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United States · Election results history · 1978 Senate · Colorado
Election 1978 Results

Each election opens in its own mode: the forecast before the votes are counted, the live count while races are still too close to call, and the results once every race is decided.

1978 US Senate election in Colorado

William L. Armstrong (Republican) beat Floyd K. Haskell (Democrat) in Colorado in 1978, 58.7% to 40.3%, a margin of 18.4 points and 150,653 votes.

Colorado changed party: in 1972 it went Democratic, for Floyd K. Haskell.

Republicans led in 53 of the 63 counties as they stood then and Democrats in 10. The largest, Denver, cast 154,868 votes and went to the Democrat by 2.7 points. The closest was Conejos, where 35 votes separated the two parties.

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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.

Senate

CandidatePartyVotesShare
William L. Armstrong won Republican 480,801 58.7%
Floyd K. Haskell Democratic 330,148 40.3%
All other candidates 8,307 1.0%
Total819,256

Every county

CountyDemocratRepublicanOthersTotalMargin
Denver 78,231 50.5% 74,062 47.8% 2,575 154,868 D+2.7
Jefferson 36,642 33.5% 71,825 65.7% 801 109,268 R+32.2
Arapahoe 22,736 28.8% 55,350 70.2% 816 78,902 R+41.3
El Paso 20,088 30.8% 44,641 68.4% 515 65,244 R+37.6
Boulder 28,530 45.7% 33,417 53.5% 471 62,418 R+7.8
Adams 25,269 45.9% 29,295 53.2% 536 55,100 R+7.3
Larimer 14,989 38.2% 24,004 61.2% 255 39,248 R+23.0
Pueblo 19,948 52.8% 17,593 46.6% 238 37,779 D+6.2
Weld 11,383 39.9% 16,980 59.5% 183 28,546 R+19.6
Mesa 7,712 33.8% 14,941 65.4% 184 22,837 R+31.7
Fremont 3,425 38.8% 5,335 60.5% 62 8,822 R+21.7
La Plata 2,810 36.6% 4,802 62.6% 61 7,673 R+26.0
Douglas 1,735 24.1% 5,418 75.2% 52 7,205 R+51.1
Delta 2,442 36.2% 4,235 62.8% 68 6,745 R+26.6
Logan 2,091 31.3% 4,540 68.0% 47 6,678 R+36.7
Montrose 2,439 36.7% 4,180 62.8% 34 6,653 R+26.2
Otero 2,629 39.7% 3,863 58.3% 133 6,625 R+18.6
Las Animas 3,926 60.7% 2,494 38.6% 45 6,465 D+22.2
Morgan 2,216 34.7% 4,081 64.0% 84 6,381 R+29.2
Garfield 2,422 40.8% 3,453 58.1% 68 5,943 R+17.3
Routt 1,969 44.8% 2,394 54.4% 34 4,397 R+9.7
Alamosa 1,780 43.0% 2,331 56.3% 32 4,143 R+13.3
Montezuma 1,484 37.4% 2,416 60.9% 69 3,969 R+23.5
Chaffee 1,747 45.1% 2,079 53.7% 49 3,875 R+8.6
Yuma 1,227 32.2% 2,564 67.3% 21 3,812 R+35.1
Prowers 1,605 42.5% 2,080 55.1% 89 3,774 R+12.6
Rio Grande 1,224 32.4% 2,499 66.3% 49 3,772 R+33.8
Pitkin 1,932 52.2% 1,752 47.3% 20 3,704 D+4.9
Gunnison 1,415 39.7% 2,118 59.4% 34 3,567 R+19.7
Eagle 1,436 40.7% 2,057 58.3% 34 3,527 R+17.6
Conejos 1,584 49.8% 1,549 48.7% 50 3,183 D+1.1
Kit Carson 979 31.9% 2,072 67.5% 20 3,071 R+35.6
Moffat 1,012 34.1% 1,854 62.5% 102 2,968 R+28.4
Huerfano 1,540 56.2% 1,188 43.3% 14 2,742 D+12.8
Summit 1,043 38.3% 1,665 61.1% 17 2,725 R+22.8
Grand 809 32.1% 1,704 67.5% 11 2,524 R+35.5
Baca 1,004 40.4% 1,463 58.8% 19 2,486 R+18.5
Washington 718 29.2% 1,721 70.0% 21 2,460 R+40.8
Teller 829 35.3% 1,497 63.8% 22 2,348 R+28.4
Lake 1,180 50.8% 1,104 47.6% 37 2,321 D+3.3
Lincoln 665 31.4% 1,442 68.1% 9 2,116 R+36.7
Rio Blanco 729 34.5% 1,363 64.4% 23 2,115 R+30.0
Clear Creek 860 40.8% 1,218 57.8% 30 2,108 R+17.0
Phillips 708 35.1% 1,296 64.3% 13 2,017 R+29.2
Elbert 613 30.9% 1,351 68.1% 19 1,983 R+37.2
Bent 865 43.6% 1,101 55.5% 16 1,982 R+11.9
Saguache 846 43.5% 1,033 53.1% 65 1,944 R+9.6
Park 633 38.3% 986 59.7% 32 1,651 R+21.4
Sedgwick 540 34.2% 1,027 65.1% 10 1,577 R+30.9
Costilla 967 70.0% 406 29.4% 9 1,382 D+40.6
Archuleta 584 42.4% 781 56.8% 11 1,376 R+14.3
San Miguel 718 56.1% 556 43.4% 6 1,280 D+12.7
Crowley 444 35.4% 803 63.9% 9 1,256 R+28.6
Cheyenne 446 37.7% 732 61.8% 6 1,184 R+24.2
Kiowa 463 41.5% 649 58.1% 5 1,117 R+16.7
Custer 301 31.0% 657 67.6% 14 972 R+36.6
Ouray 280 31.4% 605 67.8% 7 892 R+36.4
Gilpin 438 53.0% 370 44.8% 18 826 D+8.2
Jackson 277 35.2% 506 64.3% 4 787 R+29.1
Dolores 248 38.4% 382 59.2% 15 645 R+20.8
San Juan 202 43.8% 252 54.7% 7 461 R+10.8
Mineral 150 37.3% 249 61.9% 3 402 R+24.6
Hinsdale 90 29.1% 215 69.6% 4 309 R+40.5

Counties as they stood in 1978; some have since been split, merged or renamed. Margin: the Democrat's share of all votes minus the Republican's. Sources and how the results were checked.

Colorado Senate elections we hold

YearWinnerMargin
2022 Michael Bennet (D) D+14.6
2020 John W Hickenlooper (D) D+9.3
2016 Michael F. Bennet (D) D+5.7
2014 Cory Gardner (R) R+1.9
2010 Michael F. Bennet (D) D+1.6
2008 Mark Udall (D) D+10.3
2004 Ken Salazar (D) D+4.8
2002 Wayne Allard (R) R+4.9
1998 Ben Nighthorse Campbell (R) R+27.5
1996 Wayne Allard (R) R+5.7
1992 Ben Nighthorse Campbell (D) D+9.1
1990 Hank Brown (R) R+14.0
1986 Timothy E. Wirth (D) D+1.6
1984 William L. Armstrong (R) R+29.6
1980 Gary Hart (D) D+1.6
1978 William L. Armstrong (R) R+18.4
1974 Gary Hart (D) D+17.7
1972 Floyd K. Haskell (D) D+1.0
1968 Peter H. Dominick (R) R+17.1
1966 Gordon Allott (R) R+16.1
1962 Peter H. Dominick (R) R+8.0
1960 Gordon Allott (R) R+7.5
1956 John A. Carroll (D) D+0.4
1954 Gordon Allott (R) R+2.6
1950 Eugene D. Millikin (R) R+6.5
1948 Edwin C. Johnson (D) D+34.4
1944 Eugene Millikin (R) R+12.7
1942 Edwin C. Johnson (D) D+1.0
1938 Alva B. Adams (D) D+18.1
1936 Edwin C. Johnson (D) D+28.2
1932 Alva B. Adams (D) D+6.4
1930 Edward P. Costigan (D) D+13.2
1926 Charles W. Waterman (R) R+3.9
1924 Lawrence C. Phipps (R) R+6.3
1920 Samuel D. Nicholson (R) R+15.2
1918 Lawrence C. Phipps (R) R+1.6
1914 Charles S. Thomas (D) D+1.3