This is a complete list of members of the United States Senate during the 90th United States Congress listed by seniority, from January 3, 1967, to January 3, 1969.
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]
In this congress, J. William Fulbright (Arkansas) was the senior junior senator and Harry F. Byrd Jr. (Virginia) was the junior senior senator.
Senators who were sworn in during the middle of the two-year congressional term (up until the last senator who was not sworn in early after winning the November 1968 election) are listed at the end of the list with no number.
| Class | Terms of service of senators that expired in years |
|---|---|
| Class 3 | Terms of service of senators that expired in 1969 [4] |
| Class 1 | Terms of service of senators that expired in 1971 [5] |
| Class 2 | Terms of service of senators that expired in 1973 [6] |
| Rank | Senator (party-state) | Seniority date | Other factors |
|---|---|---|---|
| 1 | Carl Hayden (D-AZ) | March 4, 1927 | Former representative (15 years) |
| 2 | Richard Russell, Jr. (D-GA) | January 12, 1933 | Former governor |
| 3 | Allen J. Ellender (D-LA) | January 3, 1937 | |
| 4 | Joseph L. Hill (D-AL) | January 11, 1938 | Former representative (15 years) |
| 5 | George Aiken (R-VT) | January 10, 1941 | Former governor |
| 6 | James Eastland (D-MS) | January 3, 1943 | Previously a senator |
| 7 | John Little McClellan (D-AR) | Former representative (4 years) | |
| 8 | Warren G. Magnuson (D-WA) | December 14, 1944 | Former representative (7 years) |
| 9 | J. William Fulbright (D-AR) | January 3, 1945 | Former representative |
| 10 | Bourke B. Hickenlooper (R-IA) | Former governor | |
| 11 | Wayne Morse (D-OR) | ||
| 12 | Milton Young (R-ND) | March 12, 1945 | |
| 13 | Spessard Holland (D-FL) | September 24, 1946 | Former governor |
| 14 | John Sparkman (D-AL) | November 6, 1946 | Former representative (9 years, 10 months) |
| 15 | John J. Williams (R-DE) | January 3, 1947 | |
| 16 | John C. Stennis (D-MS) | November 17, 1947 | |
| 17 | Karl Mundt (R-SD) | December 31, 1948 | Former representative |
| 18 | Russell B. Long (D-LA) | ||
| 19 | Margaret Chase Smith (R-ME) | January 3, 1949 | Former representative |
| 20 | Clinton Anderson (D-NM) | ||
| 21 | Frank Carlson (R-KS) | November 27, 1950 | Former representative (12 years), Former governor |
| 22 | John O. Pastore (D-RI) | December 19, 1950 | |
| 23 | Everett Dirksen (R-IL) | January 3, 1951 | Former representative (16 years) |
| 24 | Almer Monroney (D-OK) | Former representative (12 years) | |
| 25 | George Smathers (D-FL) | Former representative (4 years) | |
| 26 | Wallace F. Bennett (R-UT) | ||
| 27 | Thomas Kuchel (R-CA) | January 2, 1953 | |
| 28 | Albert Gore, Sr. (D-TN) | January 3, 1953 | Former representative (14 years) |
| 29 | Henry M. Jackson (D-WA) | Former representative (12 years) | |
| 30 | Mike Mansfield (D-MT) | Former representative (10 years) | |
| 31 | Stuart Symington (D-MO) | ||
| 32 | Sam Ervin (D-NC) | June 5, 1954 | Former representative |
| 33 | Norris Cotton (R-NH) | November 8, 1954 | Former representative (7 years, 10 months) |
| 34 | Roman Hruska (R-NE) | Former representative (1 year, 10 months) | |
| 35 | Alan Bible (D-NV) | December 2, 1954 | |
| 36 | Carl Curtis (R-NE) | January 1, 1955 | Former representative (15 years) |
| 37 | Clifford P. Case (R-NJ) | January 3, 1955 | Former representative |
| 38 | Gordon L. Allott (R-CO) | ||
| 39 | John Sherman Cooper (R-KY) | November 7, 1956 | Previously a senator (twice) (total tenure 4 years, 4 months) |
| 40 | Strom Thurmond (R-SC) | Previously a senator (1 year, 3 months) | |
| 41 | Thruston Ballard Morton [7] (R-KY) | January 3, 1957 | Former representative |
| 42 | Frank J. Lausche (D-OH) | Former governor, Ohio 5th in population (1950) | |
| 43 | Herman Talmadge (D-GA) | Former governor, Georgia 13th in population (1950) | |
| 44 | Joseph S. Clark (D-PA) | Pennsylvania 3rd in population (1950) | |
| 45 | Frank Church (D-ID) | Idaho 43rd in population (1950) | |
| 46 | Jacob K. Javits (R-NY) | January 9, 1957 | Former representative (7 years) |
| 47 | Ralph Yarborough (D-TX) | April 29, 1957 | |
| 48 | William Proxmire (D-WI) | August 28, 1957 | |
| 49 | B. Everett Jordan (D-NC) | April 19, 1958 | |
| 50 | Jennings Randolph (D-WV) | November 5, 1958 | Former representative (14 years) |
| 51 | Hugh Scott (R-PA) | January 3, 1959 | Former representative (18 years) |
| 52 | Eugene McCarthy (D-MN) | Former representative (10 years) | |
| 53 | Stephen Young (D-OH) | Former representative (8 years), Ohio 5th in population (1950) | |
| 54 | Winston L. Prouty (R-VT) | Former representative (8 years), Vermont 46th in population (1950) | |
| 55 | Robert Byrd (D-WV) | Former representative (6 years) | |
| 56 | Harrison A. Williams (D-NJ) | Former representative (4 years), New Jersey 8th in population (1950) | |
| 57 | Thomas J. Dodd (D-CT) | Former representative (4 years), Connecticut 34th in population (1950) | |
| 58 | Edward L. Bartlett [8] (D-AK) | Former delegate | |
| 59 | Edmund Muskie (D-ME) | Former governor, Maine 35th in population (1950) | |
| 60 | Ernest Gruening (D-AK) | Former Territorial Governor, Alaska 50th in population (1950) | |
| 61 | Philip Hart (D-MI) | Michigan 7th in population (1950) | |
| 62 | Vance Hartke (D-IN) | Indiana 11th in population (1950) | |
| 63 | Frank Moss (D-UT) | Utah 38th in population (1950) | |
| 64 | Gale W. McGee (D-WY) | Wyoming 48th in population (1950) | |
| 65 | Howard Cannon (D-NV) | Nevada 49th in population (1950) | |
| 66 | Hiram Fong (R-HI) | August 21, 1959 | |
| 67 | Quentin Northrup Burdick (D-ND) | August 8, 1960 | Former representative |
| 68 | Edward V. Long (D-MO) | September 23, 1960 | |
| 69 | Lee Metcalf (D-MT) | January 3, 1961 | Former representative (8 years) |
| 70 | James Boggs (R-DE) | Former representative (6 years) | |
| 71 | Jack Miller (R-IA) | Iowa 22nd in population (1950) | |
| 72 | Claiborne Pell (D-RI) | Rhode Island 36th in population (1950) | |
| 73 | John Tower (R-TX) | June 15, 1961 | |
| 74 | James B. Pearson (R-KS) | January 31, 1962 | |
| 75 | Leonard B. Jordan (R-ID) | August 6, 1962 | |
| 76 | Ted Kennedy (D-MA) | November 7, 1962 | Massachusetts 9th in population (1960) |
| 77 | Thomas J. McIntyre (D-NH) | New Hampshire 45th in population (1960) | |
| 78 | Abraham A. Ribicoff (D-CT) | January 3, 1963 | Former representative (4 years), former cabinet secretary, former governor |
| 79 | Daniel Brewster (D-MD) | Former representative (4 years) - Maryland 21st in population (1960) | |
| 89 | George McGovern (D-SD) | Former representative (4 years) - South Dakota 40th in population (1960) | |
| 81 | Daniel Inouye (D-HI) | Former representative (4 years) - Hawaii 43rd in population (1960) | |
| 82 | Peter H. Dominick (R-CO) | Former representative (2 years) | |
| 83 | Birch Bayh (D-IN) | ||
| 84 | Gaylord Nelson (D-WI) | January 7, 1963 | Former governor |
| 85 | Joseph Montoya (D-NM) | November 4, 1964 | Former representative |
| 86 | Fred R. Harris (D-OK) | ||
| 87 | Walter Mondale (D-MN) | December 30, 1964 | |
| 88 | George Murphy (R-CA) | January 1, 1965 | |
| 89 | Joseph Tydings (D-MD) | January 3, 1965 | Former representative |
| 90 | Robert F. Kennedy [9] (D-NY) | Former cabinet member | |
| 91 | Paul Fannin (R-AZ) | Former governor | |
| 92 | Harry F. Byrd, Jr. (D-VA) | November 12, 1965 | |
| 93 | Robert P. Griffin (R-MI) | May 11, 1966 | |
| 94 | Ernest Hollings (D-SC) | November 9, 1966 | Former governor |
| 95 | William B. Spong, Jr. (D-VA) | December 31, 1966 | |
| 96 | Clifford Hansen (R-WY) | January 3, 1967 | Former governor |
| 97 | Charles H. Percy (R-IL) | Illinois 4th in population (1960) | |
| 98 | Edward Brooke (R-MA) | Massachusetts 9th in population (1960) | |
| 99 | Howard Baker (R-TN) | Tennessee 17th in population (1960) | |
| 100 | Mark Hatfield (R-OR) | January 10, 1967 | Former governor |
| 101 | Charles Goodell (R-NY) | September 10, 1968 | |
| 102 | Marlow Cook (R-KY) | December 17, 1968 | |
| 103 | Ted Stevens (R-AK) | December 24, 1968 | |
| 104 | Thomas Eagleton (D-MO) | December 28, 1968 |