Election 1984 Results
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1984 Senate election results by state and county
Reagan won 49 states, but Democrats took 17 of the Senate seats up and made a small net gain, while Republicans kept control of the chamber.
33 Senate races were held in 1984. Democrats won 16 and Republicans 17.
The closest were Kentucky (R+0.4), Illinois (D+1.9) and North Carolina (R+3.9). 4 seats changed party: Illinois to the Democrats, Iowa to the Democrats, Kentucky to the Republicans and Tennessee to the Democrats.
Early projection, based on early and incomplete polling: the likely matchups, each weighted by the betting markets' odds of both nominations, not a result. Each county is its 2024 presidential margin moved by its state's projected swing; set a national vote and every state, district and county moves by the same amount from our projection. Colours run in 100 steps from a safe Republican to a safe Democratic margin. Boundaries: US Census Bureau.
About the 1984 Senate elections
Reagan beat Walter Mondale with 525 electoral votes, but his landslide did not reach far down the ballot. Democrats won 17 Senate races and Republicans 16, and Democrats made a net gain of two seats. Republicans kept their majority. Democrats gained three seats. Paul Simon beat Charles Percy in Illinois by 1.9 points, Tom Harkin unseated Roger Jepsen in Iowa, and Al Gore won the open Tennessee seat left by Howard Baker. Republicans took Kentucky, where Mitch McConnell beat Walter Huddleston by a fraction of a point, beginning a Senate career that would make him the longest-serving party leader in the chamber's history. In North Carolina, Jesse Helms beat Governor Jim Hunt by 3.9 points in what was then the most expensive Senate race ever run. Jay Rockefeller won West Virginia, and John Kerry won an open seat in Massachusetts. In Nebraska, James Exon held his seat by 3.9 points.
Every race
| State | Democrat | Votes | Republican | Votes | Others | Margin |
|---|---|---|---|---|---|---|
| Alabama | Howell Heflin | 860,535 (62.8%) | Albert Lee Smith | 498,508 (36.4%) | 12,191 | D+26.4 |
| Alaska | John E. Havelock | 58,804 (28.5%) | Ted Stevens | 146,919 (71.2%) | 715 | R+42.7 |
| Arkansas | David Pryor | 502,341 (57.3%) | Ed Bethune | 373,615 (42.7%) | D+14.7 | |
| Colorado | Nancy Dick | 449,327 (34.6%) | William L. Armstrong | 833,821 (64.2%) | 14,661 | R+29.6 |
| Delaware | Joseph R. Biden Jr. | 147,831 (60.1%) | John M. Burris | 98,101 (39.9%) | D+20.2 | |
| Georgia | Sam Nunn | 1,344,104 (79.9%) | Mike Hicks | 337,196 (20.1%) | 44 | D+59.9 |
| Idaho | Peter M. Busch | 105,591 (26.0%) | James A. McClure | 293,193 (72.2%) | 7,384 | R+46.2 |
| Illinois flip | Paul Simon | 2,397,165 (50.1%) | Charles H. Percy | 2,308,039 (48.2%) | 82,131 | D+1.9 |
| Iowa flip | Tom Harkin | 716,883 (55.5%) | Roger W. Jepsen | 564,381 (43.7%) | 11,436 | D+11.8 |
| Kansas | James R. Maher | 211,664 (21.2%) | Nancy Landon Kassebaum | 757,402 (76.0%) | 27,663 | R+54.8 |
| Kentucky flip | Walter Dee Huddleston | 639,721 (49.5%) | Mitch McConnell | 644,990 (49.9%) | 7,696 | R+0.4 |
| Louisiana | J. Bennett Johnston | 838,181 (85.7%) | Robert M. Ross | 86,546 (8.9%) | Larry Napoleon "Boogaloo" Cooper (Republican) 52,746 (5.4%) |
D+76.9 |
| Louisiana: Decided in the open primary, where the winner took a majority. | ||||||
| Maine | Elizabeth H. Mitchell | 142,626 (25.9%) | William S. Cohen | 404,414 (73.3%) | 4,366 | R+47.5 |
| Massachusetts | John F. Kerry | 1,393,150 (55.1%) | Raymond Shamie | 1,136,913 (44.9%) | 408 | D+10.1 |
| Michigan | Carl Levin | 1,915,831 (51.8%) | Jack Lousma | 1,745,302 (47.2%) | 39,805 | D+4.6 |
| Minnesota | Joan Anderson Growe | 852,844 (41.3%) | Rudy Boschwitz | 1,199,926 (58.1%) | 13,373 | R+16.8 |
| Mississippi | William F. Winter | 371,926 (39.1%) | Thad Cochran | 580,314 (60.9%) | R+21.9 | |
| Montana | Max Baucus | 215,704 (56.9%) | Chuck Cozzens | 154,308 (40.7%) | 9,143 | D+16.2 |
| Nebraska | J. J. Exon | 332,217 (51.9%) | Nancy Hoch | 307,147 (48.0%) | 304 | D+3.9 |
| New Hampshire | Norman E. D'amours | 157,447 (41.0%) | Gordon J. Humphrey | 225,828 (58.8%) | 1,094 | R+17.8 |
| New Jersey | Bill Bradley | 1,986,644 (64.2%) | Mary V. Mochary | 1,080,100 (34.9%) | 29,712 | D+29.3 |
| New Mexico | Judith A. Pratt | 141,253 (28.1%) | Pete V. Domenici | 361,371 (71.9%) | 10 | R+43.8 |
| North Carolina | Jim Hunt | 1,070,488 (47.8%) | Jesse Helms | 1,156,768 (51.7%) | 11,795 | R+3.9 |
| Oklahoma | David Boren | 906,131 (75.6%) | Will E. Bill Crozier | 280,638 (23.4%) | 11,168 | D+52.2 |
| Oregon | Margie Hendriksen | 406,122 (33.4%) | Mark O. Hatfield | 808,152 (66.5%) | 461 | R+33.1 |
| Rhode Island | Claiborne Deb. Pell | 285,811 (72.7%) | Barbara M. Leonard | 107,545 (27.3%) | D+45.3 | |
| South Carolina | Melvin Purvis | 306,982 (31.8%) | Strom Thurmond | 644,815 (66.8%) | 13,333 | R+35.0 |
| South Dakota | George V. Cunningham | 80,537 (25.5%) | Larry Pressler | 235,176 (74.5%) | R+49.0 | |
| Tennessee flip | Al Gore | 1,000,607 (60.7%) | Victor Ashe | 557,016 (33.8%) | Ed McAteer (Independent) 87,234 (5.3%) |
D+26.9 |
| Texas | Lloyd Doggett | 2,202,557 (41.4%) | Phil Gramm | 3,111,348 (58.5%) | 273 | R+17.1 |
| Virginia | Edythe C. Harrison | 601,142 (29.9%) | John Warner | 1,406,194 (70.0%) | 151 | R+40.1 |
| West Virginia | Jay Rockefeller | 374,233 (51.8%) | John R. Raese | 344,680 (47.7%) | 3,299 | D+4.1 |
| Wyoming | Victor A. Ryan | 40,525 (21.7%) | Al Simpson | 146,373 (78.3%) | R+56.6 | |
Margin: the Democrat's share of all votes minus the Republican's. Margins are Democrat minus Republican, of all votes. Certified results, from the states' own archives, the MIT Election Data and Science Lab, Heideman (2026) and Algara & Amlani (2021). By county: "As they were" draws each county as it stood on election day; "Today's" shares the old votes among today's counties by area. County boundaries: Newberry Library, Atlas of Historical County Boundaries (CC BY-NC-SA 2.5). How these results were checked.