Rank | Representative | Party | District | Seniority date | No.# of term(s) | Notes |
1 | John S. Phelps | D | MO-06 | March 4, 1845 | 09th term | Dean of the House Left the House in 1863 while still serving in the House as a U.S. Congress member. |
2 | Galusha A. Grow | D | PA-14 | March 4, 1851 | 06th term | Speaker of the House Left the House in 1863 while still serving in the House as a U.S. Congress member. |
3 | Elihu B. Washburne | R | IL-01 | March 4, 1853 | 05th term |
4 | John Bingham | R | OH-21 | March 4, 1855 | 04th term |
5 | James Buffington | R | MA-02 | March 4, 1855 | 04th term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
6 | Henry C. Burnett | D | KY-01 | March 4, 1855 | 04th term | Resigned on December 3, 1861 while still serving in the House as a U.S. Congress member. |
7 | Schuyler Colfax | R | IN-09 | March 4, 1855 | 04th term |
8 | John Covode | W | PA-19 | March 4, 1855 | 04th term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
9 | John Hickman | D | PA-06 | March 4, 1855 | 04th term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
10 | Justin S. Morrill | R | VT-02 | March 4, 1855 | 04th term |
11 | John Sherman | R | OH-13 | March 4, 1855 | 04th term | Resigned on March 12, 1861 while still serving in the House as a U.S. Congress member. |
12 | Samuel S. Cox | D | OH-12 | March 4, 1857 | 03rd term |
13 | Samuel R. Curtis | R | IA-01 | March 4, 1857 | 03rd term | Resigned on August 4, 1861 while still serving in the House as a U.S. Congress member. |
14 | Henry L. Dawes | R | MA-11 | March 4, 1857 | 03rd term |
15 | Reuben Fenton | R | NY-33 | March 4, 1857 Previous service, 1853–1855. | 04th term* |
16 | William Kellogg | R | IL-04 | March 4, 1857 | 03rd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
17 | Owen Lovejoy | R | IL-03 | March 4, 1857 | 03rd term |
18 | Horace Maynard | D | TN-02 | March 4, 1857 | 03rd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
19 | Edward J. Morris | R | PA-02 | March 4, 1857 | 03rd term | Resigned on June 8, 1861 while still serving in the House as a U.S. Congress member. |
20 | Abram B. Olin | R | NY-13 | March 4, 1857 | 03rd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
21 | George H. Pendleton | D | OH-01 | March 4, 1857 | 03rd term |
22 | John F. Potter | R | WI-01 | March 4, 1857 | 03rd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
23 | Eliakim P. Walton | R | VT-01 | March 4, 1857 | 03rd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
24 | John B. Clark | D | MO-03 | December 7, 1857 | 03rd term | Resigned on July 13, 1861 while still serving in the House as a U.S. Congress member. |
25 | Daniel W. Gooch | R | MA-07 | January 31, 1858 | 03rd term |
26 | Clement Vallandigham | D | OH-03 | May 25, 1858 | 03rd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
27 | Charles Francis Adams, Sr. | R | MA-03 | March 4, 1859 | 02nd term | Resigned on May 1, 1861 while still serving in the House as a U.S. Congress member. |
28 | Cyrus Aldrich | R | MN | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
29 | William Allen | D | OH-04 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
30 | John B. Alley | R | MA-06 | March 4, 1859 | 02nd term |
31 | James M. Ashley | R | OH-05 | March 4, 1859 | 02nd term |
32 | Elijah Babbitt | R | PA-25 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
33 | Samuel S. Blair | R | PA-18 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
34 | Alfred A. Burnham | R | CT-03 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
35 | James H. Campbell | R | PA-11 | March 4, 1859 Previous service, 1855–1857. | 03rd term* | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
36 | Roscoe Conkling | R | NY-20 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
37 | Thomas Corwin | D | OH-07 | March 4, 1859 Previous service, 1831–1840. | 07th term* | Resigned on March 12, 1861 while still serving in the House as a U.S. Congress member. |
38 | Charles Delano | R | MA-10 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
39 | R. Holland Duell | R | NY-21 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
40 | William M. Dunn | R | IN-03 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
41 | Sidney Edgerton | R | OH-18 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
42 | Thomas M. Edwards | R | NH-03 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
43 | Thomas D. Eliot | R | MA-01 | March 4, 1859 Previous service, 1854–1855. | 03rd term* |
44 | Alfred Ely | R | NY-29 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
45 | Philip B. Fouke | D | IL-08 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
46 | Augustus Frank | R | NY-30 | March 4, 1859 | 02nd term |
47 | John A. Gurley | R | OH-02 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
48 | James T. Hale | R | PA-15 | March 4, 1859 | 02nd term |
49 | William S. Holman | D | IN-04 | March 4, 1859 | 02nd term |
50 | John Hutchins | R | OH-20 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
51 | Francis William Kellogg | R | MI-03 | March 4, 1859 | 02nd term |
52 | John W. Killinger | R | PA-10 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
53 | John A. Logan | D | IL-09 | March 4, 1859 | 02nd term | Resigned on April 2, 1862 while still serving in the House as a U.S. Congress member. |
54 | Dwight Loomis | R | CT-01 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
55 | Robert Mallory | D | KY-07 | March 4, 1859 | 02nd term |
56 | Gilman Marston | R | NH-01 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
57 | James B. McKean | R | NY-15 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
58 | Robert McKnight | R | PA-22 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
59 | Edward McPherson | R | PA-17 | March 4, 1859 | 02nd term |
60 | James K. Moorhead | R | PA-21 | March 4, 1859 | 02nd term |
61 | John T. Nixon | R | NJ-01 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
62 | Warren P. Noble | D | OH-01 | March 4, 1859 | 02nd term |
63 | John W. Noell | D | MO-07 | March 4, 1859 | 02nd term |
64 | Albert G. Porter | R | IN-06 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
65 | Alexander H. Rice | R | MA-04 | March 4, 1859 | 02nd term |
66 | James C. Robinson | D | IL-07 | March 4, 1859 | 02nd term |
67 | George W. Scranton | R | PA-12 | March 4, 1859 | 02nd term | Died on March 24, 1861 while still serving in the House as a U.S. Congress member. |
68 | Charles B. Sedgwick | R | NY-24 | March 4, 1859 | 02nd term |
69 | Elbridge G. Spaulding | R | NY-32 | March 4, 1859 Previous service, 1849–1851. | 02nd term* | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
70 | Thaddeus Stevens | R | PA-09 | March 4, 1859 Previous service, 1849–1853. | 04th term* |
71 | John L. N. Stratton | R | NJ-02 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
72 | Charles R. Train | D | MA-08 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
73 | Carey A. Trimble | R | OH-10 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
74 | William Vandever | R | IA-02 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
75 | Charles Van Wyck | R | NY-10 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
76 | John P. Verree | R | PA-03 | March 4, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
77 | Edwin H. Webster | D | MD-02 | March 4, 1859 | 02nd term |
78 | William Windom | R | MN | March 4, 1859 | 02nd term |
79 | Harrison G. O. Blake | R | OH-14 | October 11, 1859 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
80 | John A. McClernand | D | IL-05 | November 8, 1859 Previous service, 1843–1851. | 06th term* | Resigned on October 28, 1861 while still serving in the House as a U.S. Congress member. |
81 | Martin F. Conway | R | KS | January 29, 1861 | 02nd term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
82 | Sydenham E. Ancona | D | PA-08 | March 4, 1861 | 01st term |
83 | William Appleton | R | MA-05 | March 4, 1861 Previous service, 1851–1855. | 03rd term* | Resigned on September 27, 1861 while still serving in the House as a U.S. Congress member. |
84 | Isaac N. Arnold | R | IL-02 | March 4, 1861 | 01st term |
85 | Goldsmith Bailey | D | MA-09 | March 4, 1861 | 01st term | Died on May 8, 1862 while still serving in the House as a U.S. Congress member. |
86 | Joseph Bailey | D | PA-16 | March 4, 1861 | 01st term |
87 | Stephen Baker | R | NY-12 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
88 | Portus Baxter | R | VT-03 | March 4, 1861 | 01st term |
89 | Fernando C. Beaman | R | MI-02 | March 4, 1861 | 01st term |
90 | Francis Preston Blair, Jr. | R | MO-01 | March 4, 1861 Previous service, 1857–1859 and 1860. | 03rd term* |
91 | George W. Bridges | D | TN-03 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
92 | William G. Brown, Sr. | D | VA-10 | March 4, 1861 Previous service, 1845–1849. | 03rd term* |
93 | George H. Browne | D | RI-02 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
94 | Charles B. Calvert | D | MD-06 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
95 | John S. Carlile | D | VA-11 | March 4, 1861 Previous service, 1855–1857. | 02nd term* | Resigned on July 9, 1861 while still serving in the House as a U.S. Congress member. |
96 | Jacob P. Chamberlain | R | NY-26 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
97 | Ambrose W. Clark | R | NY-23 | March 4, 1861 | 01st term |
98 | Andrew J. Clements | D | TN-04 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
99 | George T. Cobb | D | NJ-04 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
100 | Frederick A. Conkling | R | NY-06 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
101 | Erastus Corning | D | NY-14 | March 4, 1861 Previous service, 1857–1859. | 02nd term* |
102 | Thomas B. Cooper | D | PA-07 | March 4, 1861 | 01st term | Died on April 4, 1862 while still serving in the House as a U.S. Congress member. |
103 | James A. Cravens | D | IN-02 | March 4, 1861 | 01st term |
104 | John W. Crisfield | R | MD-01 | March 4, 1861 Previous service, 1847–1849. | 02nd term* | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
105 | John J. Crittenden | D | KY-08 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
106 | William P. Cutler | R | OH-16 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
107 | William M. Davis | R | PA-05 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
108 | Isaac C. Delaplaine | D | NY-08 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
109 | Alexander S. Diven | R | NY-27 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
110 | George W. Dunlap | D | KY-06 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
111 | James E. English | D | CT-02 | March 4, 1861 | 01st term |
112 | Samuel C. Fessenden | R | ME-03 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
113 | George P. Fisher | R | DE | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
114 | Richard Franchot | R | NY-19 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
115 | John N. Goodwin | R | ME-01 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
116 | Bradley F. Granger | R | MI-01 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
117 | Henry Grider | D | KY-03 | March 4, 1861 Previous service, 1843–1847. | 03rd term* |
118 | Edward Haight | D | NY-09 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
119 | Luther Hanchett | R | WI-02 | March 4, 1861 | 01st term | Died on November 24, 1862 while still serving in the House as a U.S. Congress member. |
120 | Aaron Harding | R | KY-04 | March 4, 1861 | 01st term |
121 | Valentine B. Horton | D | OH-11 | March 4, 1861 Previous service, 1855–1859. | 03rd term* | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
122 | James S. Jackson | R | KY-02 | March 4, 1861 | 01st term | Resigned on December 13, 1861 while still serving in the House as a U.S. Congress member. |
123 | Philip Johnson | D | PA-13 | March 4, 1861 | 01st term |
124 | George W. Julian | D | IN-05 | March 4, 1861 Previous service, 1849–1851. | 02nd term* |
125 | William D. Kelley | R | PA-04 | March 4, 1861 | 01st term |
126 | James Kerrigan | D | NY-04 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
127 | William E. Lansing | R | NY-22 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
128 | John Law | D | IN-01 | March 4, 1861 | 01st term |
129 | Jesse Lazear | D | PA-20 | March 4, 1861 | 01st term |
130 | Cornelius Leary | D | MD-03 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
131 | William E. Lehman | D | PA-01 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
132 | Henry May | D | MD-04 | March 4, 1861 Previous service, 1853–1855. | 02nd term* | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
133 | John W. Menzies | D | KY-10 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
134 | William Mitchell | R | IN-10 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
135 | Anson Morrill | R | ME-04 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
136 | James R. Morris | D | OH-17 | March 4, 1861 | 01st term |
137 | Warren P. Noble | D | OH-09 | March 4, 1861 | 01st term |
138 | Elijah H. Norton | D | MO-04 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
139 | Robert H. Nugen | D | OH-15 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
140 | Moses F. Odell | D | NY-02 | March 4, 1861 | 01st term |
141 | John Patton | R | PA-24 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
142 | Nehemiah Perry | D | NJ-05 | March 4, 1861 | 01st term |
143 | Timothy Guy Phelps | R | CA | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
144 | Frederick A. Pike | R | ME-06 | March 4, 1861 | 01st term |
145 | Theodore M. Pomeroy | R | NY-25 | March 4, 1861 | 01st term |
146 | John W. Reid | D | MO-05 | March 4, 1861 | 01st term | Resigned on August 3, 1861 while still serving in the House as a U.S. Congress member. |
147 | John H. Rice | R | ME-05 | March 4, 1861 | 01st term |
148 | William A. Richardson | D | IL-05 | March 4, 1861 Previous service, 1847–1856. | 06th term* | Resigned on January 29, 1863 while still serving in the House as a U.S. Congress member. |
149 | Albert G. Riddle | R | OH-19 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
150 | Edward H. Rollins | R | NH-02 | March 4, 1861 | 01st term |
151 | James S. Rollins | R | MO-02 | March 4, 1861 | 01st term |
152 | Aaron A. Sargent | R | CA | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
153 | John P. C. Shanks | R | IN-11 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
154 | William P. Sheffield | R | RI-01 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
155 | Samuel Shellabarger | R | OH-08 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
156 | Socrates N. Sherman | R | NY-17 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
157 | A. Scott Sloan | R | WI-03 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
158 | Edward H. Smith | D | NY-01 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
159 | John B. Steele | D | NY-11 | March 4, 1861 | 01st term |
160 | William G. Steele | D | NJ-03 | March 4, 1861 | 01st term |
161 | Andrew J. Thayer | D | OR | March 4, 1861 | 01st term | Resigned on July 30, 1861 while still serving in the House as a U.S. Congress member. |
162 | Francis Thomas | D | MD-05 | March 4, 1861 Previous service, 1831–1841. | 06th term* |
163 | Rowland E. Trowbridge | R | MI-04 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
164 | Burt Van Horn | R | NY-31 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
165 | Robert B. Van Valkenburgh | R | NY-28 | March 4, 1861 | 01st term |
166 | Chauncey Vibbard | R | NY-18 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
167 | Daniel W. Voorhees | D | IN-07 | March 4, 1861 | 01st term |
168 | William H. Wadsworth | D | KY-09 | March 4, 1861 | 01st term |
169 | John W. Wallace | R | PA-23 | March 4, 1861 | 01st term |
170 | William Wall | D | NY-05 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
171 | Charles W. Walton | R | ME-02 | March 4, 1861 | 01st term | Resigned on May 26, 1862 while still serving in the House as a U.S. Congress member. |
172 | Elijah Ward | D | NY-07 | March 4, 1861 Previous service, 1857–1859. | 02nd term* |
173 | Kellian Whaley | D | VA-12 | March 4, 1861 | 01st term |
174 | William A. Wheeler | R | NY-16 | March 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
175 | Albert S. White | R | IN-08 | March 4, 1861 Previous service, 1837–1839. | 02nd term* | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
176 | Chilton A. White | D | OH-06 | March 4, 1861 | 01st term |
177 | Charles A. Wickliffe | D | KY-05 | March 4, 1861 Previous service, 1823–1833. | 06th term* | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
178 | Benjamin Wood | D | NY-03 | March 4, 1861 | 01st term |
179 | George C. Woodruff | D | CT-04 | March 4, 1861 | 01st term |
181 | Charles H. Upton | D | VA-07 | May 23, 1861 | 01st term | Resigned on February 27, 1862 while still serving in the House as a U.S. Congress member. |
| Benjamin Thomas | R | MA-03 | June 11, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
| Charles J. Biddle | D | PA-02 | July 2, 1861 | 01st term |
| Richard A. Harrison | D | OH-07 | July 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
| Samuel T. Worcester | R | OH-13 | July 4, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
| Hendrick B. Wright | R | PA-12 | July 4, 1861 Previous service, 1853–1855. | 02nd term* | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
| George K. Shiel | D | OR | July 30, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
| James F. Wilson | R | IA-01 | October 8, 1861 | 01st term |
| Jacob B. Blair | D | VA-11 | December 2, 1861 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
| Samuel Hooper | R | MA-05 | December 2, 1861 | 01st term |
| Anthony L. Knapp | D | IL-06 | December 12, 1861 | 01st term |
| William A. Hall | R | MO-03 | January 20, 1862 | 01st term |
| Thomas L. Price | D | MO-05 | January 21, 1862 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
| Samuel L. Casey | D | KY-01 | March 10, 1862 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
| Joseph Segar | R | VA-01 | March 16, 1862 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
| William J. Allen | D | IL-09 | June 2, 1862 | 01st term |
| Frederick Low | R | CA | June 3, 1862 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
| John D. Stiles | D | PA-07 | June 3, 1862 | 01st term |
| T. A. D. Fessenden | R | ME-02 | December 1, 1862 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
| Amasa Walker | D | MA-09 | December 1, 1862 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
| George H. Yeaman | D | KY-02 | December 1, 1862 | 01st term |
| Michael Hahn | R | LA-02 | December 3, 1862 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
| Benjamin Flanders | R | LA-01 | December 3, 1862 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |
| Walter D. McIndoe | R | WI-02 | January 26, 1863 | 01st term |
| Lewis McKenzie | D | VA-07 | February 16, 1863 | 01st term | Left the House in 1863 while still serving in the House as a U.S. Congress member. |