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United States · Election results history · 1920 president · Iowa
Election 1920 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.

1920 presidential election in Iowa

Warren G. Harding (Republican) beat James M. Cox (Democrat) in Iowa in 1920, 70.9% to 25.5%, a margin of 45.4 points and 406,747 votes.

Iowa voted 19.3 points more Republican than the country as a whole, where the margin was R+26.2.

The Republican hold continued from 1916, when Charles Evans Hughes won.

Republicans led in 99 of the 99 counties as they stood then. The largest, Polk, cast 53,986 votes and went to the Republican by 36.7 points. The closest was Johnson, where 664 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
Warren G. Harding won Republican 634,671 70.9%
James M. Cox Democratic 227,924 25.5%
All other candidates 32,487 3.6%
Total895,082

Every county

CountyDemocratRepublicanOthersTotalMargin
Polk 16,281 30.2% 36,073 66.8% 1,632 53,986 R+36.7
Woodbury 9,815 34.6% 17,603 62.1% 944 28,362 R+27.5
Linn 6,932 24.9% 20,036 72.0% 853 27,821 R+47.1
Scott 5,473 19.8% 16,233 58.7% 5,925 27,631 R+38.9
Black Hawk 4,000 18.1% 16,920 76.6% 1,181 22,101 R+58.5
Dubuque 7,636 36.4% 12,436 59.2% 928 21,000 R+22.9
Pottawattamie 6,659 31.9% 13,506 64.7% 722 20,887 R+32.8
Clinton 3,153 18.0% 11,746 67.0% 2,637 17,536 R+49.0
Lee 5,177 31.7% 10,763 65.9% 383 16,323 R+34.2
Wapello 4,131 28.4% 9,884 68.0% 522 14,537 R+39.6
Des Moines 3,449 26.5% 8,287 63.8% 1,261 12,997 R+37.2
Webster 2,804 21.6% 8,312 64.0% 1,872 12,988 R+42.4
Marshall 2,166 18.4% 9,334 79.1% 300 11,800 R+60.7
Muscatine 2,293 19.9% 8,115 70.3% 1,136 11,544 R+50.4
Jasper 3,390 30.7% 7,417 67.2% 222 11,029 R+36.5
Cerro Gordo 2,302 21.0% 8,293 75.7% 356 10,951 R+54.7
Johnson 5,032 46.1% 5,696 52.1% 195 10,923 R+6.1
Story 1,909 17.7% 8,713 80.8% 162 10,784 R+63.1
Fayette 1,941 18.6% 8,265 79.1% 238 10,444 R+60.6
Mahaska 3,339 32.0% 6,739 64.5% 362 10,440 R+32.6
Boone 2,240 22.4% 7,093 71.1% 647 9,980 R+48.6
Appanoose 2,952 30.3% 6,382 65.5% 409 9,743 R+35.2
Harrison 3,479 35.7% 6,127 62.9% 136 9,742 R+27.2
Marion 3,861 40.2% 5,435 56.6% 303 9,599 R+16.4
Dallas 2,577 27.3% 6,677 70.6% 200 9,454 R+43.4
Benton 2,343 25.4% 6,539 71.0% 325 9,207 R+45.6
Keokuk 2,800 30.7% 6,207 67.9% 128 9,135 R+37.3
Page 1,931 21.1% 6,949 76.1% 251 9,131 R+55.0
Tama 2,552 28.1% 6,352 70.0% 169 9,073 R+41.9
Winneshiek 1,933 22.0% 6,684 76.0% 180 8,797 R+54.0
Clayton 1,808 20.8% 6,747 77.5% 151 8,706 R+56.7
Carroll 2,174 25.1% 6,320 72.9% 177 8,671 R+47.8
Jones 2,436 28.8% 5,962 70.5% 63 8,461 R+41.7
Cass 1,668 19.9% 6,558 78.2% 157 8,383 R+58.3
Washington 2,257 27.6% 5,813 71.1% 107 8,177 R+43.5
Poweshiek 2,125 26.1% 5,803 71.4% 199 8,127 R+45.3
Buchanan 1,690 20.9% 6,334 78.3% 63 8,087 R+57.4
Plymouth 1,801 22.5% 6,090 76.2% 105 7,996 R+53.6
Crawford 2,151 27.0% 5,473 68.7% 348 7,972 R+41.7
Hardin 1,076 13.6% 6,646 84.0% 193 7,915 R+70.4
Kossuth 1,682 21.7% 6,018 77.5% 69 7,769 R+55.8
Sioux 1,510 19.7% 6,068 79.3% 75 7,653 R+59.6
Warren 2,066 27.4% 5,323 70.5% 160 7,549 R+43.1
Monroe 2,081 28.3% 4,500 61.2% 771 7,352 R+32.9
Cedar 1,420 19.4% 5,697 77.9% 198 7,315 R+58.5
Henry 1,939 26.5% 5,254 71.9% 113 7,306 R+45.4
Bremer 902 12.4% 6,287 86.5% 80 7,269 R+74.1
Floyd 933 13.0% 6,106 84.8% 158 7,197 R+71.9
Hamilton 1,126 15.8% 5,924 82.9% 98 7,148 R+67.1
Guthrie 1,647 23.2% 5,338 75.2% 114 7,099 R+52.0
Allamakee 1,833 25.9% 5,192 73.2% 65 7,090 R+47.4
Delaware 1,111 15.7% 5,880 83.0% 97 7,088 R+67.3
Wright 1,205 17.0% 5,739 81.0% 138 7,082 R+64.0
Jackson 1,954 27.9% 4,763 68.0% 288 7,005 R+40.1
Iowa 2,019 28.9% 4,892 69.9% 86 6,997 R+41.1
Taylor 1,757 25.5% 4,997 72.4% 147 6,901 R+46.9
Calhoun 1,479 21.6% 5,277 76.9% 102 6,858 R+55.4
Decatur 2,592 37.9% 4,187 61.2% 66 6,845 R+23.3
Butler 830 12.2% 5,900 86.7% 76 6,806 R+74.5
Union 2,228 32.7% 4,466 65.6% 111 6,805 R+32.9
Wayne 2,434 35.9% 4,234 62.5% 105 6,773 R+26.6
Chickasaw 2,171 32.2% 4,517 67.0% 56 6,744 R+34.8
O'Brien 1,468 21.9% 5,137 76.5% 109 6,714 R+54.6
Monona 1,960 29.8% 4,569 69.5% 46 6,575 R+39.7
Shelby 1,882 28.7% 4,621 70.5% 47 6,550 R+41.8
Montgomery 1,404 21.6% 4,980 76.5% 126 6,510 R+54.9
Madison 1,899 29.3% 4,465 68.8% 123 6,487 R+39.6
Greene 1,303 20.2% 5,102 79.0% 55 6,460 R+58.8
Fremont 2,524 39.7% 3,776 59.3% 64 6,364 R+19.7
Sac 1,268 20.0% 4,984 78.7% 82 6,334 R+58.7
Buena Vista 1,204 19.2% 4,927 78.6% 139 6,270 R+59.4
Jefferson 1,450 23.7% 4,558 74.6% 100 6,108 R+50.9
Van Buren 1,682 27.6% 4,321 71.0% 83 6,086 R+43.4
Cherokee 1,211 20.7% 4,544 77.7% 94 5,849 R+57.0
Pocahontas 1,639 28.4% 4,046 70.1% 89 5,774 R+41.7
Clay 1,001 17.9% 4,471 80.1% 113 5,585 R+62.1
Adair 1,358 24.4% 4,133 74.3% 72 5,563 R+49.9
Davis 2,353 42.5% 3,117 56.3% 65 5,535 R+13.8
Lucas 1,463 26.6% 3,775 68.6% 268 5,506 R+42.0
Palo Alto 1,467 26.8% 3,904 71.4% 95 5,466 R+44.6
Grundy 714 13.1% 4,662 85.8% 56 5,432 R+72.7
Howard 1,717 31.7% 3,601 66.5% 100 5,418 R+34.8
Mills 1,592 29.8% 3,683 69.0% 63 5,338 R+39.2
Mitchell 773 14.5% 4,476 83.9% 83 5,332 R+69.4
Franklin 601 11.8% 4,397 86.1% 111 5,109 R+74.3
Ringgold 1,327 26.0% 3,702 72.7% 66 5,095 R+46.6
Ida 1,090 23.3% 3,547 75.7% 47 4,684 R+52.5
Louisa 962 20.8% 3,560 77.0% 102 4,624 R+56.2
Adams 1,670 36.6% 2,845 62.4% 42 4,557 R+25.8
Winnebago 469 10.4% 3,931 87.1% 114 4,514 R+76.7
Hancock 725 16.2% 3,617 80.8% 132 4,474 R+64.6
Lyon 729 16.3% 3,633 81.5% 97 4,459 R+65.1
Clarke 1,257 28.2% 3,150 70.8% 43 4,450 R+42.5
Emmet 991 22.4% 3,360 76.0% 70 4,421 R+53.6
Audubon 1,405 32.1% 2,963 67.7% 10 4,378 R+35.6
Humboldt 681 15.8% 3,577 82.8% 61 4,319 R+67.1
Dickinson 760 18.5% 3,298 80.4% 43 4,101 R+61.9
Worth 516 12.9% 3,401 84.8% 92 4,009 R+72.0
Osceola 754 21.3% 2,717 76.7% 70 3,541 R+55.4

Counties as they stood in 1920; 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