List of United States senators in the 36th Congress

This is a complete list of members of the United States Senate during the 36th United States Congress listed by seniority, from March 4, 1859, to March 3, 1861.

Order of service is based on the commencement of the senator's first term. Behind this is former service as a senator (only giving the senator seniority within his or her new incoming class), service as vice president, a House member, a cabinet secretary, or a governor of a state. The final factor is the population of the senator's state.

Senators who were sworn in during the middle of the Congress (up until the last senator who was not sworn in early after winning the November 1860 election) are listed at the end of the list with no number.

Terms of service

This article is about the terms of service of senators that expired in years. For a list of special elections to the United States Senate, see List of special elections to the United States Senate.

Class	Terms of service of senators that expired in years
Class 3	Terms of service of senators that expired in 1861 (AL, AR, CA, CT, FL, GA, IA, IL, IN, KS, KY, LA, MD, MO, NC, NH, NY, OH, OR, PA, SC, VT, and WI.)
Class 1	Terms of service of senators that expired in 1863 (CA, CT, DE, FL, IN, MA, MD, ME, MI, MN, MO, MS, NJ, NY, OH, PA, RI, TN, TX, VA, VT, and WI.)
Class 2	Terms of service of senators that expired in 1865 (AL, AR, DE, GA, IA, IL, KS, KY, LA, MA, ME, MI, MN, MS, NC, NH, NJ, OR, RI, SC, TN, TX, and VA.)

U.S. Senate seniority list

U.S. Senate seniority
Rank	Senator (party-state)	Seniority date	Other factors
1	James Alfred Pearce (D-MD)	March 4, 1843
2	Jesse D. Bright (D-IN)	March 4, 1845
3	James M. Mason (D-VA)	January 21, 1847
4	Stephen A. Douglas (D-IL)	March 4, 1847
5	Robert M. T. Hunter (D-VA)	March 4, 1847
6	William K. Sebastian (D-AR)	May 12, 1848
7	William H. Seward (R-NY)	March 4, 1849
8	Solomon Foot (R-VT)	March 4, 1851
9	James A. Bayard Jr. (D-DE)
10	Stephen Mallory (D-FL)
11	Benjamin Wade (R-OH)	March 15, 1851
12	Charles Sumner (LR-MA)	April 11, 1851
13	John R. Thomson (D-NJ)	March 4, 1853
14	Robert Toombs (D-GA)
15	Judah P. Benjamin (D-LA)
16	Robert Ward Johnson (D-AR)	July 6, 1853
17	Clement Claiborne Clay (D-AL)	November 29, 1853
18	John Slidell (D-LA)	December 5, 1853
19	Albert G. Brown (D-MS)	January 7, 1854
20	William P. Fessenden (R-ME)	February 10, 1854
21	Henry Wilson (R-MA)	January 31, 1855
22	Lyman Trumbull (R-IL)	March 4, 1855
23	Jacob Collamer (R-VT)
24	Lafayette S. Foster (R-CT)
25	David Levy Yulee (D-FL)
26	Alfred Iverson, Sr. (D-GA)
27	John Jordan Crittenden (KN-KY)
28	George E. Pugh (D-OH)
29	Charles Durkee (R-WI)
30	John P. Hale (R-NH)	July 30, 1855
31	Benjamin Fitzpatrick (D-AL)	November 26, 1855
32	William Bigler (D-PA)	January 14, 1856
33	James S. Green (D-MO)	January 12, 1857
34	William M. Gwin (D-CA)	January 13, 1857
35	James Harlan (R-IA)	January 29, 1857
36	Graham N. Fitch (D-IN)	February 4, 1857
37	Zachariah Chandler (R-MI)	March 4, 1857
38	James Dixon (R-CT)
39	James R. Doolittle (R-WI)
40	Anthony Kennedy (KN-MD)
41	Trusten Polk (D-MO)
42	Preston King (D-NY)
43	James F. Simmons (R-RI)
44	Hannibal Hamlin (R-ME)
45	David C. Broderick (D-CA)
46	Jefferson Davis (D-MS)
47	Simon Cameron (R-PA)
48	Daniel Clark (R-NH)	June 27, 1857
49	Andrew Johnson (D-TN)	October 8, 1857
50	James H. Hammond (D-SC)	December 7, 1857
51	Thomas Lanier Clingman (D-NC)	May 7, 1858
52	Henry Mower Rice (D-MN)	May 11, 1858
53	Matthias Ward (D-TX)	September 27, 1858
54	James Chesnut, Jr. (D-SC)	December 3, 1858
55	Joseph Lane (D-OR)	February 14, 1859
56	Henry B. Anthony (R-RI)	March 4, 1859	Former governor
57	Willard Saulsbury, Sr. (D-DE)
58	James W. Grimes (R-IA)
59	Lazarus W. Powell (D-KY)
60	Morton S. Wilkinson (R-MN)
61	John C. Ten Eyck (R-NJ)
62	Kinsley S. Bingham (D-MI)
63	Thomas Bragg (D-NC)
64	John Hemphill (D-TX)
65	Alfred Osborn Pope Nicholson (D-TN)
	Henry P. Haun (D-CA)	November 3, 1859
	Louis Wigfall (D-TX)	December 5, 1859
	Milton Latham (LD-CA)	March 5, 1860
	Edward D. Baker (R-OR)	October 2, 1860