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United States · Election results history · 1940 president · Iowa
Election 1940 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.

1940 presidential election in Iowa

Wendell Willkie (Republican) beat Franklin D. Roosevelt (Democrat) in Iowa in 1940, 52.0% to 47.6%, a margin of 4.4 points and 53,570 votes.

Iowa voted 14.4 points more Republican than the country as a whole, where the margin was D+10.0.

Iowa changed party: in 1936 it went Democratic, for Franklin D. Roosevelt.

Republicans led in 64 of the 99 counties as they stood then and Democrats in 35. The largest, Polk, cast 93,193 votes and went to the Democrat by 11.2 points. The closest was Poweshiek, where 21 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.

Result

CandidatePartyVotesShare
Wendell Willkie won Republican 632,370 52.0%
Franklin D. Roosevelt Democratic 578,800 47.6%
All other candidates 4,260 0.4%
Total1,215,430

Every county

CountyDemocratRepublicanOthersTotalMargin
Polk 51,647 55.4% 41,245 44.3% 301 93,193 D+11.2
Woodbury 24,457 51.6% 22,832 48.2% 89 47,378 D+3.4
Linn 19,531 45.2% 23,581 54.5% 123 43,235 R+9.4
Scott 20,996 53.0% 18,504 46.7% 130 39,630 D+6.3
Black Hawk 17,305 50.1% 17,132 49.6% 95 34,532 D+0.5
Pottawattamie 15,221 48.8% 15,929 51.1% 38 31,188 R+2.3
Dubuque 13,805 48.5% 14,590 51.3% 46 28,441 R+2.8
Clinton 10,251 45.6% 12,177 54.2% 50 22,478 R+8.6
Wapello 11,880 56.6% 9,039 43.0% 87 21,006 D+13.5
Cerro Gordo 10,839 52.6% 9,728 47.2% 45 20,612 D+5.4
Lee 9,117 46.1% 10,616 53.7% 33 19,766 R+7.6
Webster 10,731 58.4% 7,583 41.3% 52 18,366 D+17.1
Des Moines 6,578 37.3% 10,988 62.3% 59 17,625 R+25.0
Johnson 9,017 55.4% 7,206 44.3% 55 16,278 D+11.1
Jasper 8,129 52.7% 7,240 46.9% 52 15,421 D+5.8
Story 7,152 47.5% 7,853 52.1% 65 15,070 R+4.7
Marshall 6,497 43.1% 8,503 56.4% 65 15,065 R+13.3
Muscatine 5,825 40.4% 8,543 59.2% 53 14,421 R+18.8
Fayette 6,066 42.3% 8,237 57.4% 39 14,342 R+15.1
Marion 6,915 54.2% 5,763 45.2% 75 12,753 D+9.0
Dallas 6,279 49.7% 6,218 49.2% 131 12,628 D+0.5
Boone 7,168 57.5% 5,227 41.9% 74 12,469 D+15.6
Clayton 4,973 40.0% 7,443 59.9% 18 12,434 R+19.9
Appanoose 6,069 49.7% 6,032 49.4% 101 12,202 D+0.3
Kossuth 6,502 53.4% 5,639 46.4% 24 12,165 D+7.1
Mahaska 5,757 48.1% 6,123 51.1% 97 11,977 R+3.1
Tama 5,996 50.4% 5,865 49.3% 32 11,893 D+1.1
Sioux 4,144 35.3% 7,585 64.6% 21 11,750 R+29.3
Winneshiek 5,405 46.4% 6,208 53.3% 24 11,637 R+6.9
Plymouth 3,831 33.1% 7,725 66.7% 23 11,579 R+33.6
Page 4,102 35.5% 7,407 64.0% 57 11,566 R+28.6
Harrison 5,317 46.5% 6,094 53.3% 17 11,428 R+6.8
Carroll 5,526 50.6% 5,376 49.2% 21 10,923 D+1.4
Benton 5,363 50.2% 5,298 49.5% 32 10,693 D+0.6
Hardin 4,764 45.4% 5,692 54.3% 35 10,491 R+8.8
Buchanan 4,649 45.1% 5,630 54.6% 30 10,309 R+9.5
Cass 3,763 37.0% 6,377 62.7% 32 10,172 R+25.7
Floyd 4,167 41.5% 5,829 58.1% 35 10,031 R+16.6
Keokuk 4,552 45.6% 5,394 54.0% 42 9,988 R+8.4
Jones 4,273 43.0% 5,630 56.7% 26 9,929 R+13.7
Washington 4,030 41.5% 5,649 58.1% 42 9,721 R+16.7
Jackson 4,218 43.7% 5,417 56.1% 26 9,661 R+12.4
Poweshiek 4,794 49.9% 4,773 49.7% 44 9,611 D+0.2
Hamilton 5,279 55.6% 4,183 44.0% 39 9,501 D+11.5
Crawford 4,130 43.7% 5,284 55.9% 35 9,449 R+12.2
Buena Vista 4,784 50.9% 4,576 48.7% 39 9,399 D+2.2
Wright 4,871 52.1% 4,443 47.5% 36 9,350 D+4.6
Delaware 2,985 32.5% 6,175 67.3% 16 9,176 R+34.8
Allamakee 3,258 35.7% 5,840 64.0% 24 9,122 R+28.3
Monona 4,783 53.2% 4,192 46.6% 15 8,990 D+6.6
O'Brien 4,133 46.3% 4,760 53.3% 38 8,931 R+7.0
Warren 3,856 43.2% 5,016 56.2% 51 8,923 R+13.0
Cedar 3,293 37.3% 5,521 62.5% 26 8,840 R+25.2
Henry 2,837 32.4% 5,893 67.4% 19 8,749 R+34.9
Union 3,229 37.3% 5,421 62.5% 18 8,668 R+25.3
Bremer 3,103 36.5% 5,374 63.3% 18 8,495 R+26.7
Iowa 3,649 43.0% 4,696 55.3% 143 8,488 R+12.3
Shelby 3,811 45.0% 4,613 54.5% 36 8,460 R+9.5
Chickasaw 3,981 47.3% 4,440 52.7% 2 8,423 R+5.4
Jefferson 3,402 40.8% 4,891 58.7% 43 8,336 R+17.9
Cherokee 3,855 46.3% 4,458 53.5% 19 8,332 R+7.2
Guthrie 3,489 42.3% 4,733 57.3% 33 8,255 R+15.1
Montgomery 3,332 40.5% 4,848 59.0% 40 8,220 R+18.4
Calhoun 4,344 53.2% 3,792 46.5% 25 8,161 D+6.8
Sac 3,754 46.2% 4,358 53.7% 9 8,121 R+7.4
Clay 4,328 53.9% 3,673 45.8% 24 8,025 D+8.2
Palo Alto 4,482 57.3% 3,322 42.5% 18 7,822 D+14.8
Fremont 3,914 50.4% 3,825 49.3% 25 7,764 D+1.1
Butler 2,760 36.2% 4,848 63.6% 20 7,628 R+27.4
Madison 3,094 40.7% 4,477 58.9% 29 7,600 R+18.2
Greene 3,566 47.5% 3,920 52.2% 20 7,506 R+4.7
Decatur 3,938 52.9% 3,494 46.9% 16 7,448 D+6.0
Taylor 2,976 40.1% 4,420 59.6% 25 7,421 R+19.5
Howard 3,675 49.6% 3,714 50.2% 16 7,405 R+0.5
Wayne 3,625 49.0% 3,748 50.6% 28 7,401 R+1.7
Monroe 3,994 54.4% 3,270 44.6% 72 7,336 D+9.9
Franklin 3,540 48.4% 3,623 49.6% 147 7,310 R+1.1
Hancock 3,514 49.0% 3,632 50.6% 27 7,173 R+1.6
Lucas 3,255 45.5% 3,806 53.2% 88 7,149 R+7.7
Pocahontas 4,118 57.8% 2,985 41.9% 18 7,121 D+15.9
Mitchell 3,025 43.3% 3,947 56.5% 15 6,987 R+13.2
Mills 2,862 42.4% 3,873 57.4% 14 6,749 R+15.0
Grundy 2,745 41.1% 3,908 58.6% 21 6,674 R+17.4
Adair 2,734 41.1% 3,907 58.8% 7 6,648 R+17.6
Van Buren 2,416 36.9% 4,108 62.7% 26 6,550 R+25.8
Lyon 2,648 40.5% 3,880 59.3% 12 6,540 R+18.8
Winnebago 3,051 47.8% 3,308 51.8% 29 6,388 R+4.0
Davis 3,374 52.9% 2,975 46.7% 28 6,377 D+6.3
Emmet 3,097 50.0% 3,053 49.3% 47 6,197 D+0.7
Humboldt 3,268 53.2% 2,853 46.4% 22 6,143 D+6.8
Ringgold 2,374 40.3% 3,507 59.5% 13 5,894 R+19.2
Audubon 3,236 55.1% 2,632 44.8% 7 5,875 D+10.3
Dickinson 2,985 52.0% 2,736 47.6% 21 5,742 D+4.3
Louisa 2,247 39.9% 3,330 59.2% 50 5,627 R+19.2
Clarke 2,513 45.6% 2,962 53.8% 35 5,510 R+8.1
Ida 2,306 42.0% 3,166 57.7% 15 5,487 R+15.7
Worth 3,007 55.1% 2,434 44.6% 14 5,455 D+10.5
Adams 2,088 39.5% 3,182 60.1% 22 5,292 R+20.7
Osceola 2,288 48.2% 2,425 51.1% 29 4,742 R+2.9

Counties as they stood in 1940; 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 in every presidential election we hold

YearWinnerMargin
2024 Donald Trump (R) R+13.2
2020 Donald Trump (R) R+8.2
2016 Donald Trump (R) R+9.4
2012 Barack Obama (D) D+5.8
2008 Barack Obama (D) D+9.5
2004 George W. Bush (R) R+0.7
2000 Al Gore (D) D+0.3
1996 Bill Clinton (D) D+10.3
1992 Bill Clinton (D) D+6.0
1988 Michael Dukakis (D) D+10.2
1984 Ronald Reagan (R) R+7.4
1980 Ronald Reagan (R) R+12.7
1976 Gerald Ford (R) R+1.0
1972 Richard Nixon (R) R+17.1
1968 Richard Nixon (R) R+12.2
1964 Lyndon B. Johnson (D) D+24.0
1960 Richard Nixon (R) R+13.5
1956 Dwight D. Eisenhower (R) R+18.4
1952 Dwight D. Eisenhower (R) R+28.2
1948 Harry S. Truman (D) D+2.7
1944 Thomas E. Dewey (R) R+4.5
1940 Wendell Willkie (R) R+4.4
1936 Franklin D. Roosevelt (D) D+11.7
1932 Franklin D. Roosevelt (D) D+17.7
1928 Herbert Hoover (R) R+24.2
1924 Calvin Coolidge (R) R+38.4
1920 Warren G. Harding (R) R+45.4
1916 Charles Evans Hughes (R) R+12.0
1912 Woodrow Wilson (D) D+13.3
1908 William Howard Taft (R) R+15.0
1904 Theodore Roosevelt (R) R+32.7
1900 William McKinley (R) R+18.6
1896 William McKinley (R) R+12.6
1892 Benjamin Harrison (R) R+5.3
1888 Benjamin Harrison (R) R+7.8
1884 James G. Blaine (R) R+5.2
1880 James A. Garfield (R) R+24.1
1876 Rutherford B. Hayes (R) R+20.2
1872 Ulysses S. Grant (R) R+23.1
1868 Ulysses S. Grant (R) R+23.8