# List of members of the United States House of Representatives in the 31st Congress by seniority

This is a complete list of members of the United States House of Representatives during the 31st United States Congress listed by seniority. As an historical article, the districts and party affiliations listed reflect those during the 31st Congress (March 4, 1849 – March 3, 1851). Current seats and party affiliations on the List of current members of the United States House of Representatives by seniority will be different for certain members.
Seniority depends on the date on which members were sworn into office. Since many members are sworn in on the same day, subsequent ranking is based on previous congressional service of the individual and then by alphabetical order by the last name of the congressman.
Committee chairmanship in the House is often associated with seniority. However, party leadership is typically not associated with seniority.
Note: The "*" indicates that the representative/delegate may have served one or more non-consecutive terms while in the House of Representatives of the United States Congress.

## U.S. House seniority list

U.S. House seniority :
| Rank | Representative | Party | District | Seniority date (Previous service, if any) | No.# of term(s) | Notes |
| 1 | Linn Boyd | D | KY-01 | March 4, 1839 Previous service, 1835–1837. | 07th term* | Dean of the House |
| 2 | Isaac E. Holmes | D | SC-06 | March 4, 1839 | 06th term | Left the House in 1851. |
| 3 | Jacob Thompson | D | MS-01 | March 4, 1839 | 06th term | Left the House in 1851. |
| 4 | John Reeves Jones Daniel | D | NC-06 | March 4, 1841 | 05th term |
| 5 | Robert C. Winthrop | W | MA-01 | November 29, 1842 Previous service, 1840–1842. | 07th term* | Resigned on July 30, 1850. |
| 6 | Joshua R. Giddings | W | OH-20 | December 5, 1842 Previous service, 1838–1842. | 08th term* |
| 7 | James B. Bowlin | D | MO-01 | March 4, 1843 | 04th term | Left the House in 1851. |
| 8 | Armistead Burt | D | SC-05 | March 4, 1843 | 04th term |
| 9 | Howell Cobb | D | GA-06 | March 4, 1843 | 04th term | Speaker of the House Left the House in 1851. |
| 10 | Andrew Johnson | D | TN-01 | March 4, 1843 | 04th term |
| 11 | George W. Jones | D | TN-05 | March 4, 1843 | 04th term |
| 12 | Hugh A. Haralson | D | GA-04 | March 4, 1843 | 04th term | Left the House in 1851. |
| 13 | Daniel P. King | W | MA-02 | March 4, 1843 | 04th term | Died on July 25, 1850. |
| 14 | George P. Marsh | W | VT-03 | March 4, 1843 | 04th term | Resigned sometime in 1849. |
| 15 | John A. McClernand | D | IL-02 | March 4, 1843 | 04th term | Left the House in 1851. |
| 16 | Julius Rockwell | W | MA-07 | March 4, 1843 | 04th term | Left the House in 1851. |
| 17 | Robert C. Schenck | W | OH-03 | March 4, 1843 | 04th term | Left the House in 1851. |
| 18 | Samuel Finley Vinton | W | OH-12 | March 4, 1843 Previous service, 1823–1837. | 11th term* | Left the House in 1851. |
| 19 | John Wentworth | D | IL-04 | March 4, 1843 | 04th term | Left the House in 1851. |
| 20 | Joseph A. Woodward | D | SC-03 | March 4, 1843 | 04th term |
| 21 | Alexander H. Stephens | W | GA-07 | October 2, 1843 | 04th term |
| 22 | Joseph Grinnell | W | MA-10 | December 7, 1843 | 04th term | Left the House in 1851. |
| 23 | Thomas H. Bayly | D | VA-07 | May 6, 1844 | 04th term |
| 24 | Isaac E. Morse | D | LA-04 | December 2, 1844 | 04th term | Left the House in 1851. |
| 25 | George Ashmun | W | MA-06 | March 4, 1845 | 03rd term | Left the House in 1851. |
| 26 | Meredith P. Gentry | W | TN-07 | March 4, 1845 Previous service, 1839–1843. | 05th term* |
| 27 | John H. Harmanson | D | LA-03 | March 4, 1845 | 03rd term | Died on October 24, 1850. |
| 28 | Henry W. Hilliard | W | AL-02 | March 4, 1845 | 03rd term | Left the House in 1851. |
| 29 | John W. Houston | W | DE | March 4, 1845 | 03rd term | Left the House in 1851. |
| 30 | Thomas B. King | W | GA-01 | March 4, 1845 Previous service, 1839–1843. | 05th term* | Resigned on March 3, 1850. |
| 31 | Lewis C. Levin | W | PA-01 | March 4, 1845 | 03rd term | Left the House in 1851. |
| 32 | John S. Phelps | D | MO-05 | March 4, 1845 | 03rd term |
| 33 | Joseph M. Root | W | OH-21 | March 4, 1845 | 03rd term | Left the House in 1851. |
| 34 | Frederick P. Stanton | D | TN-10 | March 4, 1845 | 03rd term |
| 35 | James Thompson | D | PA-23 | March 4, 1845 | 03rd term | Left the House in 1851. |
| 36 | Robert Toombs | W | GA-08 | March 4, 1845 | 03rd term |
| 37 | Hugh White | W | NY-16 | March 4, 1845 | 03rd term | Left the House in 1851. |
| 38 | David Wilmot | D | PA-12 | March 4, 1845 | 03rd term | Left the House in 1851. |
| 39 | Emile La Sére | D | LA-01 | January 29, 1846 | 03rd term | Left the House in 1851. |
| 40 | James McDowell | D | VA-11 | March 6, 1846 | 03rd term | Left the House in 1851. |
| 41 | David S. Kaufman | D | TX-01 | March 30, 1846 | 03rd term | Died on January 31, 1851. |
| 42 | Franklin Welsh Bowdon | D | AL-07 | December 7, 1846 | 03rd term | Left the House in 1851. |
| 43 | Shepherd Leffler | D | IA-02 | December 29, 1846 | 03rd term | Left the House in 1851. |
| 44 | Kinsley S. Bingham | D | MI-03 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 45 | Albert G. Brown | D | MS-04 | March 4, 1847 Previous service, 1839–1841. | 03rd term* |
| 46 | Thomas S. Bocock | D | VA-04 | March 4, 1847 | 02nd term |
| 47 | Chester Pierce Butler | W | PA-11 | March 4, 1847 | 02nd term | Died on October 5, 1850. |
| 48 | Edward C. Cabell | W | FL | March 4, 1847 Previous service, 1845–1846. | 03rd term* |
| 49 | Thomas L. Clingman | W | NC-01 | March 4, 1847 Previous service, 1843–1845. | 03rd term* |
| 50 | Williamson R. W. Cobb | D | AL-06 | March 4, 1847 | 02nd term |
| 51 | Harmon S. Conger | W | NY-25 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 52 | John Crowell | W | OH-19 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 53 | Rodolphus Dickinson | D | OH-06 | March 4, 1847 | 02nd term | Died on March 20, 1849. |
| 54 | William Duer | W | NY-23 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 55 | Alexander Evans | W | MD-05 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 56 | Nathan Evans | W | OH-14 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 57 | Winfield S. Featherston | D | MS-02 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 58 | John Freedley | W | PA-05 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 59 | James S. Green | D | MO-03 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 60 | Daniel Gott | W | NY-24 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 61 | Willard Preble Hall | D | MO-04 | March 4, 1847 | 02nd term |
| 62 | Moses Hampton | W | PA-21 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 63 | Sampson W. Harris | D | AL-03 | March 4, 1847 | 02nd term |
| 64 | William Henry | W | VT-01 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 65 | Samuel W. Inge | D | AL-04 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 66 | Robert W. Johnson | D | AR | March 4, 1847 | 02nd term |
| 67 | Job Mann | D | PA-19 | March 4, 1847 Previous service, 1835–1837. | 03rd term* | Left the House in 1851. |
| 68 | Robert M. McLane | D | MD-04 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 69 | John K. Miller | D | OH-11 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 70 | Charles S. Morehead | W | KY-08 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 71 | Jonathan D. Morris | D | OH-07 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 72 | William Nelson | W | NY-07 | March 4, 1847 | 02nd term |
| 73 | Henry Nes | W | PA-15 | March 4, 1847 Previous service, 1843–1845. | 03rd term* | Died on September 10, 1850. |
| 74 | William A. Newell | W | NJ-02 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 75 | David Outlaw | W | NC-09 | March 4, 1847 | 02nd term |
| 76 | Charles H. Peaslee | D | NH-02 | March 4, 1847 | 02nd term |
| 77 | Lucius B. Peck | D | VT-04 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 78 | Harvey Putnam | W | NY-33 | March 4, 1847 Previous service, 1838–1839. | 03rd term* | Left the House in 1851. |
| 79 | Gideon Reynolds | W | NY-12 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 80 | John L. Robinson | D | IN-03 | March 4, 1847 | 02nd term |
| 81 | Robert L. Rose | W | NY-29 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 82 | David Rumsey | W | NY-30 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 83 | Augustine Henry Shepperd | W | NC-04 | March 4, 1847 Previous service, 1827–1839 and 1841–1843. | 09th term** | Left the House in 1851. |
| 84 | Peter H. Silvester | W | NY-11 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 85 | William Strong | D | PA-09 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 86 | John L. Taylor | W | OH-08 | March 4, 1847 | 02nd term |
| 87 | James Houston Thomas | D | TN-06 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 88 | John B. Thompson | W | KY-05 | March 4, 1847 Previous service, 1840–1843. | 04th term* | Left the House in 1851. |
| 89 | William Thompson | D | IA-01 | March 4, 1847 | 02nd term | Resigned on June 29, 1850. |
| 90 | Amos Tuck | D | NH-01 | March 4, 1847 | 02nd term |
| 91 | Abraham W. Venable | D | NC-05 | March 4, 1847 | 02nd term |
| 92 | John Van Dyke | W | NJ-04 | March 4, 1847 | 02nd term | Left the House in 1851. |
| 93 | James Wilson II | W | NH-03 | March 4, 1847 | 02nd term | Resigned on September 9, 1850. |
| 94 | Richard K. Meade | D | VA-02 | August 5, 1847 | 02nd term |
| 95 | William A. Richardson | D | IL-05 | December 6, 1847 | 02nd term |
| 96 | Horace Mann | W | MA-08 | April 3, 1848 | 02nd term |
| 97 | Daniel Wallace | D | SC-01 | June 12, 1848 | 02nd term |
| 98 | John McQueen | D | SC-04 | February 12, 1849 | 02nd term |
| 99 | Nathaniel Albertson | D | IN-01 | March 4, 1849 | 01st term | Left the House in 1851. |
| 100 | Henry P. Alexander | W | NY-17 | March 4, 1849 | 01st term | Left the House in 1851. |
| 101 | Charles Allen | W | MA-05 | March 4, 1849 | 01st term |
| 102 | William J. Alston | W | AL-01 | March 4, 1849 | 01st term | Left the House in 1851. |
| 103 | Josiah M. Anderson | W | TN-03 | March 4, 1849 | 01st term | Left the House in 1851. |
| 104 | George R. Andrews | W | NY-14 | March 4, 1849 | 01st term | Left the House in 1851. |
| 105 | William S. Ashe | D | NC-07 | March 4, 1849 | 01st term |
| 106 | Thomas H. Averett | D | VA-03 | March 4, 1849 | 01st term |
| 107 | Edward D. Baker | W | IL-06 | March 4, 1849 Previous service, 1845–1847. | 02nd term* | Left the House in 1851. |
| 108 | William Van Ness Bay | D | MO-02 | March 4, 1849 | 01st term | Left the House in 1851. |
| 109 | James M. H. Beale | D | VA-14 | March 4, 1849 Previous service, 1833–1837. | 03rd term* |
| 110 | Henry Bennett | W | NY-22 | March 4, 1849 | 01st term |
| 111 | William H. Bissell | D | IL-01 | March 4, 1849 | 01st term |
| 112 | David A. Bokee | W | NY-02 | March 4, 1849 | 01st term | Left the House in 1851. |
| 113 | Walter Booth | D | CT-02 | March 4, 1849 | 01st term | Left the House in 1851. |
| 114 | Richard Bowie | W | MD-01 | March 4, 1849 | 01st term |
| 115 | Daniel Breck | W | KY-06 | March 4, 1849 | 01st term | Left the House in 1851. |
| 116 | George Briggs | W | NY-05 | March 4, 1849 | 01st term |
| 117 | James Brooks | W | NY-06 | March 4, 1849 | 01st term |
| 118 | Alexander W. Buel | D | MI-01 | March 4, 1849 | 01st term | Left the House in 1851. |
| 119 | Lorenzo Burrows | W | NY-34 | March 4, 1849 | 01st term |
| 120 | Thomas B. Butler | W | CT-04 | March 4, 1849 | 01st term | Left the House in 1851. |
| 121 | William J. Brown | D | IN-05 | March 4, 1849 Previous service, 1843–1845. | 02nd term* | Left the House in 1851. |
| 122 | Joseph Cable | D | OH-17 | March 4, 1849 | 01st term |
| 123 | George Caldwell | D | KY-04 | March 4, 1849 Previous service, 1843–1845. | 02nd term* | Left the House in 1851. |
| 124 | Joseph P. Caldwell | W | NC-02 | March 4, 1849 | 01st term |
| 125 | Samuel Calvin | W | PA-17 | March 4, 1849 | 01st term | Left the House in 1851. |
| 126 | Lewis D. Campbell | W | OH-02 | March 4, 1849 | 01st term |
| 127 | David K. Cartter | D | OH-18 | March 4, 1849 | 01st term |
| 128 | Joseph Casey | W | PA-13 | March 4, 1849 | 01st term | Left the House in 1851. |
| 129 | Joseph R. Chandler | W | PA-02 | March 4, 1849 | 01st term |
| 130 | Charles E. Clarke | W | NY-19 | March 4, 1849 | 01st term | Left the House in 1851. |
| 131 | Chauncey F. Cleveland | D | CT-03 | March 4, 1849 | 01st term |
| 132 | William F. Colcock | D | SC-07 | March 4, 1849 | 01st term |
| 133 | Orasmus Cole | W | WI-02 | March 4, 1849 | 01st term | Left the House in 1851. |
| 134 | Charles M. Conrad | W | LA-02 | March 4, 1849 | 01st term | Resigned on August 17, 1850. |
| 135 | Moses Bledso Corwin | W | OH-04 | March 4, 1849 | 01st term | Left the House in 1851. |
| 136 | Edmund Deberry | W | NC-03 | March 4, 1849 Previous service, 1829–1831 and 1833–1845. | 08th term** | Left the House in 1851. |
| 137 | Jesse C. Dickey | W | PA-07 | March 4, 1849 | 01st term | Left the House in 1851. |
| 138 | Milo M. Dimmick | W | PA-10 | March 4, 1849 | 01st term |
| 139 | David T. Disney | D | OH-01 | March 4, 1849 | 01st term |
| 140 | Nathan F. Dixon II | W | RI-02 | March 4, 1849 | 01st term | Left the House in 1851. |
| 141 | James D. Doty | D | WI-03 | March 4, 1849 Previous service, 1839–1841. | 03rd term* |
| 142 | James H. Duncan | W | MA-03 | March 4, 1849 | 01st term |
| 143 | Cyrus L. Dunham | D | IN-02 | March 4, 1849 | 01st term |
| 144 | Charles Durkee | D | WI-01 | March 4, 1849 | 01st term |
| 145 | Henry A. Edmundson | D | VA-12 | March 4, 1849 | 01st term | Left the House in 1851. |
| 146 | Andrew Ewing | D | TN-08 | March 4, 1849 | 01st term | Left the House in 1851. |
| 147 | Graham N. Fitch | D | IN-09 | March 4, 1849 | 01st term |
| 148 | Orin Fowler | W | MA-09 | March 4, 1849 | 01st term |
| 149 | Thomas J. D. Fuller | D | ME-07 | March 4, 1849 | 01st term |
| 150 | Elbridge Gerry | D | ME-01 | March 4, 1849 | 01st term | Left the House in 1851. |
| 151 | Alfred Gilmore | D | PA-24 | March 4, 1849 | 01st term |
| 152 | Rufus K. Goodenow | W | ME-04 | March 4, 1849 | 01st term | Left the House in 1851. |
| 153 | Herman D. Gould | W | NY-10 | March 4, 1849 | 01st term | Left the House in 1851. |
| 154 | Willis A. Gorman | D | IN-06 | March 4, 1849 | 01st term |
| 155 | Thomas C. Hackett | D | GA-05 | March 4, 1849 | 01st term | Left the House in 1851. |
| 156 | Ransom Halloway | W | NY-08 | March 4, 1849 | 01st term | Left the House in 1851. |
| 157 | William T. Hamilton | D | MD-02 | March 4, 1849 | 01st term |
| 158 | Edward Hammond | D | MD-03 | March 4, 1849 | 01st term |
| 159 | Andrew J. Harlan | D | IN-10 | March 4, 1849 | 01st term | Left the House in 1851. |
| 160 | Isham G. Harris | D | TN-09 | March 4, 1849 | 01st term |
| 161 | Thomas L. Harris | D | IL-07 | March 4, 1849 | 01st term | Left the House in 1851. |
| 162 | Andrew K. Hay | W | NJ-01 | March 4, 1849 | 01st term | Left the House in 1851. |
| 163 | William Hebard | W | VT-02 | March 4, 1849 | 01st term |
| 164 | David Hubbard | D | AL-05 | March 4, 1849 Previous service, 1839–1841. | 02nd term* | Left the House in 1851. |
| 165 | Harry Hibbard | D | NH-04 | March 4, 1849 | 01st term |
| 166 | Moses Hoagland | D | OH-16 | March 4, 1849 | 01st term | Left the House in 1851. |
| 167 | Alexander Holladay | D | VA-08 | March 4, 1849 | 01st term |
| 168 | Volney Howard | D | TX-02 | March 4, 1849 | 01st term |
| 169 | John W. Howe | W | PA-22 | March 4, 1849 | 01st term |
| 170 | William F. Hunter | W | OH-15 | March 4, 1849 | 01st term |
| 171 | William T. Jackson | W | NY-26 | March 4, 1849 | 01st term | Left the House in 1851. |
| 172 | James L. Johnson | W | KY-02 | March 4, 1849 | 01st term | Left the House in 1851. |
| 173 | George W. Julian | D | IN-04 | March 4, 1849 | 01st term | Left the House in 1851. |
| 174 | John B. Kerr | W | MD-06 | March 4, 1849 | 01st term | Left the House in 1851. |
| 175 | George G. King | W | RI-01 | March 4, 1849 | 01st term |
| 176 | James G. King | W | NJ-05 | March 4, 1849 | 01st term | Left the House in 1851. |
| 177 | John A. King | W | NY-01 | March 4, 1849 | 01st term | Left the House in 1851. |
| 178 | Preston King | W | NY-18 | March 4, 1849 Previous service, 1843–1847. | 03rd term* |
| 179 | Nathaniel Littlefield | D | ME-02 | March 4, 1849 Previous service, 1841–1843. | 02nd term* | Left the House in 1851. |
| 180 | Humphrey Marshall | W | KY-07 | March 4, 1849 | 01st term |
| 181 | John C. Mason | D | KY-09 | March 4, 1849 | 01st term |
| 182 | Orsamus B. Matteson | W | NY-20 | March 4, 1849 | 01st term | Left the House in 1851. |
| 183 | Joseph E. McDonald | D | IN-08 | March 4, 1849 | 01st term | Left the House in 1851. |
| 184 | Edward W. McGaughey | W | IN-07 | March 4, 1849 Previous service, 1845–1847. | 02nd term* | Left the House in 1851. |
| 185 | Thomas McKissock | W | NY-09 | March 4, 1849 | 01st term | Left the House in 1851. |
| 186 | James Xavier McLanahan | D | PA-16 | March 4, 1849 | 01st term |
| 187 | Finis McLean | W | KY-03 | March 4, 1849 | 01st term | Left the House in 1851. |
| 188 | Fayette McMullen | D | VA-13 | March 4, 1849 | 01st term |
| 189 | John Millson | D | VA-01 | March 4, 1849 | 01st term |
| 190 | Henry D. Moore | W | PA-03 | March 4, 1849 | 01st term |
| 191 | Jeremiah Morton | W | VA-09 | March 4, 1849 | 01st term | Left the House in 1851. |
| 192 | Alexander Newman | D | VA-15 | March 4, 1849 | 01st term | Died on September 8, 1849. |
| 193 | Andrew J. Ogle | W | PA-18 | March 4, 1849 | 01st term | Left the House in 1851. |
| 194 | Edson B. Olds | D | OH-09 | March 4, 1849 | 01st term |
| 195 | James L. Orr | D | SC-02 | March 4, 1849 | 01st term |
| 196 | John Otis | W | ME-03 | March 4, 1849 | 01st term | Left the House in 1851. |
| 197 | Allen F. Owen | W | GA-03 | March 4, 1849 | 01st term | Left the House in 1851. |
| 198 | Richard Parker | D | VA-10 | March 4, 1849 | 01st term | Left the House in 1851. |
| 199 | Jonas P. Phoenix | W | NY-03 | March 4, 1849 Previous service, 1843–1845. | 02nd term* | Left the House in 1851. |
| 200 | Charles W. Pitman | W | PA-14 | March 4, 1849 | 01st term | Left the House in 1851. |
| 201 | Emery D. Potter | D | OH-05 | March 4, 1849 Previous service, 1843–1845. | 02nd term* | Left the House in 1851. |
| 202 | Paulus Powell | D | VA-05 | March 4, 1849 | 01st term |
| 203 | Robert R. Reed | W | PA-20 | March 4, 1849 | 01st term | Left the House in 1851. |
| 204 | Elijah Risley | W | NY-31 | March 4, 1849 | 01st term | Left the House in 1851. |
| 205 | John Robbins | D | PA-04 | March 4, 1849 | 01st term |
| 206 | Thomas Ross | D | PA-06 | March 4, 1849 | 01st term |
| 207 | William A. Sackett | W | NY-27 | March 4, 1849 | 01st term |
| 208 | John H. Savage | D | TN-04 | March 4, 1849 | 01st term |
| 209 | Cullen Sawtelle | D | ME-05 | March 4, 1849 Previous service, 1845–1847. | 02nd term* | Left the House in 1851. |
| 210 | Abraham M. Schermerhorn | W | NY-28 | March 4, 1849 | 01st term |
| 211 | John L. Schoolcraft | W | NY-13 | March 4, 1849 | 01st term |
| 212 | James Seddon | D | VA-06 | March 4, 1849 Previous service, 1845–1847. | 02nd term* | Left the House in 1851. |
| 213 | Elbridge G. Spaulding | W | NY-32 | March 4, 1849 | 01st term | Left the House in 1851. |
| 214 | William Sprague | W | MI-02 | March 4, 1849 | 01st term | Left the House in 1851. |
| 215 | Richard H. Stanton | D | KY-10 | March 4, 1849 | 01st term |
| 216 | Edward Stanly | W | NC-08 | March 4, 1849 Previous service, 1837–1843. | 04th term* |
| 217 | Charles Stetson | D | ME-06 | March 4, 1849 | 01st term | Left the House in 1851. |
| 218 | Thaddeus Stevens | W | PA-08 | March 4, 1849 | 01st term |
| 219 | Charles Sweetser | D | OH-10 | March 4, 1849 | 01st term |
| 220 | John R. Thurman | W | NY-15 | March 4, 1849 | 01st term | Left the House in 1851. |
| 221 | Walter Underhill | W | NY-04 | March 4, 1849 | 01st term | Left the House in 1851. |
| 222 | Hiram Walden | D | NY-21 | March 4, 1849 | 01st term | Left the House in 1851. |
| 223 | Loren P. Waldo | D | CT-01 | March 4, 1849 | 01st term | Left the House in 1851. |
| 224 | Albert G. Watkins | W | TN-02 | March 4, 1849 | 01st term |
| 225 | Marshall J. Wellborn | D | GA-02 | March 4, 1849 | 01st term | Left the House in 1851. |
| 226 | William A. Whittlesey | D | OH-13 | March 4, 1849 | 01st term | Left the House in 1851. |
| 227 | Isaac Wildrick | D | NJ-03 | March 4, 1849 | 01st term |
| 228 | Christopher H. Williams | W | TN-11 | March 4, 1849 Previous service, 1837–1843. | 04th term* |
| 229 | Timothy R. Young | D | IL-03 | March 4, 1849 | 01st term | Left the House in 1851. |
| | Thomas Haymond | W | VA-15 | November 8, 1849 | 01st term | Left the House in 1851. |
| | James Meacham | W | VT-03 | December 3, 1849 | 01st term |
| | William McWillie | D | MS-03 | December 3, 1849 | 01st term | Left the House in 1851. |
| | Amos E. Wood | D | OH-06 | December 3, 1849 | 01st term | Died on November 19, 1850. |
| | Joseph W. Jackson | D | GA-01 | March 4, 1850 | 01st term |
| | Samuel A. Eliot | W | MA-01 | August 22, 1850 | 01st term | Left the House in 1851. |
| | Edward Gilbert | D | CA | September 11, 1850 | 01st term | Left the House in 1851. |
| | George W. Wright | D | CA | September 11, 1850 | 01st term | Left the House in 1851. |
| | George W. Morrison | D | NH-03 | October 8, 1850 | 01st term | Left the House in 1851. |
| | Joel B. Danner | D | PA-15 | December 2, 1850 | 01st term | Left the House in 1851. |
| | Henry A. Bullard | W | LA-02 | December 5, 1850 Previous service, 1831–1834. | 03rd term* | Left the House in 1851. |
| | Daniel F. Miller | W | IA-01 | December 20, 1850 | 01st term | Left the House in 1851. |
| | Alexander G. Penn | D | LA-03 | December 30, 1850 | 01st term |
| | John Bell | W | OH-06 | January 7, 1851 | 01st term | Left the House in 1851. |
| | John Brisbin | D | PA-11 | January 15, 1851 | 01st term | Left the House in 1851. |

## Delegates

| Rank | Delegate | Party | District | Seniority date (Previous service, if any) | No.# of term(s) | Notes |
| 1 | Henry Hastings Sibley | D | MN | July 7, 1849 Previous service, 1848–1849. | 02nd term* | |
| 2 | Samuel Thurston | D | OR | December 3, 1849 | 01st term | |