Senate
United States elections · 1918 · 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 H. Bankhead | Democratic | 54880 | 100.00% | Elected |
Incumbent re-elected. Source candidate / selection detail: ▌Y John H. Bankhead (Democratic)
Unopposed
Sources & further reading
Arkansas — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Joseph T. Robinson | Democratic | 78377 | 100.00% | Elected |
Incumbent re-elected. Source candidate / selection detail: ▌Y Joseph T. Robinson (Democratic)
Unopposed
Sources & further reading
Colorado — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Lawrence C. Phipps | Republican | 107726 | 49.49% | Elected |
| John F. Shafroth | Democratic | 104347 | 47.94% | — |
| P. A. Richardson | Prohibition | 5606 | 2.58% | — |
Incumbent lost re-election. New senator elected. Republican gain. Source candidate / selection detail: ▌Y Lawrence C. Phipps (Republican) 49.49%
▌John F. Shafroth (Democratic) 47.94%
▌P. A. Richardson (Prohibition) 2.58%
Sources & further reading
Delaware — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| L. Heisler Ball | Republican | — | 51.17% | Elected |
| Willard Saulsbury Jr. | Democratic | — | 47.83% | — |
| William H. Connor | Socialist | — | 1.00% | — |
Incumbent lost re-election. New senator elected. Republican gain. Source candidate / selection detail: ▌Y L. Heisler Ball (Republican) 51.17%
▌Willard Saulsbury Jr. (Democratic) 47.83%
▌William H. Connor (Socialist) 1.0%
Sources & further reading
Georgia — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| William J. Harris | Democratic | — | 88.34% | Elected |
| G. H. Williams | Republican | — | 11.66% | — |
Incumbent lost renomination. New senator elected. Democratic hold. Source candidate / selection detail: ▌Y William J. Harris (Democratic) 88.34%
▌G. H. Williams (Republican) 11.66%
Sources & further reading
Idaho — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| William Borah | Republican | — | 67.21% | Elected |
| Frank L. Moore | Democratic | — | 32.79% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y William Borah (Republican) 67.21%
▌Frank L. Moore (Democratic) 32.79%
Sources & further reading
Idaho — Senate (Class 3) — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| John F. Nugent | Democratic | — | 50.50% | Elected |
| Frank R. Gooding | Republican | — | 49.50% | — |
Interim appointee elected November 5, 1918. Source candidate / selection detail: ▌Y John F. Nugent (Democratic) 50.5%
▌Frank R. Gooding (Republican) 49.5%
Sources & further reading
Illinois — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Medill McCormick | Republican | 479983 | 50.50% | Elected |
| James Hamilton Lewis | Democratic | 426943 | 44.92% | — |
| William Bross Lloyd | Socialist | 37167 | 3.91% | — |
| John M. Francis | Socialist Labor | 3268 | 0.34% | — |
| Frank B. Vennum | Prohibition | 3151 | 0.33% | — |
Incumbent lost re-election. New senator elected. Republican gain. Source candidate / selection detail: ▌Y Medill McCormick (Republican) 50.5%
▌J. Hamilton Lewis (Democratic) 44.92%
▌William B. Lloyd (Socialist) 3.91%
▌John M. Francis (Socialist Labor) 0.34%
Sources & further reading
Iowa — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| William S. Kenyon | Republican | — | 65.40% | Elected |
| Charles Rollin Keyes | Democratic | — | 34.60% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y William S. Kenyon (Republican) 65.4%
▌Charles Rollin Keyes (Democratic) 34.6%
Sources & further reading
Kansas — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Arthur Capper | Republican | — | 63.69% | Elected |
| William H. Thompson | Democratic | — | 33.73% | — |
| Eva Harding | Socialist | — | 2.58% | — |
Incumbent lost re-election. New senator elected. Republican gain. Source candidate / selection detail: ▌Y Arthur Capper (Republican) 63.69%
▌William H. Thompson (Democratic) 33.73%
▌Eva Harding (Socialist) 2.58%
Sources & further reading
Kentucky — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Augustus O. Stanley | Democratic | — | 50.77% | Elected |
| Ben Bruner | Republican | — | 49.23% | — |
Incumbent retired. New senator elected. Democratic hold. Source candidate / selection detail: ▌Y Augustus O. Stanley (Democratic) 50.77%
▌Ben Bruner (Republican) 49.23%
Sources & further reading
Louisiana — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Joseph E. Ransdell | Democratic | — | — | Elected |
Incumbent re-elected. Source candidate / selection detail: ▌Y Joseph E. Ransdell (Democratic)
Unopposed
Sources & further reading
Louisiana — Senate (Class 3) — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Edward J. Gay | Democratic | — | — | Elected |
Interim appointee retired. New senator elected November 5, 1918. Democratic hold. Source candidate / selection detail: ▌Y Edward J. Gay (Democratic)
Unopposed
Sources & further reading
Maine — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Bert M. Fernald | Republican | — | 55.40% | Elected |
| Elmer E. Newbert | Democratic | — | 44.60% | — |
Incumbent re-elected September 9, 1918. Source candidate / selection detail: ▌Y Bert M. Fernald (Republican) 55.4%
▌Elmer E. Newbert (Democratic) 44.6%
Sources & further reading
Massachusetts — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| David I. Walsh | Democratic | — | 49.67% | Elected |
| John W. Weeks | Republican | — | 45.07% | — |
| Thomas W. Lawson | Independent | — | 5.26% | — |
Incumbent lost re-election. New senator elected. Democratic gain. Source candidate / selection detail: ▌Y David I. Walsh (Democratic) 49.67%
▌John W. Weeks (Republican) 45.07%
▌Thomas W. Lawson (Independent) 5.26%
Sources & further reading
Michigan — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Truman H. Newberry | Republican | — | 50.19% | Elected |
| Henry Ford | Democratic | — | 48.47% | — |
| E. O. Foss | Socialist | — | 1.09% | — |
| William Faull | Prohibition | — | 0.26% | — |
Incumbent retired. New senator elected. Republican hold. Source candidate / selection detail: ▌Y Truman H. Newberry (Republican) 50.19%
▌Henry Ford (Democratic) 48.47%
Others
▌E. O. Foss (Socialist) 1.09%
▌William Faull (Prohibition) 0.26%
Sources & further reading
Minnesota — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Knute Nelson | Republican | — | 60.05% | Elected |
| Willis G. Calderwood | National | — | 39.95% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Knute Nelson (Republican) 60.05%
▌Willis G. Calderwood (National) 39.95%
Sources & further reading
Mississippi — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Pat Harrison | Democratic | — | 95.04% | Elected |
| Summer W. Rose | Socialist | — | 4.96% | — |
Incumbent lost renomination. New senator elected. Source candidate / selection detail: ▌Y Pat Harrison (Democratic) 95.04%
▌Summer W. Rose (Socialist) 4.96%
Sources & further reading
Missouri — Senate (Class 3) — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Selden P. Spencer | Republican | — | 52.39% | Elected |
| Joseph W. Folk | Democratic | — | 46.29% | — |
| Caleb Lipscomb | Socialist | — | 1.16% | — |
| William Wesley Cox | Socialist Labor | — | 0.16% | — |
Interim appointee lost nomination. New senator elected November 5, 1918. Republican gain. Source candidate / selection detail: ▌Y Selden P. Spencer (Republican) 52.39%
▌Joseph W. Folk (Democratic) 46.29%
Others
▌Caleb Lipscomb (Socialist) 1.16%
▌William Wesley Cox (Socialist Labor) 0.16%
Sources & further reading
Montana — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Thomas J. Walsh | Democratic | — | 41.07% | Elected |
| Oscar Lanstrum | Republican | — | 35.79% | — |
| Jeannette Rankin | National | — | 23.14% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Thomas J. Walsh (Democratic) 41.07%
▌Oscar Lanstrum (Republican) 35.79%
▌Jeannette Rankin (National) 23.14%
Sources & further reading
Nebraska — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| George W. Norris | Republican | — | 54.52% | Elected |
| John H. Morehead | Democratic | — | 45.49% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y George W. Norris (Republican) 54.52%
▌John H. Morehead (Democratic) 45.49%
Sources & further reading
Nevada — Senate (Class 3) — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Charles Henderson | Democratic | — | 47.71% | Elected |
| Edwin E. Roberts | Republican | — | 31.50% | — |
| Anne Henrietta Martin | Independent | — | 18.01% | — |
| Martin Scanlan | Socialist | — | 2.78% | — |
Interim appointee elected November 5, 1918. Source candidate / selection detail: ▌Y Charles Henderson (Democratic), 47.71%
▌Edwin E. Roberts (Republican) 31.5%
▌Anne Henrietta Martin (Independent) 18.01%
▌Martin Scanlan (Socialist) 2.78%
Sources & further reading
New Hampshire — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Henry W. Keyes | Republican | — | 53.54% | Elected |
| Eugene E. Reed | Democratic | — | 46.46% | — |
Incumbent retired. New senator elected. Republican gain. Source candidate / selection detail: ▌Y Henry W. Keyes (Republican) 53.54%
▌Eugene E. Reed (Democratic) 46.46%
Sources & further reading
New Hampshire — Senate (Class 3) — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| George H. Moses | Republican | — | 50.76% | Elected |
| John B. Jameson | Democratic | — | 49.24% | — |
Interim appointee retired. New senator elected November 5, 1918. Republican hold. Source candidate / selection detail: ▌Y George H. Moses (Republican) 50.76%
▌John B. Jameson (Democratic) 49.24%
Sources & further reading
New Jersey — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Walter E. Edge | Republican | — | 50.34% | Elected |
| George M. La Monte | Democratic | — | 43.23% | — |
| James M. Reilly | Socialist | — | 4.14% | — |
| Grafton Day | Prohibition | — | 1.62% | — |
| William J. Wallace | Single Tax | — | 0.66% | — |
Interim appointee retired. New senator elected. Republican hold. Interim appointee (Baird) was elected to finish the current term; see above. Source candidate / selection detail: ▌Y Walter E. Edge (Republican) 50.34%
▌George M. La Monte (Democratic) 43.23%
▌James M. Reilly (Socialist) 4.14%
Others
▌Grafton Day (Prohibition) 1.62%
▌William J. Wallace (Single Tax) 0.66%
Sources & further reading
New Jersey — Senate (Class 2) — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| David Baird | Republican | — | 49.17% | Elected |
| Charles O. Hennessy | Democratic | — | 44.64% | — |
| James M. Reilly | Socialist | — | 3.82% | — |
| Grafton Day | Prohibition | — | 2.38% | — |
Interim appointee elected November 5, 1918. Interim appointee was not a candidate for the next term; see below. Source candidate / selection detail: ▌Y David Baird (Republican) 49.17%
▌Charles O. Hennessy (Democratic) 44.64%
▌James M. Reilly (Socialist) 3.82%
▌Grafton Day (Prohibition) 2.38%
Sources & further reading
New Mexico — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Albert B. Fall | Republican | — | 51.40% | Elected |
| William B. Walton | Democratic | — | 47.48% | — |
| W. P. Metcalf | Socialist | — | 1.12% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Albert B. Fall (Republican) 51.4%
▌William B. Walton (Democratic) 47.48%
▌W. P. Metcalf (Socialist) 1.12%
Sources & further reading
North Carolina — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| F. M. Simmons | Democratic | — | 60.50% | Elected |
| John M. Morehead | Republican | — | 39.50% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y F. M. Simmons (Democratic) 60.5%
▌John M. Morehead (Republican) 39.5%
Sources & further reading
Oklahoma — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Robert L. Owen | Democratic | — | 55.44% | Elected |
| W. B. Johnson | Republican | — | 40.73% | — |
| C. M. Greenland | Socialist | — | 3.83% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Robert L. Owen (Democratic) 55.44%
▌W. B. Johnson (Republican) 40.73%
▌C. M. Greenland (Socialist) 3.83%
Sources & further reading
Oregon — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Charles L. McNary | Republican | — | 54.17% | Elected |
| Oswald West | Democratic | — | 42.30% | — |
| Albert Slaughter | Socialist | — | 3.53% | — |
Interim appointee elected to the next term but not to finish the term. Winner appointed to begin next term early when winner of the special election (see above) resigned. Source candidate / selection detail: ▌Y Charles L. McNary (Republican) 54.17%
▌Oswald West (Democratic) 42.3%
▌Albert Slaughter (Socialist) 3.53%
Sources & further reading
Oregon — Senate (Class 2) — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Frederick W. Mulkey | Republican | — | 84.53% | Elected |
| Martha Bean | Socialist | — | 15.47% | — |
Interim appointee retired. New senator elected November 5, 1918. Republican hold. Interim appointee was instead elected to the next term; see below. Mulkey took the seat but subsequently resigned so McNary could be re-appointed ahead of the term. Source candidate / selection detail: ▌Y Frederick W. Mulkey (Republican) 84.53%
▌Martha Bean (Socialist) 15.47%
Sources & further reading
Rhode Island — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| LeBaron B. Colt | Republican | — | 51.76% | Elected |
| George F. O'Shaunessy | Democratic | — | 46.24% | — |
| Frederick W. Hunt | Socialist | — | 2.00% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y LeBaron B. Colt (Republican) 51.76%
▌George F. O'Shaunessy (Democratic) 46.24%
▌Frederick W. Hunt (Socialist) 2.0%
Sources & further reading
South Carolina — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Nathaniel B. Dial | Democratic | 65064 | 58.70% | Elected |
| Cole L. Blease | Democratic | 40456 | 36.50% | — |
| James F. Rice | Democratic | 5317 | 4.80% | — |
Interim appointee retired. New senator elected. Democratic hold. Neither the interim appointee nor the winner were elected to finish the current term; see above. Source candidate / selection detail: ▌Y Nathaniel B. Dial (Democratic)
Unopposed
Sources & further reading
South Carolina — Senate (Class 2) — First round
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| William P. Pollock | Democratic | 38816 | 34.91% | Advancing to runoff |
| Thomas H. Peeples | Democratic | 37567 | 33.79% | Advancing to runoff |
| Christie Benet | Democratic | 34807 | 31.30% | — |
First round of this seat election. The elected candidate is recorded in the separate runoff race. Excluded from the Senate diagram to avoid counting the same seat twice.
Sources & further reading
South Carolina — Senate (Class 2) — Runoff
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| William P. Pollock | Democratic | 49920 | 62.43% | Elected |
| Thomas H. Peeples | Democratic | 30044 | 37.57% | — |
Interim appointee lost renomination. New senator elected November 5, 1918. Democratic hold. Neither the interim appointee nor the winner were elected to the next term; see below. Source candidate / selection detail: ▌Y William P. Pollock (Democratic)
Unopposed
Sources & further reading
South Dakota — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Thomas Sterling | Republican | — | 55.07% | Elected |
| W. T. Rinehart | Democratic | — | 38.95% | — |
| Orville Rafferty | Independent | — | 5.98% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Thomas Sterling (Republican) 55.07%
▌W. T. Rinehart (Democratic) 38.95%
▌Orville Rafferty (Independent) 5.98%
Sources & further reading
Tennessee — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| John K. Shields | Democratic | — | 62.17% | Elected |
| H. Clay Evans | Republican | — | 37.83% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y John K. Shields (Democratic) 62.17%
▌H. Clay Evans (Republican) 37.83%
Sources & further reading
Texas — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Morris Sheppard | Democratic | — | 86.69% | Elected |
| J. Webster Flanagan | Republican | — | 12.41% | — |
| M. A. Smith | Socialist | — | 0.90% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Morris Sheppard (Democratic) 86.69%
▌J. Webster Flanagan (Republican) 12.41%
▌M. A. Smith (Socialist) 0.9%
Sources & further reading
Virginia — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Thomas S. Martin | Democratic | — | — | Elected |
Incumbent re-elected. Source candidate / selection detail: ▌Y Thomas S. Martin (Democratic)
Unopposed
Sources & further reading
West Virginia — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Davis Elkins | Republican | — | 53.53% | Elected |
| Clarence W. Watson | Democratic | — | 45.40% | — |
| D. M. S. Holt | Socialist | — | 1.06% | — |
Incumbent retired. New senator elected. Republican hold. Source candidate / selection detail: ▌Y Davis Elkins (Republican) 53.53%
▌Clarence W. Watson (Democratic) 45.4%
▌D. M. S. Holt (Socialist) 1.06%
Sources & further reading
Wisconsin — Senate (Class 3) — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Irvine Lenroot | Republican | 163983 | 38.73% | Elected |
| Joseph E. Davies | Democratic | 148923 | 35.12% | — |
| Victor L. Berger | Socialist | 110487 | 26.09% | — |
| Anthony J. Benjamin | Prohibition | 233 | 0.06% | — |
| Scattering | Write-in | 371 | 0.06% | — |
Incumbent died October 21, 1917. New senator elected April 2, 1918. Republican gain. Source candidate / selection detail: ▌Y Irvine Lenroot (Republican) 38.73%
▌Joseph E. Davies (Democratic) 35.12%
▌Victor L. Berger (Socialist) 26.09%
▌Anthony J. Benjamin (Prohibition) 0.06%
Sources & further reading
Wyoming — Senate — General
Popular election. Popular votes in this state contest
| Candidate | Party | Votes | Share | Result |
|---|---|---|---|---|
| Francis E. Warren | Republican | — | 57.77% | Elected |
| John Eugene Osborne | Democratic | — | 42.23% | — |
Incumbent re-elected. Source candidate / selection detail: ▌Y Francis E. Warren (Republican) 57.77%
▌John Eugene Osborne (Democratic) 42.23%
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 H. Bankhead · Alabama | — | — | 1 | — |
| Joseph T. Robinson · Arkansas | — | — | 1 | — |
| Lawrence C. Phipps · Colorado | — | — | 1 | — |
| L. Heisler Ball · Delaware | — | — | 1 | — |
| William J. Harris · Georgia | — | — | 1 | — |
| William Borah · Idaho | — | — | 1 | — |
| Medill McCormick · Illinois | — | — | 1 | — |
| William S. Kenyon · Iowa | — | — | 1 | — |
| Arthur Capper · Kansas | — | — | 1 | — |
| Augustus O. Stanley · Kentucky | — | — | 1 | — |
| Joseph E. Ransdell · Louisiana | — | — | 1 | — |
| Bert M. Fernald · Maine | — | — | 1 | — |
| David I. Walsh · Massachusetts | — | — | 1 | — |
| Truman H. Newberry · Michigan | — | — | 1 | — |
| Knute Nelson · Minnesota | — | — | 1 | — |
| Pat Harrison · Mississippi | — | — | 1 | — |
| Thomas J. Walsh · Montana | — | — | 1 | — |
| George W. Norris · Nebraska | — | — | 1 | — |
| Henry W. Keyes · New Hampshire | — | — | 1 | — |
| Walter E. Edge · New Jersey | — | — | 1 | — |
| Albert B. Fall · New Mexico | — | — | 1 | — |
| F. M. Simmons · North Carolina | — | — | 1 | — |
| Robert L. Owen · Oklahoma | — | — | 1 | — |
| Charles L. McNary · Oregon | — | — | 1 | — |
| LeBaron B. Colt · Rhode Island | — | — | 1 | — |
| Nathaniel B. Dial · South Carolina | — | — | 1 | — |
| Thomas Sterling · South Dakota | — | — | 1 | — |
| John K. Shields · Tennessee | — | — | 1 | — |
| Morris Sheppard · Texas | — | — | 1 | — |
| Thomas S. Martin · Virginia | — | — | 1 | — |
| Davis Elkins · West Virginia | — | — | 1 | — |
| Francis E. Warren · 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