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United States · Election results history · 1972 Senate · Iowa
Election 1972 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.

1972 US Senate election in Iowa

Dick Clark (Democrat) beat Jack Miller (Republican) in Iowa in 1972, 55.1% to 44.1%, a margin of 11.0 points and 132,112 votes.

Iowa changed party: in 1966 it went Republican, for Jack Miller.

Democrats led in 73 of the 99 counties as they stood then and Republicans in 26. The largest, Polk, cast 132,232 votes and went to the Democrat by 17.8 points. The closest was Humboldt, where 3 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
Dick Clark won Democratic 662,637 55.1%
Jack Miller Republican 530,525 44.1%
All other candidates 10,171 0.8%
Total1,203,333

Every county

CountyDemocratRepublicanOthersTotalMargin
Polk 77,209 58.4% 53,652 40.6% 1,371 132,232 D+17.8
Linn 43,713 64.0% 24,048 35.2% 533 68,294 D+28.8
Scott 30,912 53.6% 25,919 44.9% 859 57,690 D+8.7
Black Hawk 29,109 55.0% 23,447 44.3% 395 52,951 D+10.7
Woodbury 22,821 56.2% 17,199 42.3% 598 40,618 D+13.8
Johnson 25,067 70.1% 10,484 29.3% 188 35,739 D+40.8
Dubuque 23,211 66.3% 11,517 32.9% 300 35,028 D+33.4
Story 18,461 59.9% 12,146 39.4% 190 30,797 D+20.5
Pottawattamie 12,338 44.5% 15,066 54.3% 323 27,727 R+9.8
Clinton 12,773 56.7% 9,602 42.6% 139 22,514 D+14.1
Cerro Gordo 12,113 56.3% 9,227 42.9% 191 21,531 D+13.4
Webster 11,309 57.1% 8,302 41.9% 180 19,791 D+15.2
Des Moines 11,519 60.8% 7,272 38.4% 146 18,937 D+22.4
Wapello 10,794 60.8% 6,692 37.7% 275 17,761 D+23.1
Marshall 9,628 54.9% 7,772 44.3% 140 17,540 D+10.6
Lee 10,083 58.4% 7,072 41.0% 109 17,264 D+17.4
Jasper 8,825 54.7% 7,150 44.3% 147 16,122 D+10.4
Sioux 4,462 33.0% 9,043 66.9% 18 13,523 R+33.9
Muscatine 6,812 51.0% 6,383 47.8% 163 13,358 D+3.2
Warren 7,220 57.2% 5,260 41.7% 139 12,619 D+15.5
Fayette 6,600 55.7% 5,205 43.9% 51 11,856 D+11.8
Boone 6,647 58.2% 4,670 40.9% 108 11,425 D+17.3
Dallas 6,514 57.2% 4,774 42.0% 91 11,379 D+15.3
Marion 5,933 53.6% 4,982 45.0% 155 11,070 D+8.6
Plymouth 5,597 54.4% 4,667 45.3% 32 10,296 D+9.0
Winneshiek 5,434 53.0% 4,767 46.5% 52 10,253 D+6.5
Kossuth 5,217 51.9% 4,775 47.5% 59 10,051 D+4.4
Mahaska 4,839 50.2% 4,685 48.6% 123 9,647 D+1.6
Benton 5,764 60.4% 3,681 38.6% 98 9,543 D+21.8
Bremer 4,544 48.6% 4,763 50.9% 49 9,356 R+2.3
Buena Vista 4,982 54.2% 4,169 45.3% 42 9,193 D+8.8
Hardin 4,568 50.0% 4,500 49.3% 63 9,131 D+0.7
Carroll 5,695 62.9% 3,249 35.9% 110 9,054 D+27.0
Buchanan 5,340 59.1% 3,680 40.7% 22 9,042 D+18.4
Tama 4,988 57.1% 3,700 42.4% 47 8,735 D+14.7
Clayton 4,612 52.8% 4,032 46.2% 84 8,728 D+6.6
Poweshiek 4,736 55.6% 3,729 43.8% 52 8,517 D+11.8
Jackson 5,089 59.9% 3,265 38.4% 145 8,499 D+21.5
Jones 4,950 58.7% 3,453 41.0% 29 8,432 D+17.8
Floyd 4,247 52.3% 3,815 47.0% 52 8,114 D+5.3
Page 2,501 31.4% 5,422 68.0% 47 7,970 R+36.6
Washington 4,013 50.4% 3,910 49.1% 42 7,965 D+1.3
Hamilton 4,039 51.9% 3,665 47.1% 83 7,787 D+4.8
Delaware 4,280 55.2% 3,452 44.5% 20 7,752 D+10.7
Henry 3,930 50.9% 3,762 48.7% 35 7,727 D+2.2
Crawford 4,331 57.6% 3,107 41.3% 76 7,514 D+16.3
Cherokee 4,186 55.7% 3,304 44.0% 22 7,512 D+11.7
Clay 3,957 53.2% 3,320 44.6% 164 7,441 D+8.6
O'Brien 3,151 42.9% 4,151 56.5% 40 7,342 R+13.6
Cass 2,823 39.7% 4,241 59.6% 46 7,110 R+19.9
Wright 3,733 52.9% 3,281 46.5% 38 7,052 D+6.4
Harrison 3,448 49.4% 3,521 50.5% 10 6,979 R+1.0
Jefferson 3,576 51.4% 3,351 48.1% 33 6,960 D+3.2
Cedar 3,578 51.5% 3,322 47.9% 42 6,942 D+3.7
Chickasaw 3,905 56.6% 2,978 43.2% 13 6,896 D+13.4
Appanoose 3,344 49.1% 3,437 50.5% 23 6,804 R+1.4
Iowa 3,516 51.8% 3,166 46.6% 109 6,791 D+5.2
Sac 3,541 54.6% 2,933 45.2% 11 6,485 D+9.4
Keokuk 3,486 54.0% 2,924 45.3% 42 6,452 D+8.7
Winnebago 3,064 47.6% 3,363 52.2% 13 6,440 R+4.6
Grundy 2,779 43.5% 3,587 56.1% 25 6,391 R+12.6
Allamakee 2,872 45.4% 3,398 53.7% 59 6,329 R+8.3
Shelby 2,895 45.8% 3,356 53.1% 69 6,320 R+7.3
Butler 2,466 39.2% 3,786 60.2% 40 6,292 R+21.0
Calhoun 3,490 55.8% 2,710 43.3% 57 6,257 D+12.5
Dickinson 2,965 48.8% 2,887 47.5% 230 6,082 D+1.3
Montgomery 2,187 36.7% 3,747 62.8% 30 5,964 R+26.2
Hancock 2,999 50.6% 2,898 48.9% 26 5,923 D+1.7
Guthrie 3,110 52.8% 2,762 46.9% 21 5,893 D+5.9
Palo Alto 3,332 56.7% 2,506 42.6% 38 5,876 D+14.1
Union 2,932 50.0% 2,866 48.9% 64 5,862 D+1.1
Madison 2,955 50.7% 2,809 48.2% 63 5,827 D+2.5
Mitchell 2,952 51.0% 2,830 48.9% 10 5,792 D+2.1
Humboldt 2,853 49.7% 2,850 49.7% 35 5,738 D+0.1
Franklin 2,732 48.7% 2,778 49.5% 101 5,611 R+0.8
Greene 3,018 54.0% 2,463 44.0% 112 5,593 D+9.9
Monona 3,084 56.9% 2,324 42.8% 16 5,424 D+14.0
Howard 2,846 52.8% 2,525 46.9% 16 5,387 D+6.0
Pocahontas 3,073 57.1% 2,274 42.2% 36 5,383 D+14.8
Emmet 2,463 46.5% 2,805 53.0% 27 5,295 R+6.5
Lyon 1,649 32.1% 3,464 67.5% 22 5,135 R+35.3
Adair 2,287 48.7% 2,375 50.6% 31 4,693 R+1.9
Lucas 2,343 50.3% 2,295 49.3% 21 4,659 D+1.0
Mills 1,775 38.4% 2,803 60.7% 42 4,620 R+22.3
Worth 2,596 57.8% 1,894 42.1% 4 4,494 D+15.6
Louisa 2,342 52.1% 2,136 47.5% 15 4,493 D+4.6
Decatur 2,491 56.0% 1,947 43.7% 13 4,451 D+12.2
Ida 2,276 53.0% 2,016 46.9% 5 4,297 D+6.1
Wayne 1,968 46.4% 2,255 53.2% 18 4,241 R+6.8
Taylor 1,753 42.3% 2,382 57.5% 8 4,143 R+15.2
Davis 2,345 57.0% 1,750 42.6% 17 4,112 D+14.5
Monroe 2,306 56.5% 1,769 43.3% 10 4,085 D+13.1
Audubon 1,945 48.6% 2,036 50.9% 17 3,998 R+2.3
Clarke 2,073 53.7% 1,770 45.8% 20 3,863 D+7.8
Fremont 1,706 44.4% 2,122 55.2% 17 3,845 R+10.8
Osceola 1,558 45.2% 1,876 54.4% 15 3,449 R+9.2
Ringgold 1,400 43.8% 1,783 55.8% 10 3,193 R+12.0
Adams 1,624 52.8% 1,431 46.5% 22 3,077 D+6.3
Van Buren 1,120 37.7% 1,836 61.9% 12 2,968 R+24.1

Counties as they stood in 1972; 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.

Iowa Senate elections we hold

YearWinnerMargin
2022 Chuck Grassley (R) R+12.2
2020 Joni Ernst (R) R+6.6
2016 Chuck Grassley (R) R+24.4
2014 Joni Ernst (R) R+8.3
2010 Chuck Grassley (R) R+31.0
2008 Tom Harkin (D) D+25.4
2004 Charles E. Grassley (R) R+42.3
2002 Tom Harkin (D) D+10.4
1998 Charles E. Grassley (R) R+37.9
1996 Tom Harkin (D) D+5.1
1992 Chuck Grassley (R) R+42.4
1990 Tom Harkin (D) D+9.1
1986 Charles E. Grassley (R) R+32.5
1984 Tom Harkin (D) D+11.8
1980 Charles E. Grassley (R) R+7.9
1978 Roger W. Jepsen (R) R+3.2
1974 John C. Culver (D) D+4.8
1972 Dick Clark (D) D+11.0
1968 Harold E. Hughes (D) D+0.6
1966 Jack Miller (R) R+23.1
1962 Bourke Hickenlooper (R) R+6.8
1960 Jack Miller (R) R+3.8
1956 Bourke Hickenlooper (R) R+7.8
1954 Thomas E. Martin (R) R+4.7
1950 Bourke Hickenlooper (R) R+10.1
1948 Guy M. Gillette (D) D+16.2
1944 Bourke Hickenlooper (R) R+2.9
1942 George A. Wilson (R) R+16.3
1938 Guy M. Gillette (D) D+0.3
1936 Clyde L. Herring (D) D+3.4
1932 Richard L. Murphy (D) D+13.9
1930 Lester Dickinson (R) R+13.3
1926 Smith W. Brookhart (R) R+13.2
1924 Smith W. Brookhart (R) R+0.1
1920 Albert B. Cummins (R) R+24.0
1918 William S. Kenyon (R) R+30.8
1914 Albert B. Cummins (R) R+9.0