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United States · Election results history · 2022 Senate · Iowa
Election 2022 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.

2022 US Senate election in Iowa

Chuck Grassley (Republican) beat Michael Franken (Democrat) in Iowa in 2022, 56.1% to 43.9%, a margin of 12.2 points and 148,171 votes.

The Republican hold continued from 2016, when Chuck Grassley also won.

Republicans led in 94 of the 99 counties and Democrats in 5. The largest, Polk, cast 190,757 votes and went to the Democrat by 12.7 points. The closest was Jefferson, where 49 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
Chuck Grassley won Republican 681,501 56.1%
Michael Franken Democratic 533,330 43.9%
Total1,214,831

Every county

CountyDemocratRepublicanOthersTotalMargin
Polk 107,478 56.3% 83,279 43.7% 190,757 D+12.7
Linn 51,008 54.5% 42,551 45.5% 93,559 D+9.0
Johnson 45,416 71.3% 18,245 28.7% 63,661 D+42.7
Scott 30,655 48.2% 32,955 51.8% 63,610 R+3.6
Black Hawk 24,036 51.0% 23,133 49.0% 47,169 D+1.9
Dallas 20,757 47.1% 23,286 52.9% 44,043 R+5.7
Dubuque 18,020 46.5% 20,762 53.5% 38,782 R+7.1
Story 21,022 57.0% 15,870 43.0% 36,892 D+14.0
Pottawattamie 11,173 38.6% 17,785 61.4% 28,958 R+22.8
Woodbury 10,409 36.4% 18,161 63.6% 28,570 R+27.1
Warren 9,634 40.7% 14,052 59.3% 23,686 R+18.7
Cerro Gordo 7,644 45.2% 9,260 54.8% 16,904 R+9.6
Clinton 7,213 42.9% 9,595 57.1% 16,808 R+14.2
Jasper 5,658 37.8% 9,298 62.2% 14,956 R+24.3
Marion 4,341 30.7% 9,799 69.3% 14,140 R+38.6
Sioux 1,694 12.0% 12,398 88.0% 14,092 R+76.0
Des Moines 5,836 44.2% 7,353 55.8% 13,189 R+11.5
Muscatine 5,550 42.1% 7,623 57.9% 13,173 R+15.7
Marshall 5,060 40.9% 7,307 59.1% 12,367 R+18.2
Webster 4,244 35.5% 7,704 64.5% 11,948 R+29.0
Lee 4,476 39.1% 6,964 60.9% 11,440 R+21.7
Benton 3,823 33.8% 7,502 66.2% 11,325 R+32.5
Boone 4,618 41.7% 6,456 58.3% 11,074 R+16.6
Bremer 4,345 39.6% 6,641 60.4% 10,986 R+20.9
Wapello 3,837 36.8% 6,601 63.2% 10,438 R+26.5
Plymouth 2,053 21.2% 7,650 78.8% 9,703 R+57.7
Winneshiek 4,477 46.8% 5,094 53.2% 9,571 R+6.4
Washington 3,235 37.2% 5,450 62.8% 8,685 R+25.5
Dickinson 2,459 29.7% 5,821 70.3% 8,280 R+40.6
Jones 3,041 37.3% 5,118 62.7% 8,159 R+25.5
Buchanan 3,071 37.7% 5,085 62.3% 8,156 R+24.7
Carroll 2,327 28.7% 5,773 71.3% 8,100 R+42.5
Mahaska 1,936 24.2% 6,049 75.8% 7,985 R+51.5
Cedar 3,106 39.3% 4,806 60.7% 7,912 R+21.5
Delaware 2,210 29.0% 5,423 71.0% 7,633 R+42.1
Jackson 2,816 36.9% 4,816 63.1% 7,632 R+26.2
Fayette 2,744 36.5% 4,784 63.5% 7,528 R+27.1
Poweshiek 3,174 42.3% 4,325 57.7% 7,499 R+15.3
Madison 2,405 32.2% 5,064 67.8% 7,469 R+35.6
Clayton 2,512 34.2% 4,839 65.8% 7,351 R+31.7
Iowa 2,539 34.6% 4,803 65.4% 7,342 R+30.8
Henry 2,261 32.9% 4,602 67.1% 6,863 R+34.1
Kossuth 1,925 28.7% 4,781 71.3% 6,706 R+42.6
Tama 2,373 35.9% 4,241 64.1% 6,614 R+28.2
Hardin 2,044 31.0% 4,539 69.0% 6,583 R+37.9
Jefferson 3,214 49.6% 3,263 50.4% 6,477 R+0.8
Clay 1,795 28.2% 4,578 71.8% 6,373 R+43.7
Butler 1,669 27.8% 4,334 72.2% 6,003 R+44.4
Allamakee 1,934 33.7% 3,806 66.3% 5,740 R+32.6
Floyd 2,247 39.3% 3,465 60.7% 5,712 R+21.3
Hamilton 1,945 34.1% 3,757 65.9% 5,702 R+31.8
Mills 1,654 29.6% 3,937 70.4% 5,591 R+40.8
Harrison 1,548 28.5% 3,889 71.5% 5,437 R+43.1
Grundy 1,462 27.2% 3,909 72.8% 5,371 R+45.6
O'Brien 972 18.2% 4,361 81.8% 5,333 R+63.5
Cass 1,502 28.9% 3,698 71.1% 5,200 R+42.2
Page 1,385 27.2% 3,707 72.8% 5,092 R+45.6
Buena Vista 1,518 30.1% 3,530 69.9% 5,048 R+39.9
Guthrie 1,549 31.0% 3,448 69.0% 4,997 R+38.0
Chickasaw 1,665 33.7% 3,276 66.3% 4,941 R+32.6
Lyon 662 13.4% 4,277 86.6% 4,939 R+73.2
Appanoose 1,349 28.7% 3,357 71.3% 4,706 R+42.7
Shelby 1,213 26.3% 3,401 73.7% 4,614 R+47.4
Union 1,464 32.5% 3,035 67.5% 4,499 R+34.9
Cherokee 1,159 25.8% 3,338 74.2% 4,497 R+48.5
Crawford 1,101 25.1% 3,289 74.9% 4,390 R+49.8
Winnebago 1,478 33.9% 2,881 66.1% 4,359 R+32.2
Hancock 1,194 27.5% 3,148 72.5% 4,342 R+45.0
Wright 1,268 29.8% 2,982 70.2% 4,250 R+40.3
Mitchell 1,479 34.9% 2,761 65.1% 4,240 R+30.2
Sac 914 23.4% 2,999 76.6% 3,913 R+53.3
Calhoun 1,027 26.5% 2,853 73.5% 3,880 R+47.1
Humboldt 931 24.3% 2,896 75.7% 3,827 R+51.3
Keokuk 949 25.2% 2,811 74.8% 3,760 R+49.5
Franklin 1,025 28.6% 2,558 71.4% 3,583 R+42.8
Palo Alto 994 27.8% 2,586 72.2% 3,580 R+44.5
Greene 1,218 34.2% 2,340 65.8% 3,558 R+31.5
Montgomery 1,004 28.6% 2,509 71.4% 3,513 R+42.8
Louisa 1,038 29.8% 2,441 70.2% 3,479 R+40.3
Lucas 937 27.2% 2,513 72.8% 3,450 R+45.7
Howard 1,221 36.5% 2,126 63.5% 3,347 R+27.0
Clarke 1,005 30.1% 2,332 69.9% 3,337 R+39.8
Emmet 935 28.1% 2,391 71.9% 3,326 R+43.8
Monona 879 27.0% 2,376 73.0% 3,255 R+46.0
Worth 1,183 36.8% 2,031 63.2% 3,214 R+26.4
Adair 887 28.0% 2,279 72.0% 3,166 R+44.0
Davis 764 25.7% 2,206 74.3% 2,970 R+48.6
Monroe 762 26.3% 2,135 73.7% 2,897 R+47.4
Pocahontas 658 23.4% 2,158 76.6% 2,816 R+53.3
Van Buren 671 24.2% 2,097 75.8% 2,768 R+51.5
Decatur 794 29.0% 1,944 71.0% 2,738 R+42.0
Ida 588 21.6% 2,130 78.4% 2,718 R+56.7
Fremont 735 28.3% 1,861 71.7% 2,596 R+43.4
Audubon 760 31.4% 1,661 68.6% 2,421 R+37.2
Wayne 514 21.7% 1,860 78.3% 2,374 R+56.7
Osceola 346 15.2% 1,923 84.8% 2,269 R+69.5
Taylor 487 21.6% 1,764 78.4% 2,251 R+56.7
Ringgold 556 27.3% 1,484 72.7% 2,040 R+45.5
Adams 467 28.6% 1,167 71.4% 1,634 R+42.8

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