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United States · Election results history · 1918 Senate · Iowa
Election 1918 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.

1918 US Senate election in Iowa

William S. Kenyon (Republican) beat Charles R. Keyes (Democrat) in Iowa in 1918, 65.4% to 34.6%, a margin of 30.8 points and 108,434 votes.

Republicans led in 96 of the 99 counties as they stood then and Democrats in 3. The largest, Polk, cast 9,848 votes and went to the Republican by 44.2 points. The closest was Davis, where 100 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 S. Kenyon won Republican 230,264 65.4%
Charles R. Keyes Democratic 121,830 34.6%
Total352,094

Every county

CountyDemocratRepublicanOthersTotalMargin
Polk 2,749 27.9% 7,099 72.1% 9,848 R+44.2
Linn 3,293 34.3% 6,295 65.7% 9,588 R+31.3
Scott 3,117 33.3% 6,233 66.7% 9,350 R+33.3
Woodbury 3,168 36.6% 5,490 63.4% 8,658 R+26.8
Pottawattamie 3,516 41.7% 4,915 58.3% 8,431 R+16.6
Dubuque 3,972 52.8% 3,546 47.2% 7,518 D+5.7
Clinton 2,318 34.1% 4,472 65.9% 6,790 R+31.7
Black Hawk 1,882 28.8% 4,661 71.2% 6,543 R+42.5
Wapello 2,393 37.6% 3,977 62.4% 6,370 R+24.9
Lee 2,548 43.0% 3,375 57.0% 5,923 R+14.0
Des Moines 2,575 48.9% 2,695 51.1% 5,270 R+2.3
Johnson 2,599 53.0% 2,309 47.0% 4,908 D+5.9
Muscatine 1,447 29.6% 3,440 70.4% 4,887 R+40.8
Jasper 1,823 38.5% 2,908 61.5% 4,731 R+22.9
Marshall 1,201 25.4% 3,526 74.6% 4,727 R+49.2
Fayette 1,422 31.8% 3,043 68.2% 4,465 R+36.3
Appanoose 1,592 35.7% 2,864 64.3% 4,456 R+28.5
Tama 1,986 45.8% 2,352 54.2% 4,338 R+8.4
Webster 975 22.7% 3,317 77.3% 4,292 R+54.6
Marion 1,990 46.5% 2,289 53.5% 4,279 R+7.0
Harrison 1,722 41.6% 2,419 58.4% 4,141 R+16.8
Monroe 1,517 38.1% 2,463 61.9% 3,980 R+23.8
Mahaska 1,358 34.9% 2,536 65.1% 3,894 R+30.3
Clayton 1,489 38.8% 2,350 61.2% 3,839 R+22.4
Winneshiek 1,311 34.3% 2,515 65.7% 3,826 R+31.5
Washington 1,364 35.8% 2,446 64.2% 3,810 R+28.4
Keokuk 1,471 39.0% 2,296 61.0% 3,767 R+21.9
Cerro Gordo 994 26.6% 2,741 73.4% 3,735 R+46.8
Benton 1,486 40.6% 2,176 59.4% 3,662 R+18.8
Buchanan 1,145 31.4% 2,497 68.6% 3,642 R+37.1
Kossuth 1,224 34.0% 2,371 66.0% 3,595 R+31.9
Jones 1,412 39.9% 2,125 60.1% 3,537 R+20.2
Story 702 20.0% 2,806 80.0% 3,508 R+60.0
Poweshiek 1,015 29.1% 2,476 70.9% 3,491 R+41.9
Jackson 1,422 40.9% 2,053 59.1% 3,475 R+18.2
Crawford 1,609 46.4% 1,860 53.6% 3,469 R+7.2
Plymouth 1,376 40.1% 2,053 59.9% 3,429 R+19.7
Allamakee 1,234 36.5% 2,145 63.5% 3,379 R+27.0
Page 866 25.8% 2,491 74.2% 3,357 R+48.4
Decatur 1,424 42.7% 1,913 57.3% 3,337 R+14.7
Cedar 1,104 33.3% 2,210 66.7% 3,314 R+33.4
Carroll 1,786 54.3% 1,506 45.7% 3,292 D+8.5
Wayne 1,334 41.2% 1,907 58.8% 3,241 R+17.7
Sioux 1,014 31.6% 2,192 68.4% 3,206 R+36.7
Union 1,156 36.6% 2,002 63.4% 3,158 R+26.8
Henry 1,048 33.3% 2,100 66.7% 3,148 R+33.4
Shelby 1,466 47.3% 1,631 52.7% 3,097 R+5.3
Dallas 875 28.7% 2,179 71.3% 3,054 R+42.7
Boone 827 27.3% 2,200 72.7% 3,027 R+45.4
Guthrie 919 30.5% 2,092 69.5% 3,011 R+39.0
Jefferson 1,028 34.1% 1,983 65.9% 3,011 R+31.7
Warren 958 32.5% 1,993 67.5% 2,951 R+35.1
Van Buren 1,029 34.9% 1,917 65.1% 2,946 R+30.1
Monona 1,095 37.4% 1,832 62.6% 2,927 R+25.2
O'Brien 1,014 35.0% 1,881 65.0% 2,895 R+29.9
Hardin 572 19.8% 2,319 80.2% 2,891 R+60.4
Fremont 1,327 46.5% 1,526 53.5% 2,853 R+7.0
Cass 831 29.2% 2,019 70.8% 2,850 R+41.7
Iowa 1,128 39.9% 1,698 60.1% 2,826 R+20.2
Chickasaw 1,197 42.9% 1,594 57.1% 2,791 R+14.2
Davis 1,345 48.2% 1,445 51.8% 2,790 R+3.6
Bremer 1,215 43.7% 1,568 56.3% 2,783 R+12.7
Montgomery 757 27.4% 2,004 72.6% 2,761 R+45.2
Hamilton 513 18.6% 2,242 81.4% 2,755 R+62.8
Delaware 715 26.3% 2,002 73.7% 2,717 R+47.4
Floyd 563 20.9% 2,128 79.1% 2,691 R+58.2
Wright 490 18.5% 2,154 81.5% 2,644 R+62.9
Pocahontas 908 35.2% 1,668 64.8% 2,576 R+29.5
Buena Vista 634 24.7% 1,936 75.3% 2,570 R+50.7
Grundy 754 29.4% 1,814 70.6% 2,568 R+41.3
Taylor 782 30.9% 1,752 69.1% 2,534 R+38.3
Madison 797 31.6% 1,728 68.4% 2,525 R+36.9
Ringgold 727 29.9% 1,705 70.1% 2,432 R+40.2
Calhoun 634 26.3% 1,777 73.7% 2,411 R+47.4
Butler 512 21.2% 1,898 78.8% 2,410 R+57.5
Sac 660 27.4% 1,745 72.6% 2,405 R+45.1
Lucas 773 32.4% 1,614 67.6% 2,387 R+35.2
Mills 905 38.0% 1,476 62.0% 2,381 R+24.0
Howard 983 42.2% 1,344 57.8% 2,327 R+15.5
Cherokee 689 30.0% 1,609 70.0% 2,298 R+40.0
Hancock 559 25.1% 1,667 74.9% 2,226 R+49.8
Franklin 375 16.9% 1,839 83.1% 2,214 R+66.1
Adair 733 33.8% 1,434 66.2% 2,167 R+32.3
Greene 583 27.0% 1,580 73.0% 2,163 R+46.1
Audubon 832 38.7% 1,318 61.3% 2,150 R+22.6
Clarke 722 34.3% 1,383 65.7% 2,105 R+31.4
Adams 761 36.6% 1,318 63.4% 2,079 R+26.8
Ida 774 38.7% 1,226 61.3% 2,000 R+22.6
Clay 496 25.1% 1,484 74.9% 1,980 R+49.9
Louisa 458 23.7% 1,475 76.3% 1,933 R+52.6
Lyon 674 35.4% 1,231 64.6% 1,905 R+29.2
Mitchell 436 23.8% 1,399 76.2% 1,835 R+52.5
Palo Alto 680 37.2% 1,149 62.8% 1,829 R+25.6
Winnebago 312 17.4% 1,483 82.6% 1,795 R+65.2
Humboldt 377 21.1% 1,406 78.9% 1,783 R+57.7
Worth 278 16.5% 1,410 83.5% 1,688 R+67.1
Emmet 379 23.1% 1,261 76.9% 1,640 R+53.8
Dickinson 431 26.7% 1,183 73.3% 1,614 R+46.6
Osceola 686 42.7% 919 57.3% 1,605 R+14.5

Counties as they stood in 1918; 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