Senate
United States elections · 1966 · held
State Senate races in this midterm cycle, with separate candidate results and election-era ideology attribution.
State races and results map
Each race has its own denominator. Missing counts are blank. The interactive map uses modern state outlines as navigation references.
Alabama — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| John Sparkman | Democratic | — | 60.10% | Elected |
| John Grenier | Republican | — | 39.00% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y John Sparkman (Democratic) 60.1%
▌John Grenier (Republican) 39.0%
Sources & further reading
Alaska — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Bob Bartlett | Democratic | — | 75.50% | Elected |
| Lee McKinley | Republican | — | 24.50% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Bob Bartlett (Democratic) 75.5%
▌Lee McKinley (Republican) 24.5%
Sources & further reading
Arkansas — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| John L. McClellan | Democratic | — | — | Elected |
Incumbent re-elected. Source candidate / selection detail: ▌Y John L. McClellan (Democratic)
Unopposed
Sources & further reading
Colorado — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Gordon Allott | Republican | — | 58.00% | Elected |
| Roy Romer | Democratic | — | 41.90% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Gordon Allott (Republican) 58.0%
▌Roy Romer (Democratic) 41.9%
Sources & further reading
Delaware — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| J. Caleb Boggs | Republican | 97268 | 59.12% | Elected |
| James M. Tunnell Jr. | Democratic | 67263 | 40.88% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y J. Caleb Boggs (Republican) 59.1%
▌James M. Tunnell Jr. (Democratic) 40.9%
Sources & further reading
Georgia — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Richard Russell Jr. | Democratic | 631002 | 99.95% | Elected |
| Scattering | None | 328 | 0.05% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Richard Russell Jr. (Democratic)
Unopposed
Sources & further reading
Idaho — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Len Jordan | Republican | 139819 | 55.38% | Elected |
| Ralph R. Harding | Democratic | 112637 | 44.62% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Len Jordan (Republican) 55.4%
▌Ralph R. Harding (Democratic) 44.6%
Sources & further reading
Illinois — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Charles H. Percy | Republican | — | 55.00% | Elected |
| Paul Douglas | Democratic | — | 43.90% | — |
Incumbent lost re-election. Republican gain. Source candidate / selection detail: ▌Y Charles H. Percy (Republican) 55.0%
▌Paul Douglas (Democratic) 43.9%
Sources & further reading
Iowa — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Jack Miller | Republican | — | 60.90% | Elected |
| Elbert B. Smith | Democratic | — | 37.80% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Jack Miller (Republican) 60.9%
▌Elbert B. Smith (Democratic) 37.8%
Sources & further reading
Kansas — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| James B. Pearson | Republican | 350077 | 52.15% | Elected |
| James Floyd Breeding | Democratic | 303223 | 45.17% | — |
| Earl F. Dodge | Prohibition | 9364 | 1.39% | — |
| George W. Snell | Conservative | 7103 | 1.06% | — |
| Scattering | None | 1578 | 0.24% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y James B. Pearson (Republican) 52.2%
▌James Floyd Breeding (Democratic) 45.2%
Sources & further reading
Kentucky — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| John Sherman Cooper | Republican | — | 64.50% | Elected |
| John Y. Brown Sr. | Democratic | — | 35.50% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y John Sherman Cooper (Republican) 64.5%
▌John Y. Brown Sr. (Democratic) 35.5%
Sources & further reading
Louisiana — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Allen J. Ellender | Democratic | 437695 | 100.00% | Elected |
Incumbent re-elected. Source candidate / selection detail: ▌Y Allen J. Ellender (Democratic)
Unopposed
Sources & further reading
Maine — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Margaret Chase Smith | Republican | 188291 | 58.93% | Elected |
| Elmer H. Violette | Democratic | 131136 | 41.04% | — |
| Scattering | None | 108 | 0.03% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Margaret Chase Smith (Republican) 59.0%
▌Elmer H. Violette (Democratic) 41.1%
Sources & further reading
Massachusetts — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Edward Brooke | Republican | 1213473 | 60.68% | Elected |
| Endicott Peabody | Democratic | 774761 | 38.74% | — |
| Lawrence Gilfedder | Socialist Labor | 6790 | 0.34% | — |
| Mark R. Shaw | Prohibition | 4833 | 0.24% | — |
Incumbent retired. Republican hold. Source candidate / selection detail: ▌Y Edward Brooke (Republican) 60.7%
▌Endicott Peabody (Democratic) 38.7%
Sources & further reading
Michigan — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Robert P. Griffin | Republican | 1363808 | 55.88% | Elected |
| G. Mennen Williams | Democratic | 1070484 | 43.86% | — |
| Ralph M. Muncy | Socialist Labor | 6166 | 0.25% | — |
| Scattering | None | 185 | 0.01% | — |
Interim appointee elected. Source candidate / selection detail: ▌Y Robert P. Griffin (Republican) 55.9%
▌G. Mennen Williams (Democratic) 43.8%
Sources & further reading
Minnesota — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Walter Mondale | DFL | — | 53.90% | Elected |
| Robert A. Forsythe | Republican | — | 45.20% | — |
Interim appointee elected. Source candidate / selection detail: ▌Y Walter Mondale (DFL) 53.9%
▌Robert A. Forsythe (Republican) 45.2%
Sources & further reading
Mississippi — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| James Eastland | Democratic | — | 65.50% | Elected |
| Prentiss Walker | Republican | — | 26.80% | — |
| Clifton R. Whitley | Independent | — | 7.80% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y James Eastland (Democratic) 65.5%
▌Prentiss Walker (Republican) 26.8%
▌Clifton R. Whitley (Independent) 7.8%
Sources & further reading
Montana — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Lee Metcalf | Democratic | — | 53.20% | Elected |
| Tim Babcock | Republican | — | 46.80% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Lee Metcalf (Democratic) 53.2%
▌Tim Babcock (Republican) 46.8%
Sources & further reading
Nebraska — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Carl Curtis | Republican | 296116 | 61.04% | Elected |
| Frank B. Morrison | Democratic | 187950 | 38.74% | — |
| Scattering | None | 1032 | 0.21% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Carl Curtis (Republican) 61.2%
▌Frank B. Morrison (Democratic) 38.8%
Sources & further reading
New Hampshire — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Thomas J. McIntyre | Democratic | — | 54.00% | Elected |
| Harrison Thyng | Republican | — | 45.90% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Thomas J. McIntyre (Democratic) 54.0%
▌Harrison Thyng (Republican) 45.9%
Sources & further reading
New Jersey — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Clifford P. Case | Republican | 1278843 | 60.02% | Elected |
| Warren W. Wilentz | Democratic | 788021 | 36.98% | — |
| Robert Lee Schlachter | Conservative | 53606 | 2.52% | — |
| Julius Levin | Socialist Labor | 10218 | 0.48% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Clifford P. Case (Republican) 60.0%
▌Warren W. Wilentz (Democratic) 37.0%
Sources & further reading
New Mexico — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Clinton Anderson | Democratic | 137205 | 53.14% | Elected |
| Anderson Carter | Republican | 120988 | 46.86% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Clinton Anderson (Democratic) 53.1%
▌Anderson Carter (Republican) 46.9%
Sources & further reading
North Carolina — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| B. Everett Jordan | Democratic | 501440 | 55.59% | Elected |
| John S. Shallcross | Republican | 400502 | 44.40% | — |
| Donald R. Badgley | Write-In | 36 | 0.00% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y B. Everett Jordan (Democratic) 55.6%
▌John S. Shallcross (Republican) 44.4%
Sources & further reading
Oklahoma — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Fred R. Harris | Democratic | — | 53.70% | Elected |
| Pat J. Patterson | Republican | — | 46.30% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Fred R. Harris (Democratic) 53.7%
▌Pat J. Patterson (Republican) 46.3%
Sources & further reading
Oregon — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Mark Hatfield | Republican | 354391 | 51.75% | Elected |
| Robert B. Duncan | Democratic | 330374 | 48.25% | — |
Incumbent retired. Republican gain. Winner delayed start of term until January 10, 1967, in order to finish his term as Governor of Oregon. Source candidate / selection detail: ▌Y Mark Hatfield (Republican) 51.7%
▌Robert B. Duncan (Democratic) 48.2%
Sources & further reading
Rhode Island — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Claiborne Pell | Democratic | 219331 | 67.66% | Elected |
| Ruth M. Briggs | Republican | 104838 | 32.34% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Claiborne Pell (Democratic) 67.7%
▌Ruth M. Briggs (Republican) 32.3%
Sources & further reading
South Carolina — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Strom Thurmond | Republican | 271297 | 62.20% | Elected |
| Bradley Morrah | Democratic | 164955 | 37.80% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Strom Thurmond (Republican) 62.2%
▌Bradley Morrah (Democratic) 37.8%
Sources & further reading
South Carolina — Senate (Class 3) — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Fritz Hollings | Democratic | 223790 | 51.30% | Elected |
| Marshall Parker | Republican | 212032 | 48.70% | — |
Interim appointee lost nomination. Democratic hold. Source candidate / selection detail: ▌Y Fritz Hollings (Democratic) 51.4%
▌Marshall Parker (Republican) 48.7%
Sources & further reading
South Dakota — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Karl Mundt | Republican | — | 66.30% | Elected |
| Donn H. Wright | Democratic | — | 33.70% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Karl Mundt (Republican) 66.3%
▌Donn H. Wright (Democratic) 33.7%
Sources & further reading
Tennessee — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Howard Baker | Republican | 483063 | 55.72% | Elected |
| Frank G. Clement | Democratic | 383843 | 44.27% | — |
| Write-Ins | None | 55 | 0.01% | — |
Incumbent lost renomination. Republican gain. Source candidate / selection detail: ▌Y Howard Baker (Republican) 55.7%
▌Frank G. Clement (Democratic) 44.3%
Sources & further reading
Texas — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| John Tower | Republican | 841501 | 56.39% | Elected |
| Waggoner Carr | Democratic | 643855 | 43.15% | — |
| James Baker Holland | Constitution | 6778 | 0.45% | — |
| Scattering | None | 45 | 0.00% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y John Tower (Republican) 56.4%
▌Waggoner Carr (Democratic) 43.1%
Sources & further reading
Virginia — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| William Spong Jr. | Democratic | — | 58.60% | Elected |
| James P. Ould Jr. | Republican | — | 33.50% | — |
| F. Lee Hawthorne | Conservative | — | 7.90% | — |
Incumbent lost renomination. Democratic hold. Incumbent resigned December 30, 1966 to give successor preferential seniority. Winner seated December 31, 1966. Source candidate / selection detail: ▌Y William Spong Jr. (Democratic) 58.6%
▌James P. Ould Jr. (Republican) 33.5%
▌F. Lee Hawthorne (Conservative) 7.9%
Sources & further reading
Virginia — Senate (Class 1) — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Harry F. Byrd Jr. | Democratic | 389028 | 53.30% | Elected |
| Lawrence M. Traylor | Republican | 272804 | 37.38% | — |
| John W. Carter | Independent | 57692 | 7.90% | — |
| J.B. Brayman | Independent | 10180 | 1.39% | — |
Interim appointee elected. Source candidate / selection detail: ▌Y Harry F. Byrd Jr. (Democratic) 53.3%
▌Lawrence M. Traylor (Republican) 37.4%
▌John W. Carter (Independent) 7.9%
Sources & further reading
West Virginia — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Jennings Randolph | Democratic | 292325 | 59.51% | Elected |
| Francis J. Love | Republican | 198891 | 40.49% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Jennings Randolph (Democratic) 59.5%
▌Francis J. Love (Republican) 40.5%
Sources & further reading
Wyoming — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Clifford Hansen | Republican | 63548 | 51.80% | Elected |
| Teno Roncalio | Democratic | 59141 | 48.20% | — |
Incumbent retired. Republican hold. Source candidate / selection detail: ▌Y Clifford Hansen (Republican) 51.8%
▌Teno Roncalio (Democratic) 48.2%
Sources & further reading
Results: final · partial coverage · Elected candidates in regular races; continuing senators are not included
| Party / candidate | Votes | Vote share | Seats | Electoral votes |
|---|---|---|---|---|
| John Sparkman · Alabama | — | — | 1 | — |
| Bob Bartlett · Alaska | — | — | 1 | — |
| John L. McClellan · Arkansas | — | — | 1 | — |
| Gordon Allott · Colorado | — | — | 1 | — |
| J. Caleb Boggs · Delaware | — | — | 1 | — |
| Richard Russell Jr. · Georgia | — | — | 1 | — |
| Len Jordan · Idaho | — | — | 1 | — |
| Charles H. Percy · Illinois | — | — | 1 | — |
| Jack Miller · Iowa | — | — | 1 | — |
| James B. Pearson · Kansas | — | — | 1 | — |
| John Sherman Cooper · Kentucky | — | — | 1 | — |
| Allen J. Ellender · Louisiana | — | — | 1 | — |
| Margaret Chase Smith · Maine | — | — | 1 | — |
| Edward Brooke · Massachusetts | — | — | 1 | — |
| Robert P. Griffin · Michigan | — | — | 1 | — |
| Walter Mondale · Minnesota | — | — | 1 | — |
| James Eastland · Mississippi | — | — | 1 | — |
| Lee Metcalf · Montana | — | — | 1 | — |
| Carl Curtis · Nebraska | — | — | 1 | — |
| Thomas J. McIntyre · New Hampshire | — | — | 1 | — |
| Clifford P. Case · New Jersey | — | — | 1 | — |
| Clinton Anderson · New Mexico | — | — | 1 | — |
| B. Everett Jordan · North Carolina | — | — | 1 | — |
| Fred R. Harris · Oklahoma | — | — | 1 | — |
| Mark Hatfield · Oregon | — | — | 1 | — |
| Claiborne Pell · Rhode Island | — | — | 1 | — |
| Strom Thurmond · South Carolina | — | — | 1 | — |
| Karl Mundt · South Dakota | — | — | 1 | — |
| Howard Baker · Tennessee | — | — | 1 | — |
| John Tower · Texas | — | — | 1 | — |
| William Spong Jr. · Virginia | — | — | 1 | — |
| Jennings Randolph · West Virginia | — | — | 1 | — |
| Clifford Hansen · Wyoming | — | — | 1 | — |
The seat diagram shows only regular seats contested in this cycle, not the full Senate. Special races remain available in the state selector. Early cycles span two years and use legislative selection; missing or non-comparable vote totals are left blank. Candidate ideology is used where sourced; otherwise the broad election-era party tradition is used. Unassessed candidates are not assigned an ideology.
Sources & further reading
U.S. Senate historical party divisions