) Brigadier general, USV (November 29, 1862) | Brigadier general, USA | USMA, 1837 |
| Von Steinwehr, Adolph Wilhelm August Friedrich, Baron | Brigadier general, USV (October 12, 1861) | Eicher lists as "Steinwehr" | Resigned July 3, 1865 |

### W

| Name | Substantive Rank | Brevet Rank | Notes |
| Wade, Melancthon Smith | Brigadier general, USV (October 1, 1861) | | Not confirmed, nomination rejected March 13, 1862 Warner includes as "mustered in" Eicher mentions nomination rejection Resigned March 18, 1862 |
| Wadsworth, James Samuel | Brigadier general, USV (August 9, 1861) | Major general, USV (May 6, 1864) | Full promotion to Major general, USV (May 5, 1864) posthumously revoked, brevet substituted DOW, Battle of the Wilderness (w. May 6, 1864, d. May 8, 1864) |
| Wagner, George Day | Brigadier general, USV (November 29, 1862) | | Relieved of duty at his own request, December 4, 1864 Mustered out August 24, 1865 |
| Walcutt, Charles C. | Brigadier general, USV (June 30, 1864) | Major general, USV (March 13, 1865) | |
| Wallace, Lewis "Lew" | Major general, USV (March 21, 1862) | | Commissioner on Lincoln assassination trial Territorial Governor of New Mexico (1878–1881) U.S. minister to the Ottoman Empire (1881–1885) |
| Wallace, William Harvey Lamme | Brigadier general, USV (March 21, 1862) | | DOW, Battle of Shiloh (w. April 7, 1862, d. April 10, 1862) |
| Ward, John Henry Hobart | Brigadier general, USV (October 4, 1862) | | Relieved May 12, 1864 Mustered out June 18, 1864 |
| Ward, William Thomas | Brigadier general, USV (September 18, 1861) | Major general, USV (February 24, 1865) | U.S. Congressman from Kentucky (1851–1853) |
| Warner, James Meech | Captain, USA (October 8, 1864) Brigadier general, USV (May 8, 1865) | Brigadier general, USA (March 13, 1865) | USMA, 1860 |
| Warren, Fitz Henry | Brigadier general, USV (July 16, 1862) | Major general, USV (August 24, 1865) | U.S. minister to Guatemala (1866–1869) |
| Warren, Gouverneur Kemble | Major, USA Major general, USV (May 3, 1863) | | USMA, 1850 Resigned volunteer commission May 27, 1865 |
| Washburn, Cadwallader Colden | Major general, USV (November 29, 1862) | | U.S. Congressman from Wisconsin (1855–1861, 1867–1871) Governor of Wisconsin (1871–1873) Brother of Illinois Congressman Elihu Benjamin Washburne |
| Washburn, Francis | Colonel, USV | Brigadier general, USV (April 6, 1865) | DOW, Battle of High Bridge (w. April 6, 1865, d. April 22, 1865) |
| Watkins, Louis Douglass | Captain, USA (July, 1862) Brigadier general, USV (September 25, 1865) | | Son-in-law of Lovell Harrison Rousseau |
| Webb, Alexander Stewart | Brigadier general, USV (June 23, 1863) | Major general, USA (March 13, 1865) Major general, USV (August 1, 1864) | MOH, Battle of Gettysburg (July 3, 1863) USMA, 1855 |
| Weber, Max (aka Von Weber, Max) | Brigadier general, USV (April 28, 1862) | | Resigned May 13, 1865 |
| Webster, Joseph Dana | Major, USA (July 1, 1861) Brigadier general, USV (November 29, 1862) | Major general, USV (March 13, 1865) | |
| Weed, Stephen Hinsdale | Captain, USA (May 14, 1861) Brigadier general, USV (June 6, 1863) | | USMA, 1854 KIA, Battle of Gettysburg appointed, not confirmed Warner lists, Eicher lists as "might have been" |
| Weitzel, Godfrey | Captain, USA Major general, USV (November 17, 1864) | | USMA, 1855 |
| Wells, William | Brigadier general, USV (May 19, 1865) | Major general, USV (March 13, 1865) | |
| Welsh, Thomas | Brigadier general, USV (March 13, 1863) | | Original appointment as brigadier general, USV (November 29, 1862) expired March 4, 1863 Died of malaria, August 14, 1863 |
| Wessells, Henry Walton | Colonel, USA (1865) Brigadier general, USV (April 25, 1862) | Brigadier general, USA | USMA, 1833 |
| West, Joseph Rodman | Brigadier general, USV (October 25, 1862) | Major general, USV (January 4, 1866) | U.S. Senator from Louisiana (1871–1877) |
| Wheaton, Frank | First Lieutenant, USA (1855) Brigadier general, USV (November 29, 1862) | Major general, USA Major general, USV | Son-in-law of Adjutant General Samuel Cooper, CSA |
| Whipple, Amiel Weeks | Major general, USV (May 3, 1863) | Major general, USA (May 7, 1863) | USMA, 1841 DOW, Battle of Chancellorsville (w. May 4, 1863, d. May 7, 1863) |
| Whipple, William Denison | Colonel, USA Brigadier general, USV (July 17, 1863) | Major general, USA | USMA, 1851 |
| Whitaker, Walter Chiles | Brigadier general, USV (June 25, 1863) | Major general, USV (March 13, 1865) | |
| White, Julius | Brigadier general, USV (June 9, 1862) | Major general, USV (March 13, 1865) | Resigned November 19, 1864 |
| Wild, Edward Augustus | Brigadier general, USV (April 24, 1863) | | |
| Willcox, Orlando Bolivar | Brigadier general, USV (July 21, 1861) | Major general, USA Major general, USV | MOH First Battle of Bull Run (July 21, 1861) USMA, 1847 |
| Williams, Alpheus Starkey | Brigadier general, USV (May 17, 1861) | Major general, USV (January 12, 1866) | U.S. Congressman from Michigan (1875–1879) |
| Williams, David Henry | Brigadier general, USV (November 29, 1862) | | Not confirmed, appointment expired March 4, 1863 |
| Williams, Nelson Grosvenor | Brigadier general, USV (November 29, 1862) | | USMA (class of 1843), withdrew July, 1840 Resigned November 27, 1862 Appointment after resignation "Negated" by U.S. Senate March 9, 1863 |
| Williams, Seth | Lieutenant colonel, USA (July 7, 1862) Brigadier general, USV (September 23, 1861) | Brigadier general, USA (March 13, 1865) Major general, USV (March 13, 1865) | USMA, 1842 |
| Williams, Thomas | Major, USA (May 14, 1861) Brigadier general, USV (September 28, 1861) | | USMA, 1837 KIA, Battle of Baton Rouge (August 5, 1862) |
| Williamson, James Alexander | Brigadier general, USV (January 13, 1865) | Major general, USV (March 13, 1865) | MOH, Battle of Chickasaw Bayou (December 29, 1862) |
| Willich, August (b. Von Willich, August) | Brigadier general, USV (July 17, 1862) | Major general, USV (October 21, 1865) | |
| Wilson, James Harrison | First Lieutenant, USA (1861) Major general, USV (May 6, 1865) | Major general, USA | USMA, 1860 |
| Wistar, Isaac Jones | Brigadier general, USV (November 29, 1862) | | Resigned September 15, 1864 |
| Wood, Thomas John | Colonel, USA (1861) Major general, USV (January 27, 1865) | | USMA, 1845 |
| Woodbury, Daniel Phineas | Lieutenant colonel, USA (1861) Brigadier general, USV (March 19, 1862) | Major general, USA (August 15, 1864) | USMA, 1836 Died of yellow fever (August 15, 1864) |
| Woods, Charles Robert | Captain (April 1, 1861) Brigadier general, USV (August 4, 1863) | Major general, USA (March 13, 1865) Major general, USV (November 22, 1864) | USMA, 1852 Brother of William Burnham Woods Brother-in-law of Willard Warner |
| Woods, William Burnham | Brigadier general, USV (May 31, 1865) | Major general, USV (March 13, 1865) | Associate Justice of the Supreme Court (1880–1887) Brother of Charles Robert Woods Brother-in-law of Willard Warner |
| Wool, John Ellis | Major general, USA (May 16, 1862) | | Retired August 1, 1863 Oldest Civil War general in active service (b. February 29, 1784) |
| Wright, George | Colonel, USA (1855) Brigadier general, USV (September 28, 1861) | | USMA, 1822 Died in the wreck of the steamer Brother Jonathan (June 30, 1865) |
| Wright, Horatio Gouverneur | Major, USA (August, 1861) Major general, USV (May 12, 1864) | Major general, USA (March 13, 1865) | USMA, 1841 Original appointment as major general, USV (July 18, 1862) expired March 4, 1863 |

### Y

| Image | Name | Substantive Rank | Brevet Rank | Notes |

### Z

| Image | Name | Substantive Rank | Brevet Rank | Notes |
| | Zook, Samuel Kosciuszko | Brigadier general, USV (November 29, 1862) | Major general, USV (July 3, 1863) | DOW, Battle of Gettysburg (July 2, 1863, d. July 3, 1863) |