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United States · Election results history · 1930 Senate · Iowa
Election 1930 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.

1930 US Senate election in Iowa

Lester Dickinson (Republican) beat Daniel F. Steck (Democrat) in Iowa in 1930, 56.3% to 43.0%, a margin of 13.3 points and 72,427 votes.

The Republican hold continued from 1924, when Smith W. Brookhart won.

Republicans led in 82 of the 99 counties as they stood then and Democrats in 17. The largest, Polk, cast 24,261 votes and went to the Republican by 38.5 points. The closest was Howard, where 46 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
Lester Dickinson won Republican 307,613 56.3%
Daniel F. Steck Democratic 235,186 43.0%
All other candidates 3,715 0.7%
Total546,514

Every county

CountyDemocratRepublicanOthersTotalMargin
Polk 7,313 30.1% 16,662 68.7% 286 24,261 R+38.5
Clinton 8,982 61.1% 5,714 38.9% 5 14,701 D+22.2
Scott 7,614 52.6% 6,792 46.9% 69 14,475 D+5.7
Woodbury 6,739 47.7% 7,268 51.5% 110 14,117 R+3.7
Linn 6,077 45.3% 7,283 54.3% 55 13,415 R+9.0
Lee 6,462 54.8% 5,211 44.2% 125 11,798 D+10.6
Pottawattamie 5,201 44.2% 6,228 53.0% 326 11,755 R+8.7
Dubuque 7,552 65.4% 3,874 33.6% 114 11,540 D+31.9
Wapello 4,655 47.8% 5,048 51.8% 42 9,745 R+4.0
Johnson 5,110 54.8% 4,199 45.1% 8 9,317 D+9.8
Black Hawk 3,087 34.5% 5,737 64.2% 114 8,938 R+29.6
Des Moines 4,357 50.0% 4,267 49.0% 86 8,710 D+1.0
Webster 3,784 44.0% 4,683 54.4% 142 8,609 R+10.4
Marion 3,577 45.4% 4,253 54.0% 50 7,880 R+8.6
Harrison 3,922 52.2% 3,578 47.6% 9 7,509 D+4.6
Appanoose 2,876 40.4% 4,197 59.0% 46 7,119 R+18.6
Tama 3,312 46.6% 3,762 52.9% 40 7,114 R+6.3
Fayette 2,656 37.4% 4,412 62.1% 33 7,101 R+24.7
Keokuk 3,514 49.6% 3,566 50.3% 10 7,090 R+0.7
Clayton 3,136 44.4% 3,907 55.3% 23 7,066 R+10.9
Plymouth 3,773 56.0% 2,945 43.7% 19 6,737 D+12.3
Jasper 2,632 39.3% 4,047 60.4% 19 6,698 R+21.1
Winneshiek 3,359 51.8% 3,090 47.7% 33 6,482 D+4.1
Carroll 3,599 57.4% 2,655 42.3% 18 6,272 D+15.1
Allamakee 2,674 43.4% 3,476 56.4% 10 6,160 R+13.0
Mahaska 2,430 40.2% 3,507 58.1% 101 6,038 R+17.8
Boone 1,385 24.1% 4,186 72.7% 185 5,756 R+48.7
Jackson 3,041 52.9% 2,686 46.8% 18 5,745 D+6.2
Marshall 2,004 34.9% 3,703 64.5% 31 5,738 R+29.6
Dallas 1,602 28.1% 4,048 71.1% 45 5,695 R+42.9
Page 1,852 33.3% 3,686 66.3% 18 5,556 R+33.0
Washington 2,211 40.4% 3,246 59.3% 17 5,474 R+18.9
Shelby 2,848 52.7% 2,546 47.1% 11 5,405 D+5.6
Crawford 2,762 51.2% 2,586 47.9% 48 5,396 D+3.3
Chickasaw 2,588 48.2% 2,773 51.7% 3 5,364 R+3.4
Cass 1,747 32.6% 3,592 67.1% 13 5,352 R+34.5
Buchanan 2,042 38.7% 3,225 61.1% 8 5,275 R+22.4
Iowa 2,311 44.1% 2,900 55.4% 24 5,235 R+11.3
Kossuth 2,540 49.0% 2,622 50.6% 23 5,185 R+1.6
Wayne 2,340 45.5% 2,781 54.0% 25 5,146 R+8.6
Benton 2,213 43.1% 2,813 54.8% 108 5,134 R+11.7
Guthrie 2,056 40.4% 3,008 59.1% 29 5,093 R+18.7
Decatur 2,254 44.4% 2,808 55.4% 9 5,071 R+10.9
Taylor 1,994 39.6% 3,027 60.1% 13 5,034 R+20.5
Warren 1,811 36.3% 3,173 63.5% 10 4,994 R+27.3
Monroe 1,998 40.4% 2,898 58.6% 47 4,943 R+18.2
Davis 2,797 57.0% 2,106 42.9% 4 4,907 D+14.1
Jones 2,298 47.5% 2,533 52.4% 4 4,835 R+4.9
Bremer 2,809 58.2% 2,017 41.8% 3 4,829 D+16.4
Jefferson 1,741 37.2% 2,916 62.2% 28 4,685 R+25.1
Cerro Gordo 1,468 31.3% 3,171 67.7% 44 4,683 R+36.4
Fremont 2,555 55.0% 2,084 44.9% 5 4,644 D+10.1
Poweshiek 1,757 38.1% 2,847 61.7% 13 4,617 R+23.6
Howard 2,277 49.5% 2,323 50.5% 4 4,604 R+1.0
Henry 1,876 40.9% 2,696 58.7% 20 4,592 R+17.9
Van Buren 1,985 43.5% 2,559 56.0% 23 4,567 R+12.6
Muscatine 1,654 36.3% 2,887 63.4% 13 4,554 R+27.1
Cedar 1,810 40.7% 2,608 58.7% 25 4,443 R+18.0
Monona 2,081 47.2% 2,318 52.6% 11 4,410 R+5.4
Union 1,626 37.0% 2,755 62.7% 14 4,395 R+25.7
Madison 1,494 34.2% 2,868 65.6% 11 4,373 R+31.4
Calhoun 1,638 38.6% 2,565 60.4% 45 4,248 R+21.8
Montgomery 1,506 36.5% 2,608 63.1% 17 4,131 R+26.7
Floyd 1,222 31.6% 2,600 67.3% 40 3,862 R+35.7
Story 1,104 28.7% 2,728 70.8% 19 3,851 R+42.2
Buena Vista 1,416 37.0% 2,398 62.6% 18 3,832 R+25.6
Delaware 1,269 33.6% 2,504 66.2% 7 3,780 R+32.7
Ringgold 1,208 32.0% 2,560 67.9% 3 3,771 R+35.9
Clay 1,346 36.1% 2,320 62.3% 60 3,726 R+26.1
Wright 1,096 29.7% 2,532 68.7% 58 3,686 R+39.0
Adams 1,385 38.0% 2,237 61.4% 21 3,643 R+23.4
Audubon 1,854 51.1% 1,763 48.6% 9 3,626 D+2.5
Hamilton 1,472 40.8% 2,128 58.9% 12 3,612 R+18.2
Adair 1,169 32.6% 2,414 67.2% 7 3,590 R+34.7
Mills 1,527 42.7% 2,040 57.0% 10 3,577 R+14.3
Cherokee 1,631 45.7% 1,926 53.9% 13 3,570 R+8.3
Palo Alto 1,594 45.0% 1,920 54.2% 31 3,545 R+9.2
Pocahontas 1,501 43.1% 1,926 55.3% 55 3,482 R+12.2
Grundy 989 29.5% 2,356 70.2% 13 3,358 R+40.7
Louisa 1,251 37.3% 2,100 62.6% 5 3,356 R+25.3
Clarke 1,248 37.9% 2,033 61.7% 13 3,294 R+23.8
Sioux 1,349 41.0% 1,932 58.7% 12 3,293 R+17.7
Lucas 1,274 39.5% 1,928 59.8% 20 3,222 R+20.3
Mitchell 979 30.9% 2,159 68.1% 32 3,170 R+37.2
Hancock 892 29.6% 2,112 70.0% 14 3,018 R+40.4
Greene 895 30.1% 2,059 69.3% 17 2,971 R+39.2
Lyon 1,061 36.9% 1,790 62.2% 26 2,877 R+25.3
Ida 1,111 39.4% 1,691 59.9% 21 2,823 R+20.5
O'Brien 985 36.8% 1,688 63.0% 6 2,679 R+26.2
Hardin 783 29.3% 1,861 69.5% 32 2,676 R+40.3
Butler 763 29.3% 1,831 70.2% 13 2,607 R+41.0
Winnebago 553 21.7% 1,878 73.7% 117 2,548 R+52.0
Sac 879 36.2% 1,524 62.7% 28 2,431 R+26.5
Osceola 917 41.2% 1,304 58.5% 7 2,228 R+17.4
Franklin 641 29.1% 1,532 69.5% 32 2,205 R+40.4
Emmet 615 28.4% 1,533 70.8% 17 2,165 R+42.4
Dickinson 688 34.1% 1,303 64.6% 25 2,016 R+30.5
Humboldt 589 29.9% 1,373 69.6% 11 1,973 R+39.7
Worth 566 33.4% 1,101 64.9% 29 1,696 R+31.5

Counties as they stood in 1930; 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