List of United States senators in the 45th Congress

This is a complete list of members of the United States Senate during the 45th United States Congress listed by seniority, from March 4, 1877, to March 3, 1879.

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.^[1]^[2]^[3]^[4]

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 1878 election) are listed at the end of the list with no number.

Terms of service

Class	Terms of service of senators that expired in years
Class 3	Terms of service of senators that expired in 1879 (AL, AR, CA, CO, CT, FL, GA, IA, IL, IN, KS, KY, LA, MD, MO, NC, NH, NV, NY, OH, OR, PA, SC, SD, VT, and WI.)^[5]
Class 1	Terms of service of senators that expired in 1881 (CA, CT, DE, FL, IN, MA, MD, ME, MI, MN, MO, MS, NE, NJ, NV, NY, OH, PA, RI, TN, TX, VA, VT, WI, and WV)^[6]
Class 2	Terms of service of senators that expired in 1883 (AL, AR, CO, DE, GA, IA, IL, KS, KY, LA, MA, ME, MI, MN, MS, NC, NE, NH, NJ, OR, RI, SC, TN, TX, VA, and WV.)^[7]

U.S. Senate seniority list

U.S. Senate seniority
Rank	Senator (party-state)	Seniority date	Other factors
1	Henry B. Anthony (R-RI)	March 4, 1859	Former governor
2	Timothy O. Howe (R-WI)	March 4, 1861
3	John Sherman (R-OH)	March 21, 1861
4	George F. Edmunds (R-VT)	April 3, 1866
5	Roscoe Conkling (R-NY)	March 4, 1867
6	Justin Smith Morrill (R-VT)
7	Oliver P. Morton (R-IN)
8	Simon Cameron (R-PA)
9	George E. Spencer (R-AL)	July 13, 1868
10	Thomas F. Bayard (D-DE)	March 4, 1869
11	Hannibal Hamlin (R-ME)
12	Allen G. Thurman (D-OH)
13	Eli Saulsbury (D-DE)	March 4, 1871
14	Thomas W. Ferry (R-MI)
15	William Windom (R-MN)		Former representative
16	Henry G. Davis (D-WV)
17	John W. Johnston (D-VA)	March 15, 1871
18	Matt W. Ransom (D-NC)	January 30, 1872
19	William B. Allison (R-IA)	March 4, 1873	Former representative
20	John P. Jones (R-NV)
21	John Brown Gordon (D-GA)
22	Stephen Wallace Dorsey (R-AR)
23	Aaron A. Sargent (R-CA)
24	Simon B. Conover (R-FL)
25	Richard J. Oglesby (R-IL)
26	John J. Ingalls (R-KS)
27	Thomas C. McCreery (D-KY)
28	George R. Dennis (D-MD)
29	Lewis V. Bogy (D-MO)
30	Bainbridge Wadleigh (R-NH)
31	Augustus S. Merrimon (D-NC)
32	John H. Mitchell (R-OR)
33	John J. Patterson (R-SC)
34	William W. Eaton (D-CT)	February 5, 1875
35	Francis Cockrell (D-MO)	March 4, 1875
36	Henry L. Dawes (R-MA)
37	Charles W. Jones (D-FL)
38	Samuel J. R. McMillan (R-MN)
39	Samuel B. Maxey (D-TX)
40	Ambrose Burnside (R-RI)		Former governor
41	Newton Booth (AM-CA)		Former governor
42	Joseph E. McDonald (D-IN)		Former representative
43	William Pinkney Whyte (D-MD)
44	Blanche Bruce (R-MS)
45	Algernon Paddock (R-NE)
46	Theodore F. Randolph (D-NJ)		Former governor
47	Francis Kernan (D-NY)
48	William A. Wallace (D-PA)
49	Robert E. Withers (D-VA)
50	Isaac P. Christiancy (R-MI)
51	William Sharon (R-NV)
52	James B. Eustis (D-LA)	January 12, 1876
53	William H. Barnum (D-CT)	May 18, 1876
54	James G. Blaine (R-ME)	July 10, 1876	Former representative
55	Henry M. Teller (R-CO)	November 15, 1876
56	Jerome B. Chaffee (R-CO)	November 15, 1876
57	James E. Bailey (D-TN)	January 19, 1877
58	Frank Hereford (D-WV)	January 31, 1877
59	George F. Hoar (R-MA)	March 4, 1877	Former representative
60	Isham G. Harris (D-TN)		Former governor
61	John Tyler Morgan (D-AL)
62	John R. McPherson (D-NJ)
63	Matthew Butler (D-SC)
64	Richard Coke (D-TX)
65	Preston B. Plumb (R-KS)
66	James B. Beck (D-KY)
67	Lucius Q. C. Lamar (D-MS)
68	Augustus H. Garland (D-AR)
69	Benjamin H. Hill (D-GA)
70	David Davis (I-IL)
71	Samuel J. Kirkwood (R-IA)
72	Alvin Saunders (R-NE)
73	Edward H. Rollins (R-NH)
74	William P. Kellogg (R-LA)
75	La Fayette Grover (D-OR)		Former governor
	J. Donald Cameron (R-PA)	March 20, 1877
	Stanley Matthews (R-OH)	March 21, 1877
	David H. Armstrong (R-MO)	September 29, 1877
	Daniel W. Voorhees (D-IN)	November 6, 1877
	James Shields (R-MO)	January 27, 1879
	Zachariah Chandler (R-MI)	February 22, 1879

Notes

^ A Chronological List of United States Senators 1789-Present, via www.Senate.gov
^ 1871 U.S Census Report Contains 1870 Census results
^ 1881 U.S Census Report Contains 1880 Census results
^ 1891 U.S Census Report Contains 1890 Census results
^ Terms of service of senators that expired in 1879.
^ Terms of service of senators that expired in 1881.
^ Terms of service of senators that expired in 1883.