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United States · Election results history · 1938 Senate · Iowa
Election 1938 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.

1938 US Senate election in Iowa

Guy M. Gillette (Democrat) beat Lester Dickinson (Republican) in Iowa in 1938, 49.7% to 49.4%, a margin of 0.3 points and 2,805 votes.

The Democratic hold continued from 1932, when Richard L. Murphy won.

Democrats led in 50 of the 99 counties as they stood then and Republicans in 49. The largest, Polk, cast 55,173 votes and went to the Republican by 4.3 points. The closest was Grundy, where 2 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
Guy M. Gillette won Democratic 413,788 49.7%
Lester Dickinson Republican 410,983 49.4%
All other candidates 7,068 0.8%
Total831,839

Every county

CountyDemocratRepublicanOthersTotalMargin
Polk 26,037 47.2% 28,430 51.5% 706 55,173 R+4.3
Woodbury 18,639 59.3% 12,266 39.0% 524 31,429 D+20.3
Linn 9,734 38.6% 15,237 60.5% 227 25,198 R+21.8
Scott 12,122 51.9% 11,130 47.7% 104 23,356 D+4.2
Black Hawk 9,622 45.4% 11,396 53.8% 168 21,186 R+8.4
Pottawattamie 10,371 50.6% 10,070 49.1% 72 20,513 D+1.5
Dubuque 12,439 68.3% 5,529 30.4% 239 18,207 D+38.0
Clinton 9,178 50.8% 8,775 48.6% 100 18,053 D+2.2
Cerro Gordo 7,239 48.9% 7,482 50.5% 85 14,806 R+1.6
Lee 6,541 48.0% 7,040 51.6% 57 13,638 R+3.7
Wapello 6,810 51.1% 6,442 48.4% 64 13,316 D+2.8
Webster 6,712 57.0% 4,898 41.6% 163 11,773 D+15.4
Des Moines 4,980 44.0% 6,189 54.7% 147 11,316 R+10.7
Fayette 4,892 45.8% 5,726 53.6% 74 10,692 R+7.8
Jasper 5,233 50.1% 5,132 49.1% 88 10,453 D+1.0
Johnson 5,777 57.3% 4,254 42.2% 48 10,079 D+15.1
Marshall 3,974 41.4% 5,554 57.8% 78 9,606 R+16.4
Clayton 4,810 50.8% 4,533 47.8% 132 9,475 D+2.9
Tama 4,689 50.5% 4,523 48.7% 70 9,282 D+1.8
Harrison 4,479 48.3% 4,746 51.2% 52 9,277 R+2.9
Appanoose 4,232 46.7% 4,773 52.7% 51 9,056 R+6.0
Kossuth 5,513 61.2% 3,437 38.2% 54 9,004 D+23.1
Winneshiek 4,487 49.9% 4,408 49.0% 96 8,991 D+0.9
Muscatine 3,616 40.4% 5,278 58.9% 65 8,959 R+18.6
Plymouth 4,720 52.7% 4,120 46.0% 116 8,956 D+6.7
Story 4,210 47.7% 4,545 51.5% 72 8,827 R+3.8
Marion 4,694 53.3% 4,039 45.9% 75 8,808 D+7.4
Dallas 4,064 47.7% 4,405 51.7% 56 8,525 R+4.0
Sioux 4,370 52.3% 3,888 46.5% 101 8,359 D+5.8
Mahaska 3,727 47.3% 4,063 51.5% 94 7,884 R+4.3
Carroll 4,782 61.1% 2,927 37.4% 122 7,831 D+23.7
Page 2,541 32.6% 5,223 67.0% 34 7,798 R+34.4
Boone 4,415 56.7% 3,247 41.7% 123 7,785 D+15.0
Buchanan 3,442 44.8% 4,218 54.8% 31 7,691 R+10.1
Cass 2,899 38.2% 4,668 61.4% 31 7,598 R+23.3
Keokuk 3,455 47.5% 3,777 51.9% 45 7,277 R+4.4
Jackson 3,896 53.6% 3,345 46.0% 23 7,264 D+7.6
Allamakee 3,199 44.9% 3,854 54.1% 71 7,124 R+9.2
Union 2,831 41.0% 4,024 58.3% 43 6,898 R+17.3
Crawford 4,021 58.9% 2,704 39.6% 103 6,828 D+19.3
Hardin 3,448 50.5% 3,279 48.0% 101 6,828 D+2.5
Monona 3,819 56.2% 2,875 42.3% 97 6,791 D+13.9
Benton 3,266 48.3% 3,435 50.8% 62 6,763 R+2.5
Delaware 2,689 39.9% 4,018 59.7% 27 6,734 R+19.7
Floyd 2,730 41.0% 3,865 58.0% 66 6,661 R+17.0
Wright 3,523 53.0% 3,077 46.3% 45 6,645 D+6.7
Henry 2,611 39.3% 3,980 59.9% 50 6,641 R+20.6
Shelby 3,824 57.7% 2,767 41.8% 35 6,626 D+16.0
Chickasaw 3,349 50.8% 3,178 48.2% 62 6,589 D+2.6
O'Brien 3,692 56.5% 2,813 43.0% 34 6,539 D+13.4
Jones 2,843 44.0% 3,597 55.6% 25 6,465 R+11.7
Hamilton 3,620 56.4% 2,771 43.1% 31 6,422 D+13.2
Poweshiek 3,103 48.5% 3,223 50.4% 67 6,393 R+1.9
Cherokee 4,498 71.0% 1,810 28.6% 23 6,331 D+42.5
Cedar 2,808 44.7% 3,414 54.4% 56 6,278 R+9.7
Palo Alto 3,672 59.7% 2,439 39.7% 38 6,149 D+20.1
Fremont 2,979 48.7% 3,129 51.1% 13 6,121 R+2.5
Warren 2,618 42.9% 3,452 56.6% 33 6,103 R+13.7
Iowa 3,030 49.7% 2,886 47.3% 183 6,099 D+2.4
Howard 3,271 53.7% 2,759 45.3% 60 6,090 D+8.4
Bremer 2,935 48.3% 3,083 50.7% 57 6,075 R+2.4
Buena Vista 3,642 60.3% 2,350 38.9% 46 6,038 D+21.4
Montgomery 2,336 39.7% 3,516 59.8% 31 5,883 R+20.1
Washington 2,320 39.8% 3,486 59.7% 30 5,836 R+20.0
Taylor 2,318 39.9% 3,467 59.7% 26 5,811 R+19.8
Calhoun 3,256 56.1% 2,499 43.0% 52 5,807 D+13.0
Monroe 2,948 51.1% 2,769 48.0% 51 5,768 D+3.1
Guthrie 2,567 44.7% 3,129 54.5% 48 5,744 R+9.8
Wayne 2,733 48.9% 2,842 50.8% 14 5,589 R+2.0
Decatur 2,883 51.8% 2,662 47.8% 21 5,566 D+4.0
Jefferson 2,246 40.4% 3,281 59.0% 38 5,565 R+18.6
Greene 2,720 49.3% 2,762 50.0% 38 5,520 R+0.8
Sac 2,891 52.6% 2,578 46.9% 29 5,498 D+5.7
Madison 2,245 41.2% 3,185 58.4% 24 5,454 R+17.2
Clay 3,111 58.4% 2,180 40.9% 34 5,325 D+17.5
Hancock 2,813 54.2% 2,348 45.2% 31 5,192 D+9.0
Mills 2,237 43.3% 2,912 56.3% 21 5,170 R+13.1
Adair 2,167 42.2% 2,953 57.5% 17 5,137 R+15.3
Mitchell 2,511 49.3% 2,522 49.5% 63 5,096 R+0.2
Lucas 2,242 44.1% 2,799 55.0% 46 5,087 R+10.9
Pocahontas 3,088 61.5% 1,898 37.8% 38 5,024 D+23.7
Butler 2,022 40.6% 2,896 58.1% 65 4,983 R+17.5
Davis 2,702 54.5% 2,240 45.2% 14 4,956 D+9.3
Winnebago 2,369 50.3% 2,263 48.1% 74 4,706 D+2.3
Lyon 2,520 54.3% 2,091 45.1% 29 4,640 D+9.2
Van Buren 1,799 39.0% 2,795 60.7% 13 4,607 R+21.6
Grundy 2,287 49.7% 2,285 49.7% 28 4,600 level
Ringgold 1,723 38.4% 2,739 61.1% 21 4,483 R+22.7
Franklin 2,426 54.5% 1,899 42.6% 130 4,455 D+11.8
Dickinson 2,542 57.5% 1,856 42.0% 26 4,424 D+15.5
Humboldt 2,330 53.8% 1,972 45.5% 32 4,334 D+8.3
Audubon 2,326 53.7% 1,980 45.7% 22 4,328 D+8.0
Adams 1,653 39.1% 2,552 60.4% 22 4,227 R+21.3
Louisa 1,766 42.6% 2,358 56.9% 18 4,142 R+14.3
Emmet 2,006 49.6% 2,015 49.8% 24 4,045 R+0.2
Ida 2,494 62.1% 1,483 37.0% 36 4,013 D+25.2
Worth 1,963 50.5% 1,904 49.0% 21 3,888 D+1.5
Clarke 1,833 47.8% 1,991 51.9% 14 3,838 R+4.1
Osceola 2,033 59.3% 1,381 40.3% 12 3,426 D+19.0

Counties as they stood in 1938; 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