# 1858–59 United States House of Representatives elections

The 1858–59 United States House of Representatives elections were held on various dates in various states between June 7, 1858, and December 1, 1859. Each state set its own date for its elections to the House of Representatives. 238 representatives were elected in the new state of Oregon, the pending new state of Kansas, and the other 32 states before the first session of the 36th United States Congress convened on December 5, 1859. They were held during President James Buchanan's term.
Winning a plurality for the first time, the Republicans benefited from multiple factors. These factors included the collapse of the nativist American Party, sectional strife in the Democratic Party, Northern voter dissatisfaction with the Supreme Court's March 1857 Dred Scott decision, political exposure of Democrats to chaotic violence in Kansas amid repeated attempts to impose slavery against the express will of a majority of its settlers, and a sharp decline in President Buchanan's popularity due to his perceived fecklessness. In Pennsylvania, his home state, Republicans made particularly large gains.
The pivotal Dred Scott decision was only the second time the Supreme Court had overturned an Act of Congress on Constitutional grounds, after Marbury v. Madison. The decision created apprehension in the Northern United States, where slavery had ceased to exist, that the Supreme Court would strike down any limitations on slavery anywhere in the United States with a ruling in Lemmon v. New York.
Short of a majority, Republicans controlled the House with limited cooperation from smaller parties also opposing the Democrats. Republicans were united in opposing slavery in the territories and fugitive slave laws, while rejecting the abrogation of the Missouri Compromise, key aspects of the Compromise of 1850, the Kansas–Nebraska Act, and the Dred Scott decision. Though not yet abolitionist, Republicans openly derived a primary partisan purpose from hostility to slavery while furnishing a mainstream platform for abolitionism. None of the party's views or positions was new. However, their catalytic cohesion into a unified political vehicle, and the bold dismissal of the South, represented a newly disruptive political force.
Democrats remained divided and politically trapped. Fifteen Democratic members publicly defied their party label. Of seven Independent Democrats, six represented Southern districts. Eight Northern anti-Lecompton Democrats favored a ban on slavery in Kansas, effectively upholding the Missouri Compromise their party had destroyed several years earlier. Democrats lacked credible leadership and continued to drift in a direction favorable to the interests of slavery despite obviously widening and intensifying Northern opposition to the expansion of those interests. A damaging public perception also existed that President Buchanan had improperly influenced and endorsed the Dred Scott decision, incorrectly believing that it had solved his main political problem. Such influence would violate the separation of powers. The wide gap between Democratic rhetoric and results alienated voters, while defeat in the North and intra-party defection combined to make the party both more Southern and more radical.
Democrats lost seats in some slave states as the disturbing turn of national events and surge in sectional tensions alarmed a significant minority of Southern voters. Southern politicians opposing both Democrats and extremism, but unwilling to affiliate with Republicans, ran on the Southern Opposition Party ticket (not to be conflated with the Opposition Party of 1854).
For 11 states, this was the last full congressional election until the Reconstruction. Twenty-nine elected members quit near the end of the session following their states' secession from the Union, whose immediate motivation was the result of the presidential election of 1860.

## Election summaries

One seat each was added for the new states of Oregon and Kansas.
| 98 | 5 | 19 | 116 |
| Democratic | KN | Opp. | Republican |
| State | Type | Date | Total seats | Democratic | Democratic | Know Nothing | Know Nothing | Opposition | Opposition | Republican | Republican |
| State | Type | Date | Total seats | Seats | Change | Seats | Change | Seats | Change | Seats | Change |
| Oregon | At-large | June 7, 1858 | 1 | 1 | 1 | 0 | | 0 | | 0 | |
| Arkansas | Districts | August 2, 1858 | 2 | 2 | | 0 | | 0 | | 0 | |
| Missouri | Districts | August 2, 1858 | 7 | 5 | | 1 | 1 | 0 | | 1 | 1 |
| Vermont | Districts | September 7, 1858 | 3 | 0 | | 0 | | 0 | | 3 | |
| Maine | Districts | September 13, 1858 | 6 | 0 | | 0 | | 0 | | 6 | |
| Florida | At-large | October 4, 1858 | 1 | 1 | | 0 | | 0 | | 0 | |
| South Carolina | Districts | October 10–11, 1858 | 6 | 6 | | 0 | | 0 | | 0 | |
| Indiana | Districts | October 12, 1858 | 11 | 4 | 2 | 0 | | 0 | | 7 | 2 |
| Iowa | Districts | October 12, 1858 | 2 | 0 | | 0 | | 0 | | 2 | |
| Ohio | Districts | October 12, 1858 | 21 | 6 | 3 | 0 | | 0 | | 15 | 3 |
| Pennsylvania | Districts | October 12, 1858 | 25 | 5 | 10 | 0 | | 0 | | 20 | 10 |
| Delaware | At-large | November 2, 1858 (Election Day) | 1 | 1 | | 0 | | 0 | | 0 | |
| Illinois | Districts | November 2, 1858 (Election Day) | 9 | 5 | | 0 | | 0 | | 4 | |
| Massachusetts | Districts | November 2, 1858 (Election Day) | 11 | 0 | | 0 | | 0 | | 11 | |
| Michigan | Districts | November 2, 1858 (Election Day) | 4 | 0 | | 0 | | 0 | | 4 | |
| New Jersey | Districts | November 2, 1858 (Election Day) | 5 | 2 | 1 | 0 | | 0 | | 3 | 1 |
| New York | Districts | November 2, 1858 (Election Day) | 33 | 7 | 5 | 0 | | 0 | | 26 | 5 |
| Wisconsin | Districts | November 2, 1858 (Election Day) | 3 | 1 | 1 | 0 | | 0 | | 2 | 1 |
| Late elections (after the March 4, 1859 beginning of the term) ||||||||||||
| New Hampshire | Districts | March 8, 1859 | 3 | 0 | | 0 | | 0 | | 3 | |
| Connecticut | Districts | April 4, 1859 | 4 | 0 | 2 | 0 | | 0 | | 4 | 2 |
| Rhode Island | Districts | April 7, 1859 | 2 | 0 | | 0 | | 0 | | 2 | |
| Virginia | Districts | May 26, 1859 | 13 | 12 | 1 | 0 | | 1 | 1 | 0 | |
| Alabama | Districts | August 1, 1859 | 7 | 7 | | 0 | | 0 | | 0 | |
| Kentucky | Districts | August 1, 1859 | 10 | 5 | 3 | 0 | 2 | 5 | 5 | 0 | |
| Texas | Districts | August 1, 1859 | 2 | 2 | | 0 | | 0 | | 0 | |
| North Carolina | Districts | August 4, 1859 | 8 | 4 | 3 | 0 | 1 | 4 | 4 | 0 | |
| Tennessee | Districts | August 4, 1859 | 10 | 3 | 4 | 0 | 3 | 7 | 7 | 0 | |
| California | At-large | September 7, 1859 | 2 | 2 | | 0 | | 0 | | 0 | |
| Georgia | Districts | October 3, 1859 | 8 | 6 | | 0 | 2 | 2 | 2 | 0 | |
| Mississippi | Districts | October 3, 1859 | 5 | 5 | | 0 | | 0 | | 0 | |
| Minnesota | At-large | October 4, 1859 | 2 | 0 | 2 | 0 | | 0 | | 2 | 2 |
| Louisiana | Districts | November 7, 1859 | 4 | 3 | | 1 | | 0 | | 0 | |
| Maryland | Districts | November 8, 1859 | 6 | 3 | | 3 | | 0 | | 0 | |
| Kansas | At-large | December 1, 1859 | 1 | 0 | | 0 | | 0 | | 1 | 1 |
| Total | Total | Total | 238 | 98 41.4% | 35 | 5 2.1% | 9 | 19 8.0% | 19 | 116 48.5% | 26 |
Popular vote
Democratic
48.06%
Republican
36.59%
Opposition
5.04%
Know Nothing
3.53%
Whig
0.87%
Independent
6.91%
Others
0.00% :
House seats
Republican
47.28%
Democratic
34.72%
Opposition
7.95%
Know Nothing
2.09%
Whig
1.67%
Independent
6.28% :

### Maps

* District results by vote share

## Special elections

There were special elections in 1858 and 1859 to the 35th United States Congress and 36th United States Congress.
Special elections are sorted by date then district.

### 35th Congress

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Massachusetts 7 | Nathaniel P. Banks | Republican | 1852 | Incumbent resigned December 24, 1857 to become Governor of Massachusetts. New member elected in December 1857 or January 1858 and seated January 21, 1858. Republican hold. Winner had already been elected to the next term; see below. | ▌Y Daniel W. Gooch (Republican) [data missing] |
| North Carolina 8 | Thomas L. Clingman | Democratic | 1852 | Incumbent resigned May 7, 1858 to become U.S. Senator. New member elected August 5, 1858 and seated December 7, 1858. Know Nothing gain. Winner later elected to the next term; see below. | ▌Y Zebulon Vance (Know Nothing) 57.02% ▌William W. Avery (Democratic) 42.98% |
| Mississippi 5 | John A. Quitman | Democratic | 1855 | Incumbent died July 17, 1858. New member elected October 4, 1858 and seated December 7, 1858. Democratic hold. Winner later elected to the next term; see below. | ▌Y John J. McRae (Democratic) 99.08% Scattering 0.92% |
| Pennsylvania 8 | J. Glancy Jones | Democratic | 1850 | Incumbent resigned October 30, 1858. New member elected November 30, 1858 and seated December 7, 1858. Republican gain. Winner was not elected to the next term; see below. | ▌Y William H. Keim (Republican) 51.98% ▌Joel B. Warner (Democratic) 48.02% |
| Illinois 6 | Thomas L. Harris | Democratic | 1854 | Incumbent died November 24, 1858. New member elected January 4, 1859 and seated January 20, 1859. Democratic hold. Winner was not elected to the next term; see below. | ▌Y Charles D. Hodges (Democratic) 61.31% ▌James C. Conkling (Republican) 38.69% |
| New York 4 | John Kelly | Democratic | 1854 | Incumbent resigned December 25, 1858. New member elected January 4, 1859 and seated January 17, 1859. Independent Democratic gain. Winner was also elected to the next term; see below. | ▌Y Thomas J. Barr (Ind. Democratic) 96.89% Scattering 3.11% |

### 36th Congress

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Ohio 14 | Cyrus Spink | Republican | 1858 | Incumbent died May 31, 1859. New member elected October 11, 1859 and seated December 5, 1859. Republican hold. | ▌Y Harrison G. O. Blake (Republican) 56.17% ▌Neal Power (Democratic) 43.83% |
| Virginia 4 | William Goode | Democratic | 1853 | Incumbent died May 31, 1859. New member elected October 27, 1859 and seated December 7, 1859. Democratic hold. | ▌Y Roger Pryor (Democratic) ▌Thomas F. Goode (Democratic) |
| Illinois 6 | Thomas L. Harris | Democratic | 1854 | Incumbent died November 24, 1858. New member elected November 8, 1859 and seated December 5, 1859. Democratic hold. | ▌Y John A. McClernand (Democratic) 58.94% ▌John M. Palmer (Republican) 41.06% |

## Alabama

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Alabama 1 | James A. Stallworth | Democratic | 1857 | Incumbent re-elected. | ▌Y James A. Stallworth (Democratic) 63.32% ▌F. B. Shepard (Opposition) 36.68% |
| Alabama 2 | Eli S. Shorter | Democratic | 1855 | Incumbent retired. New member elected. | ▌Y James L. Pugh (Democratic) ▌J. E. Sappington (Opposition) Incomplete Data |
| Alabama 3 | James F. Dowdell | Democratic | 1853 | Incumbent retired. New member elected. | ▌Y David Clopton (Democratic) 50.79% ▌Thomas J. Judge (Opposition) 49.21% |
| Alabama 4 | Sydenham Moore | Democratic | 1857 | Incumbent re-elected. | ▌Y Sydenham Moore (Democratic) ▌William Russell Smith (Unknown) Incomplete Data |
| Alabama 5 | George S. Houston | Democratic | 1841 1849 (retired) 1851 | Incumbent re-elected. | ▌Y George S. Houston (Democratic) 58.12% ▌William A. Hewlett (Independent Democrat) 41.88% |
| Alabama 6 | Williamson R. W. Cobb | Democratic | 1847 | Incumbent re-elected. | ▌Y Williamson R. W. Cobb (Democratic) 54.98% ▌Alex Snodgrass (Democratic) 20.26% ▌Edwin Wallace (Democratic) 18.09% ▌Henry R. Beaver (Democratic) 6.68% |
| Alabama 7 | Jabez L. M. Curry | Democratic | 1857 | Incumbent retired. Democratic hold. | ▌Y Jabez L. M. Curry (Democratic) Unopposed |

## Arkansas

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Arkansas 1 | Alfred B. Greenwood | Democratic | 1853 | Incumbent retired. Democratic hold. | ▌Y Thomas C. Hindman (Democratic) 86.48% ▌William Crosby (American) 13.52% |
| Arkansas 2 | Albert Rust | Democratic | 1854 | Incumbent re-elected. | ▌Y Albert Rust (Democratic) 70.32% ▌Thomas S. Drew (Ind. Democratic) 15.10% ▌James A. Jones (American) 13.58% |

## California

California held its election September 7, 1859. From statehood to 1864, California's members were elected at-large, with the top finishers winning election.
| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| California at-large 2 seats on a general ticket | Charles L. Scott | Democratic | 1856 | Incumbent re-elected. | Elected on a general ticket: ▌Y John C. Burch (Lecompton Democratic) 56.88% ▌Y Charles L. Scott (Lecompton Democratic) 55.89% ▌Joseph C. McKibbin (Anti-Lecompton Democratic; Republican) 43.01% ▌Edward D. Baker (Republican; Anti-Lecompton Democratic) 41% ▌S. A. Booker (Anti-Lecompton Democratic) 2.94% ▌P. H. Sibley (Republican) 0.29% |
| California at-large 2 seats on a general ticket | Joseph C. McKibbin | Anti-Lecompton Democratic | 1856 | Incumbent lost re-election. Democratic hold. | Elected on a general ticket: ▌Y John C. Burch (Lecompton Democratic) 56.88% ▌Y Charles L. Scott (Lecompton Democratic) 55.89% ▌Joseph C. McKibbin (Anti-Lecompton Democratic; Republican) 43.01% ▌Edward D. Baker (Republican; Anti-Lecompton Democratic) 41% ▌S. A. Booker (Anti-Lecompton Democratic) 2.94% ▌P. H. Sibley (Republican) 0.29% |

## Connecticut

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Connecticut 1 | Ezra Clark Jr. | Republican | 1855 | Incumbent lost renomination. Republican hold. | ▌Y Dwight Loomis (Republican) 49.61% ▌Alvan P. Hyde (Democratic) 49.29% ▌Ezra Clark Jr. (Independent) 1.1% |
| Connecticut 2 | Samuel Arnold | Democratic | 1857 | Incumbent lost re-election. Republican gain. | ▌Y John Woodruff (Republican) 50.56% ▌Samuel Arnold (Democratic) 49.03% ▌Austin Baldwin (Unknown) 0.41% |
| Connecticut 3 | Sidney Dean | Republican | 1855 | Incumbent retired. Republican hold. | ▌Y Alfred A. Burnham (Republican) 51.74% ▌Rufus L. Baker (Democratic) 46.95% ▌Sidney Dean (Independent) 1.31% |
| Connecticut 4 | William D. Bishop | Democratic | 1857 | Incumbent lost re-election. Republican gain. | ▌Y Orris S. Ferry (Republican) 51.27% ▌William D. Bishop (Democratic) 48.73% |

## Delaware

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Delaware at-large | William G. Whiteley | Democratic | 1856 | Incumbent re-elected. | ▌Y William G. Whiteley (Democratic) 51.36% ▌ William H. Morris (People's) 48.64% |

## Florida

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Florida at-large | George S. Hawkins | Democratic | 1856 | Incumbent re-elected. | ▌Y George S. Hawkins (Democratic) 62.43% ▌John Westcott (Ind. Democratic) 37.57% |

## Georgia

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Georgia 1 |
| Georgia 2 |
| Georgia 3 |
| Georgia 4 |
| Georgia 5 |
| Georgia 6 |
| Georgia 7 |
| Georgia 8 |

## Illinois

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Illinois 1 |
| Illinois 2 |
| Illinois 3 |
| Illinois 4 |
| Illinois 5 |
| Illinois 6 |
| Illinois 7 |
| Illinois 8 |
| Illinois 9 |

## Indiana

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Indiana 1 |
| Indiana 2 |
| Indiana 3 |
| Indiana 4 |
| Indiana 5 |
| Indiana 6 |
| Indiana 7 |
| Indiana 8 |
| Indiana 9 |
| Indiana 10 |
| Indiana 11 |

## Iowa

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Iowa 1 |
| Iowa 2 |

## Kansas

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Kansas at-large | New state | New state | New state | New seat. New member elected December 1, 1859 in advance of January 29, 1861 statehood. Republican gain. | ▌Y Martin F. Conway (Republican) 57.74% ▌John A. Halderman (Democratic) 42.26% |

## Kansas Territory

See non-voting delegates, below.

## Kentucky

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Kentucky 1 |
| Kentucky 2 |
| Kentucky 3 |
| Kentucky 4 |
| Kentucky 5 |
| Kentucky 6 |
| Kentucky 7 |

## Louisiana

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Louisiana 1 | George Eustis Jr. | Know Nothing | 1854 | Incumbent retired. Know Nothing hold. | ▌Y John Edward Bouligny (American) 49.55% ▌Emile La Sére (Democratic) 40.18% ▌Charles Bienvenu (Unknown) 10.27% |
| Louisiana 2 | Miles Taylor | Democratic | 1854 | Incumbent re-elected. | ▌Y Miles Taylor (Democratic) 56.99% ▌L. D. Nichols (Know Nothing) 43.01% |
| Louisiana 3 | Thomas G. Davidson | Democratic | 1854 | Incumbent re-elected. | ▌Y Thomas G. Davidson (Democratic) 89.25% ▌T. Cannon (American) 10.75% |
| Louisiana 4 | John M. Sandidge | Democratic | 1854 | Incumbent retired. Democratic hold. | ▌Y John M. Landrum (Democratic) 74.42% ▌M. A. Jones (American) 25.58% |

## Maine

Elections held September 13, 1858.
| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Maine 1 | John M. Wood | Republican | 1854 | Incumbent retired. Republican hold. | ▌Y Daniel E. Somes (Republican) 50.57% ▌Ira T. Drew (Democratic) 48.36% ▌Manassah H. Smith (Democratic) 1.06% |
| Maine 2 | Charles J. Gilman | Republican | 1856 | Incumbent retired. Republican hold. | ▌Y John J. Perry (Republican) 54.53% ▌David B. Hastings (Democratic) 45.47% |
| Maine 3 | Nehemiah Abbott | Republican | 1856 | Incumbent retired. Republican hold. | ▌Y Ezra B. French (Republican) 50.18% ▌Alfred W. Johnson (Democratic) 49.82% |
| Maine 4 | Freeman H. Morse | Republican | 1856 | Incumbent re-elected. | ▌Y Freeman H. Morse (Republican) 60.15% ▌Asa Gile (Democratic) 39.85% |
| Maine 5 | Israel Washburn Jr. | Republican | 1850 | Incumbent re-elected. | ▌Y Israel Washburn Jr. (Republican) 55.72% ▌ James S. Wiley (Democratic) 44.28% |
| Maine 6 | Stephen C. Foster | Republican | 1856 | Incumbent re-elected. | ▌Y Stephen C. Foster (Republican) 51.53% ▌Bion Bradbury (Democratic) 48.47% |

## Maryland

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Maryland 1 |
| Maryland 2 |
| Maryland 3 |
| Maryland 4 |
| Maryland 5 |
| Maryland 6 |

## Massachusetts

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Massachusetts 1 |
| Massachusetts 2 |
| Massachusetts 3 |
| Massachusetts 4 |
| Massachusetts 5 |
| Massachusetts 6 |
| Massachusetts 7 |
| Massachusetts 8 |
| Massachusetts 9 |
| Massachusetts 10 |
| Massachusetts 11 |

## Michigan

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Michigan 1 | William A. Howard | Republican | 1854 | Incumbent lost re-election. Democratic gain. | ▌Y George B. Cooper (Democratic) 50.14% ▌William A. Howard (Republican) 49.86% |
| Michigan 1 | William A. Howard | Republican | 1854 | Election successfully contested. Incumbent re-seated May 15, 1860. | ▌Y William A. Howard (Republican) 51.03% ▌George B. Cooper (Democratic) 48.97% |
| Michigan 2 | Henry Waldron | Republican | 1854 | Incumbent re-elected. | ▌Y Henry Waldron (Republican) 59.11% ▌Consider A. Stacy (Democratic) 40.89% |
| Michigan 3 | David S. Walbridge | Republican | 1854 | Incumbent retired. Republican hold. | ▌Y Francis W. Kellogg (Republican) 55.73% ▌Thomas B. Church (Democratic) 44.27% |
| Michigan 4 | Dewitt C. Leach | Republican | 1856 | Incumbent re-elected. | ▌Y Dewitt C. Leach (Republican) 51.97% ▌Robert W. Davis (Democratic) 48.03% |

## Minnesota

Minnesota became a new state in 1858 having already elected its first two members at-large in October 1857 to finish the current term. The state then held elections to the next term October 4, 1859.
| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Minnesota at-large 2 seats | James M. Cavanaugh | Democratic | 1857 | Incumbent lost re-election. Republican gain. | Elected on a general ticket: ▌Y Cyrus Aldrich (Republican) 55.08% ▌Y William Windom (Republican) 54.2% ▌James M. Cavanaugh (Democratic) 45.56% ▌Christopher C. Graham (Democratic) 45.16% |
| Minnesota at-large 2 seats | William Wallace Phelps | Democratic | 1857 | Unknown if incumbent retired or lost re-election. Republican gain. | Elected on a general ticket: ▌Y Cyrus Aldrich (Republican) 55.08% ▌Y William Windom (Republican) 54.2% ▌James M. Cavanaugh (Democratic) 45.56% ▌Christopher C. Graham (Democratic) 45.16% |

## Mississippi

Elections held late, on October 3, 1859.
| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Mississippi 1 | Lucius Q. C. Lamar | Democratic | 1857 | Incumbent re-elected. | ▌Y Lucius Q. C. Lamar (Democratic) 100% |
| Mississippi 2 | Reuben Davis | Democratic | 1857 | Incumbent re-elected. | ▌Y Reuben Davis (Democratic) 94.49% ▌G. Q. Martin (Opposition) 5.51% |
| Mississippi 3 | William Barksdale | Democratic | 1853 | Incumbent re-elected. | ▌Y William Barksdale (Democratic) 100% |
| Mississippi 4 | Otho R. Singleton | Democratic | 1857 | Incumbent re-elected. | ▌Y Otho R. Singleton (Democratic) 77.19% ▌Franklin Smith (Unionist Democratic) 22.81% |
| Mississippi 5 | John J. McRae | Democratic | 1858 (special) | Incumbent re-elected. | ▌Y John J. McRae (Democratic) 100% |

## Missouri

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Missouri 1 |
| Missouri 2 |
| Missouri 3 |
| Missouri 4 |
| Missouri 5 |
| Missouri 6 |
| Missouri 7 |

## Nebraska Territory

See non-voting delegates, below.

## New Hampshire

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| New Hampshire 1 |
| New Hampshire 2 |
| New Hampshire 3 |

## New Jersey

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| New Jersey 1 |
| New Jersey 2 |
| New Jersey 3 |
| New Jersey 4 |
| New Jersey 5 |

## New York

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| New York 1 |
| New York 2 |
| New York 3 |
| New York 4 |
| New York 5 |
| New York 6 |
| New York 7 |
| New York 8 |
| New York 9 |
| New York 10 |
| New York 11 |
| New York 12 |
| New York 13 |
| New York 14 |
| New York 15 |
| New York 16 |
| New York 17 |
| New York 18 |
| New York 19 |
| New York 20 |
| New York 21 |
| New York 22 |
| New York 23 |
| New York 24 |
| New York 25 |
| New York 26 |
| New York 27 |
| New York 28 |
| New York 29 |
| New York 30 |
| New York 31 |
| New York 32 |
| New York 33 |

## North Carolina

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| North Carolina 1 |
| North Carolina 2 |
| North Carolina 3 |
| North Carolina 4 |
| North Carolina 5 |
| North Carolina 6 |
| North Carolina 7 |
| North Carolina 8 |

## Ohio

Ohio elected its members October 12, 1858, netting a 3-seat Republican gain.
| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Ohio 1 | George H. Pendleton | Democratic | 1856 | Incumbent re-elected. | ▌Y George H. Pendleton (Democratic) 51.24% ▌Timothy C. Day (Opposition) 48.76% |
| Ohio 2 | William S. Groesbeck | Democratic | 1856 | Incumbent lost re-election. Republican gain. | ▌Y John A. Gurley (Republican) 52.58% ▌William S. Groesbeck (Democratic) 47.42% |
| Ohio 3 | Clement Vallandigham | Democratic | 1856 | Incumbent re-elected. | ▌Y Clement Vallandigham (Democratic) 50.48% ▌Lewis D. Campbell (Republican) 49.52% |
| Ohio 4 | Matthias H. Nichols | Republican | 1852 | Incumbent lost re-election. Democratic gain. | ▌Y William Allen (Democratic) 50.2% ▌Matthias H. Nichols (Republican) 49.8% |
| Ohio 5 | Richard Mott | Republican | 1854 | Incumbent retired. Republican hold. | ▌Y James M. Ashley (Republican) 51.16% ▌William Mungen (Democratic) 48.51% ▌ William A. Hunter (Unknown) 0.34% |
| Ohio 6 | Joseph R. Cockerill | Democratic | 1856 | Incumbent retired. Democratic hold. | ▌Y William Howard (Democratic) 51.58% ▌Reader W. Clarke (Republican) 45.82% ▌ William R. Arthur (American) 2.61% |
| Ohio 7 | Aaron Harlan | Republican | 1852 | Incumbent lost renomination. Republican hold. | ▌Y Thomas Corwin (Republican) 63.85% ▌Charles W. Blair (Democratic) 36.15% |
| Ohio 8 | Benjamin Stanton | Republican | 1854 | Incumbent re-elected. | ▌Y Benjamin Stanton (Republican) 59.52% ▌William Hubbard (Democratic) 40.48% |
| Ohio 9 | Lawrence W. Hall | Democratic | 1856 | Incumbent lost re-election. Republican gain. | ▌Y John Carey (Republican) 50.29% ▌Lawrence W. Hall (Democratic) 49.71% |
| Ohio 10 | Joseph Miller | Democratic | 1856 | Incumbent lost re-election. Republican gain. | ▌Y Carey A. Trimble (Republican) 55.04% ▌Joseph Miller (Democratic) 45.96% |
| Ohio 11 | Albert C. Thompson | Republican | 1854 | Incumbent retired. Democratic gain. | ▌Y Charles D. Martin (Democratic) 50.72% ▌Nelson H. Van Vorhes (Republican) 49.28% |
| Ohio 12 | Samuel S. Cox | Democratic | 1856 | Incumbent re-elected. | ▌Y Samuel S. Cox (Republican) 51.75% ▌Lucius Case (Democratic) 48.25% |
| Ohio 13 | John Sherman | Republican | 1854 | Incumbent re-elected. | ▌Y John Sherman (Republican) 57.05% ▌S. J. Patrick (Democratic) 42.95% |
| Ohio 14 | Philemon Bliss | Republican | 1854 | Incumbent retired. Republican hold. Successor died May 31, 1859, leading to a special election. | ▌Y Cyrus Spink (Republican) 56.33% ▌J. P. Jeffries (Democratic) 43.67% |
| Ohio 15 | Joseph Burns | Democratic | 1856 | Incumbent lost re-election. Republican gain. | ▌Y William Helmick (Republican) 50.65% ▌Joseph Burns (Democratic) 49.35% |
| Ohio 16 | Cydnor B. Tompkins | Republican | 1856 | Incumbent re-elected. | ▌Y Cydnor B. Tompkins (Republican) 52.65% ▌George W. Manypenny (Democratic) 47.01% ▌ Jonathan Swank (Independent) 0.34% |
| Ohio 17 | William Lawrence | Democratic | 1856 | Incumbent retired. Republican gain. | ▌Y Thomas C. Theaker (Republican) 50.32% ▌Benjamin T. Sprigg (Democratic) 49.68% |
| Ohio 18 | Benjamin F. Leiter | Republican | 1854 | Incumbent retired. Republican hold. | ▌Y Sidney Edgerton (Republican) 53.33% ▌J. L. Ranney (Democratic) 46.67% |
| Ohio 19 | Edward Wade | Republican | 1852 | Incumbent re-elected. | ▌Y Edward Wade (Republican) 64.57% ▌J. W. Gray (Democratic) 34.69% ▌ Irad Kelly (Independent) 0.75% |
| Ohio 20 | Joshua Reed Giddings | Republican | 1843 | Incumbent lost renomination. Republican hold. | ▌Y John Hutchins (Republican) 62.8% ▌David Tod (Democratic) 34.27% ▌ B. W. Richmond (Independent) 2.69% ▌ Josuha R. Giddings (Unknown) 0.24% |
| Ohio 21 | John Bingham | Republican | 1854 | Incumbent re-elected. | ▌Y John Bingham (Republican) 57.46% ▌Thomas Means (Democratic) 42.54% |

## Oregon
### 35th Congress

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Oregon at-large | New state | New state | New state | New seat. New member elected June 7, 1858. Democratic gain. Successor seated February 14, 1859. New member did not run for the next term. | ▌Y La Fayette Grover (Democratic) [data missing] |

### 36th Congress

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Oregon at-large | New state | New state | New state | New seat. Democratic hold. New member did not run for the current term. | ▌Y Lansing Stout (Democratic) 50.07% ▌David Logan (Republican) 49.93% |

## Pennsylvania

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Pennsylvania 1 | Thomas B. Florence | Democratic | 1850 | Incumbent re-elected. | ▌Y Thomas B. Florence (Democratic) 43.09% ▌John W. Ryan (People's) 41% ▌G. W. Nebinger (Anti-Lecompton Dem.) 15.42% ▌Marshall Sprogell (Know Nothing) 0.48% |
| Pennsylvania 2 | Edward Joy Morris | Republican | 1843 1844 (retired) 1856 | Incumbent re-elected. | ▌Y Edward Joy Morris (People's) 58.38% ▌George H. Martin (Democratic) 41.62% |
| Pennsylvania 3 | James Landy | Democratic | 1850 | Incumbent lost re-election. Republican gain. | ▌Y John P. Verree (People's) 54.24% ▌James Landy (Democratic) 45.35% ▌George W. Read (Know Nothing) 0.4% |
| Pennsylvania 4 | Henry M. Phillips | Democratic | 1856 | Incumbent lost re-election. Republican gain. | ▌Y William Millward (People's) 59.25% ▌Henry M. Phillips (Democratic) 39.21% ▌Jacob Broom (Know Nothing) 1.54% |
| Pennsylvania 5 | Owen Jones | Democratic | 1856 | Incumbent lost re-election. Republican gain. | ▌Y John Wood (People's) 57.37% ▌Owen Jones (Democratic) 42.63% |
| Pennsylvania 6 | John Hickman | Democratic | 1854 | Incumbent re-elected. | ▌Y John Hickman (Anti-Lecompton Dem.) 40.76% ▌Charles D. Manly (Democratic) 31.15% ▌John M. Broomall (People's) 28.09% |
| Pennsylvania 7 | Henry Chapman | Democratic | 1856 | Incumbent retired. Republican gain. | ▌Y Henry C. Longnecker (People's) 50.76% ▌Stokes L. Roberts (Democratic) 49.24% |
| Pennsylvania 8 | J. Glancy Jones | Democratic | 1850 1852 (retired) 1854 (special) | Incumbent lost re-election. Democratic hold. | ▌Y John Schwartz (Anti-Lecompton Dem.) 50.07% ▌J. Glancy Jones (Democratic) 49.94% |
| Pennsylvania 9 | Anthony E. Roberts | Republican | 1854 | Incumbent retired. Republican hold. | ▌Y Thaddeus Stevens (People's) 60% ▌James M. Hopkins (Democratic) 40% |
| Pennsylvania 10 | John C. Kunkel | Republican | 1854 | Incumbent retired. Republican hold. | ▌Y John W. Killinger (People's) 61.46% ▌Jacob Weidle (Democratic) 38.54% |
| Pennsylvania 11 | William L. Dewart | Democratic | 1856 | Incumbent lost re-election. Republican gain. | ▌Y James H. Campbell (People's) 47.2% ▌William L. Dewart (Democratic) 28.95% ▌Joseph W. Cake (Anti-Lecompton Dem.) 23.85% |
| Pennsylvania 12 | Paul Leidy | Democratic | 1857 (special) | Incumbent retired. Republican gain. | ▌Y George W. Scranton (People's) 61.89% ▌John McReynolds (Democratic) 38.11% |
| Pennsylvania 13 | William H. Dimmick | Democratic | 1856 | Incumbent re-elected. | ▌Y William H. Dimmick (Democratic) 54.95% ▌David K. Shoemaker (People's) 45.05% |
| Pennsylvania 14 | Galusha A. Grow | Republican | 1850 | Incumbent re-elected. | ▌Y Galusha A. Grow (People's) 76.87% ▌Joel Parkhurst (Democratic) 23.13% |
| Pennsylvania 15 | Allison White | Democratic | 1856 | Incumbent lost re-election. Republican gain. | ▌Y James T. Hale (People's) 55.69% ▌Allison White (Democratic) 44.31% |
| Pennsylvania 16 | John A. Ahl | Democratic | 1856 | Incumbent retired. Republican gain. | ▌Y Benjamin F. Junkin (People's) 50.13% ▌Henry L. Fisher (Democratic) 49.87% |
| Pennsylvania 17 | Wilson Reilly | Democratic | 1856 | Incumbent lost re-election. Republican gain. | ▌Y Edward McPherson (People's) 50.72% ▌Wilson Reilly (Democratic) 49.28% |
| Pennsylvania 18 | John R. Edie | Republican | 1854 | Incumbent retired. Republican hold. | ▌Y Samuel S. Blair (People's) 57.71% ▌Cyrus L. Pershing (Democratic) 42.29% |
| Pennsylvania 19 | John Covode | Republican | 1854 | Incumbent re-elected. | ▌Y John Covode (People's) 52.81% ▌Henry D. Foster (Democratic) 47.19% |
| Pennsylvania 20 | William Montgomery | Democratic | 1856 | Incumbent re-elected. | ▌Y William Montgomery (Democratic) 61.5% ▌Jonathan Knight (People's) 38.5% |
| Pennsylvania 21 | David Ritchie | Republican | 1852 | Incumbent retired. Republican hold. | ▌Y James K. Moorhead (People's) 57.27% ▌Andrew Burke (Democratic) 42.73% |
| Pennsylvania 22 | Samuel A. Purviance | Republican | 1854 | Incumbent retired. Republican hold. | ▌Y Robert McKnight (People's) 55.25% ▌Thomas Williams (Anti-Tax) 39.65% ▌John Birmingham (Democratic) 5.1% |
| Pennsylvania 23 | William Stewart | Republican | 1856 | Incumbent re-elected. | ▌Y William Stewart (People's) 64.02% ▌Jonathan N. McGuffin (Democratic) 35.98% |
| Pennsylvania 24 | James L. Gillis | Democratic | 1856 | Incumbent lost re-election. Republican gain. | ▌Y Chapin Hall (People's) 52.42% ▌James L. Gillis (Democratic) 47.58% |
| Pennsylvania 25 | John Dick | Republican | 1852 | Incumbent retired. Republican hold. | ▌Y Elijah Babbitt (People's) 60.73% ▌ James C. Crawford (Democratic) 39.27% |

## Rhode Island

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Rhode Island 1 | Nathan B. Durfee | Republican | 1855 | Incumbent retired. American/Republican gain. | First round: ▌Y Christopher Robinson (American; Republican) 49.29% ▌Y Thomas Davis (Republican) 31.4% ▌Olney Arnold (Democratic) 19.31% Runoff: ▌Y Christopher Robinson (American; Republican) 56.32% ▌Thomas Davis (Republican; Democratic) 43.68% |
| Rhode Island 2 | William D. Brayton | Republican | 1857 | Incumbent re-elected. | ▌Y William D. Brayton (Republican) 63.93% ▌Alfred Anthony (Democratic) 36.07% |

## South Carolina

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| South Carolina 1 | John McQueen | Democratic | 1849 (special) | Incumbent re-elected. | ▌Y John McQueen (Democratic) Incomplete Data |
| South Carolina 2 | William P. Miles | Democratic | 1856 | Incumbent re-elected. | ▌Y William P. Miles (Democratic) ▌James Gadsden (Unknown) Incomplete Data |
| South Carolina 3 | Laurence M. Keitt | Democratic | 1853 (special) | Incumbent re-elected. | ▌Y Laurence M. Keitt Incomplete Data |
| South Carolina 4 | Milledge L. Bonham | Democratic | 1857 (special) | Incumbent re-elected. | ▌Y Milledge L. Bonham (Democratic) 100.00% |
| South Carolina 5 | James Lawrence Orr | Democratic | 1848 | Incumbent retired. Democratic hold. | ▌Y John D. Ashmore (Democratic) 59.4% ▌Thomas O. Vernon (Unknown) 40.6% |
| South Carolina 6 | William W. Boyce | Democratic | 1853 | Incumbent re-elected. | ▌Y William W. Boyce (Democratic) 100.00% Unopposed and incomplete data |

## Tennessee

Elections held late, on August 4, 1859.
| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Tennessee 1 | Albert G. Watkins | Democratic | 1855 | Incumbent retired. Opposition gain. | ▌Y Thomas A. R. Nelson (Opposition) 50.19% ▌Landon C. Haynes (Democratic) 49.81% |
| Tennessee 2 | Horace Maynard | Know Nothing | 1857 | Incumbent re-elected as an Oppositionist. Opposition gain. | ▌Y Horace Maynard (Opposition) 55.01% ▌I. C. Ramsay (Democratic) 44.99% |
| Tennessee 3 | Samuel A. Smith | Democratic | 1853 | Incumbent lost re-election. Opposition gain. | ▌Y Reese B. Brabson (Opposition) 53.39% ▌Samuel A. Smith (Democratic) 46.61% |
| Tennessee 4 | John H. Savage | Democratic | 1855 | Incumbent lost re-election. Opposition gain. | ▌Y William B. Stokes (Opposition) 51.85% ▌John H. Savage (Democratic) 48.15% |
| Tennessee 5 | Charles Ready | Know Nothing | 1853 | Incumbent lost re-election as an independent. Opposition gain. | ▌Y Robert H. Hatton (Opposition) 53.48% ▌Charles Ready (Independent; Democratic) 46.52% |
| Tennessee 6 | George W. Jones | Democratic | 1842 | Incumbent retired. Democratic hold. | ▌Y James H. Thomas (Democratic) 97.82% ▌William H. Polk (Unknown) 2.18% |
| Tennessee 7 | John V. Wright | Democratic | 1855 | Incumbent re-elected. | ▌Y John V. Wright (Democratic) 77.58% ▌Theodore H. Gibbs (Opposition) 22.42% |
| Tennessee 8 | Felix Zollicoffer | Know Nothing | 1853 | Incumbent retired. Opposition gain. | ▌Y James M. Quarles (Opposition) 52.86% ▌Thomas Menees (Democratic) 47.14% |
| Tennessee 9 | John D. C. Atkins | Democratic | 1857 | Incumbent lost re-election. Opposition gain. | ▌Y Emerson Etheridge (Opposition) 50.02% ▌John D. C. Atkins (Democratic) 49.98% |
| Tennessee 10 | William T. Avery | Democratic | 1857 | Incumbent re-elected. | ▌Y William T. Avery (Democratic) 50.3% ▌John L. Sneed (Opposition) 47.71% ▌David M. Currin (Independent) 1.99% |

## Texas

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Texas 1 | John H. Reagan | Democratic | 1857 | Incumbent re-elected. | ▌Y John H. Reagan (Democratic) 89.11% ▌William Beck Ochiltree (Independent) 10.89% |
| Texas 2 | Guy M. Bryan | Democratic | 1857 | Incumbent retired. Independent Democratic gain. | ▌Y Andrew Jackson Hamilton (Ind. Democratic) 51.18% ▌Thomas Neville Waul (Democratic) 48.82% |

## Vermont

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Vermont 1 | E. P. Walton | Republican | 1856 | Incumbent re-elected. | ▌Y E. P. Walton (Republican) 73.5% ▌Charles G. Eastman (Democratic) 26.0% |
| Vermont 2 | Justin S. Morrill | Republican | 1854 | Incumbent re-elected. | ▌Y Justin S. Morrill (Republican) 70.5% ▌Epaphro B. Chase (Democratic) 29.2% |
| Vermont 3 | Homer E. Royce | Republican | 1856 | Incumbent re-elected. | ▌Y Homer E. Royce (Republican) 69.3% ▌William H. H. Bingham (Democratic) 30.6% |

## Virginia

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Virginia 1 | Muscoe R. H. Garnett | Democratic | 1856 (special) | Incumbent re-elected. | ▌Y Muscoe R. H. Garnett (Democratic) 100% |
| Virginia 2 | John Millson | Democratic | 1849 | Incumbent re-elected. | ▌Y John Millson (Democratic) 62.7% ▌[FNU] Pretlow (Opposition) 30.1% ▌[FNU] Chandler (Opposition) 5.2% ▌[FNU] Sykes (Opposition) 2.0% |
| Virginia 3 | John Caskie | Democratic | 1851 | Incumbent lost re-election. Independent Democratic gain. | ▌Y Daniel C. DeJarnette (Ind. Democratic) 50.5% ▌John Caskie (Democratic) 49.5% |
| Virginia 4 | William Goode | Democratic | 1841 1843 (retired) 1853 | Incumbent re-elected. | ▌Y William Goode (Democratic) 63.8% ▌William C. Flournoy (Ind. Democratic) 36.2% |
| Virginia 5 | Thomas S. Bocock | Democratic | 1847 | Incumbent re-elected. | ▌Y Thomas S. Bocock (Democratic) 88.8% ▌[FNU] Speed (Unknown) 9.9% ▌[FNU] Boisseau (Unknown) 1.4% |
| Virginia 6 | Paulus Powell | Democratic | 1849 | Incumbent lost re-election. Independent Democratic gain. | ▌Y Shelton Leake (Ind. Democratic) 59.2% ▌Paulus Powell (Democratic) 40.8% |
| Virginia 7 | William Smith | Democratic | 1841 (special) 1843 (lost) 1853 | Incumbent re-elected. | ▌Y William Smith (Democratic) 49.4% ▌Henry Wirtz Thomas (Opposition) 46.5% ▌Henry Shackleford (Ind. Democratic) 4.2% |
| Virginia 8 | Charles J. Faulkner | Democratic | 1851 | Incumbent lost re-election. Opposition gain. | ▌Y Alexander Boteler (Opposition) 50.6% ▌Charles J. Faulkner (Democratic) 49.4% |
| Virginia 9 | John Letcher | Democratic | 1851 | Incumbent retired. Independent Democratic gain. | ▌Y John T. Harris (Ind. Democratic) 52.2% ▌James H. Skinner (Democratic) 47.8% |
| Virginia 10 | Sherrard Clemens | Democratic | 1852 (special) 1852 (retired) 1857 | Incumbent re-elected. | ▌Y Sherrard Clemens (Democratic) 61.1% ▌Ralph L. Berkshire (Opposition) 38.9% |
| Virginia 11 | Albert G. Jenkins | Democratic | 1857 | Incumbent re-elected. | ▌Y Albert G. Jenkins (Democratic) 55.6% ▌James M. Laidley (Opposition) 44.4% |
| Virginia 12 | Henry A. Edmundson | Democratic | 1849 | Incumbent re-elected. | ▌Y Henry A. Edmundson (Democratic) 94.1% ▌William B. Preston (Opposition) 5.0% ▌Allen T. Caperton (Democratic) 1.0% |
| Virginia 13 | George W. Hopkins | Democratic | 1835 1847 (retired) 1857 | Incumbent retired. Independent Democratic gain. | ▌Y Elbert S. Martin (Ind. Democratic) 53.4% ▌Benjamin Rush Floyd (Democratic) 46.6% |

## Wisconsin

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Wisconsin 1 | John F. Potter | Republican | 1856 | Incumbent re-elected. | ▌Y John F. Potter (Republican) 56.4% ▌Beriah Brown (Democratic) 43.6% |
| Wisconsin 2 | Cadwallader C. Washburn | Republican | 1854 | Incumbent re-elected. | ▌Y Cadwallader C. Washburn (Republican) 54.3% ▌Charles Dunn (Democratic) 45.7% |
| Wisconsin 3 | Charles Billinghurst | Republican | 1854 | Incumbent lost re-election. Democratic gain. | ▌Y Charles H. Larrabee (Democratic) 51.0% ▌Charles Billinghurst (Republican) 49.0% |

## Non-voting delegates

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Delegate | Party | First elected | Results | Candidates |
| Kansas | Marcus J. Parrott | Republican | 1856 or 1857 | Incumbent re-elected in 1859. | ▌Y Marcus J. Parrott (Republican) ▌ Sanders W. Johnston (Democratic) |
| Nebraska | Fenner Ferguson | Independent Democratic | 1857 | Incumbent retired. New delegate elected October 11, 1859. Democratic gain. Election was later overturned due to a successful challenge by the loser. | ▌Y Experience Estabrook (Democratic) ▌Samuel Gordon Daily (Republican) |