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United States · Election results history · 1948 president · Iowa
Election 1948 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.

1948 presidential election in Iowa

Harry S. Truman (Democrat) beat Thomas E. Dewey (Republican) in Iowa in 1948, 50.3% to 47.6%, a margin of 2.7 points and 28,362 votes.

Iowa voted 1.8 points more Republican than the country as a whole, where the margin was D+4.5.

Iowa changed party: in 1944 it went Republican, for Thomas E. Dewey.

Democrats led in 53 of the 99 counties as they stood then and Republicans in 46. The largest, Polk, cast 81,379 votes and went to the Democrat by 14.2 points. The closest was Guthrie, where 3 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
Harry S. Truman won Democratic 522,380 50.3%
Thomas E. Dewey Republican 494,018 47.6%
All other candidates 21,866 2.1%
Total1,038,264

Every county

CountyDemocratRepublicanOthersTotalMargin
Polk 45,289 55.7% 33,742 41.5% 2,348 81,379 D+14.2
Linn 20,995 48.7% 20,881 48.5% 1,222 43,098 D+0.3
Woodbury 22,056 56.4% 16,655 42.6% 373 39,084 D+13.8
Black Hawk 19,603 54.1% 16,041 44.3% 586 36,230 D+9.8
Scott 16,661 48.9% 16,842 49.4% 578 34,081 R+0.5
Dubuque 15,521 59.9% 10,111 39.0% 281 25,913 D+20.9
Pottawattamie 11,430 47.4% 12,384 51.4% 281 24,095 R+4.0
Wapello 10,841 57.1% 7,875 41.5% 260 18,976 D+15.6
Clinton 8,534 45.7% 9,859 52.8% 272 18,665 R+7.1
Cerro Gordo 9,544 54.0% 7,840 44.3% 298 17,682 D+9.6
Lee 9,201 53.5% 7,801 45.3% 210 17,212 D+8.1
Webster 9,508 55.7% 6,951 40.7% 607 17,066 D+15.0
Des Moines 8,792 52.6% 7,621 45.6% 316 16,729 D+7.0
Johnson 8,611 52.8% 7,139 43.8% 553 16,303 D+9.0
Story 6,152 40.3% 8,307 54.5% 792 15,251 R+14.1
Marshall 5,602 43.7% 6,698 52.2% 533 12,833 R+8.5
Jasper 6,684 52.3% 5,710 44.7% 392 12,786 D+7.6
Fayette 5,303 45.1% 6,296 53.5% 161 11,760 R+8.4
Muscatine 5,466 47.1% 6,003 51.7% 146 11,615 R+4.6
Marion 6,300 58.0% 4,312 39.7% 258 10,870 D+18.3
Dallas 5,661 52.3% 4,810 44.5% 348 10,819 D+7.9
Kossuth 6,039 58.3% 4,186 40.4% 128 10,353 D+17.9
Boone 5,541 54.2% 4,183 40.9% 498 10,222 D+13.3
Clayton 4,857 48.0% 5,151 50.9% 103 10,111 R+2.9
Tama 5,115 51.0% 4,763 47.5% 150 10,028 D+3.5
Sioux 4,042 41.2% 5,597 57.1% 162 9,801 R+15.9
Carroll 5,711 58.4% 3,974 40.6% 101 9,786 D+17.7
Winneshiek 4,905 50.8% 4,594 47.5% 164 9,663 D+3.2
Plymouth 4,339 46.1% 5,002 53.1% 75 9,416 R+7.0
Page 3,567 38.1% 5,638 60.1% 169 9,374 R+22.1
Appanoose 4,998 53.8% 4,078 43.9% 220 9,296 D+9.9
Mahaska 4,327 47.9% 4,238 46.9% 465 9,030 D+1.0
Harrison 4,608 51.1% 4,341 48.1% 67 9,016 D+3.0
Hardin 4,023 45.4% 4,553 51.4% 278 8,854 R+6.0
Cass 3,372 39.4% 5,106 59.7% 81 8,559 R+20.3
Buchanan 4,127 48.4% 4,310 50.6% 86 8,523 R+2.1
Floyd 3,688 43.4% 4,644 54.7% 165 8,497 R+11.3
Buena Vista 4,340 51.1% 3,959 46.6% 194 8,493 D+4.5
Keokuk 4,118 48.6% 4,201 49.6% 156 8,475 R+1.0
Poweshiek 4,324 51.6% 3,888 46.4% 173 8,385 D+5.2
Benton 4,209 50.3% 3,770 45.1% 388 8,367 D+5.2
Jones 3,915 47.0% 4,290 51.6% 117 8,322 R+4.5
Washington 3,485 42.3% 4,680 56.8% 80 8,245 R+14.5
Henry 3,042 39.0% 4,620 59.2% 143 7,805 R+20.2
Wright 3,866 49.6% 3,810 48.8% 124 7,800 D+0.7
Allamakee 3,172 41.1% 4,474 57.9% 80 7,726 R+16.9
Warren 3,481 45.8% 3,876 51.0% 248 7,605 R+5.2
Chickasaw 4,071 53.6% 3,449 45.4% 69 7,589 D+8.2
Delaware 2,876 38.4% 4,555 60.7% 67 7,498 R+22.4
Crawford 3,983 53.2% 3,267 43.6% 235 7,485 D+9.6
Bremer 3,502 47.1% 3,837 51.6% 94 7,433 R+4.5
Union 3,218 43.4% 4,138 55.8% 58 7,414 R+12.4
Sac 3,699 50.2% 3,505 47.6% 159 7,363 D+2.6
Monona 4,098 55.8% 3,179 43.3% 69 7,346 D+12.5
Hamilton 3,613 49.2% 3,535 48.1% 197 7,345 D+1.1
O'Brien 3,421 46.7% 3,697 50.5% 208 7,326 R+3.8
Cherokee 3,739 52.3% 3,318 46.4% 87 7,144 D+5.9
Jefferson 3,033 42.8% 3,906 55.1% 149 7,088 R+12.3
Cedar 2,958 42.2% 3,957 56.4% 101 7,016 R+14.2
Jackson 3,263 46.6% 3,597 51.3% 145 7,005 R+4.8
Iowa 3,030 43.4% 3,659 52.4% 289 6,978 R+9.0
Clay 3,649 52.4% 3,036 43.6% 276 6,961 D+8.8
Shelby 3,499 50.5% 3,301 47.6% 135 6,935 D+2.9
Montgomery 2,751 39.8% 4,084 59.1% 75 6,910 R+19.3
Guthrie 3,392 49.2% 3,389 49.2% 110 6,891 level
Palo Alto 3,858 58.4% 2,594 39.3% 149 6,601 D+19.1
Butler 3,008 46.2% 3,380 51.9% 125 6,513 R+5.7
Calhoun 3,164 49.5% 3,083 48.2% 151 6,398 D+1.3
Greene 2,946 46.8% 3,059 48.6% 285 6,290 R+1.8
Madison 2,827 46.2% 3,207 52.4% 89 6,123 R+6.2
Wayne 3,314 54.1% 2,738 44.7% 71 6,123 D+9.4
Mitchell 2,873 47.0% 3,021 49.4% 225 6,119 R+2.4
Howard 3,378 55.5% 2,630 43.2% 82 6,090 D+12.3
Hancock 3,096 51.2% 2,802 46.3% 153 6,051 D+4.9
Pocahontas 3,500 57.8% 2,397 39.6% 154 6,051 D+18.2
Franklin 2,871 47.7% 2,716 45.1% 434 6,021 D+2.6
Monroe 3,445 58.1% 2,371 40.0% 110 5,926 D+18.1
Decatur 3,172 54.7% 2,547 43.9% 84 5,803 D+10.8
Taylor 2,402 42.2% 3,244 56.9% 52 5,698 R+14.8
Grundy 2,344 41.5% 3,154 55.9% 149 5,647 R+14.3
Adair 2,567 46.5% 2,879 52.1% 77 5,523 R+5.6
Lucas 2,697 49.3% 2,656 48.5% 122 5,475 D+0.7
Winnebago 2,626 48.2% 2,636 48.4% 189 5,451 R+0.2
Humboldt 2,855 52.6% 2,498 46.0% 79 5,432 D+6.6
Fremont 2,637 49.0% 2,698 50.2% 43 5,378 R+1.1
Emmet 2,752 51.8% 2,464 46.4% 97 5,313 D+5.4
Davis 2,982 56.2% 2,276 42.9% 47 5,305 D+13.3
Audubon 2,840 55.1% 2,177 42.2% 136 5,153 D+12.9
Mills 2,155 42.2% 2,921 57.2% 31 5,107 R+15.0
Dickinson 2,324 48.8% 2,304 48.3% 138 4,766 D+0.4
Lyon 2,174 45.9% 2,500 52.7% 66 4,740 R+6.9
Ida 2,365 50.3% 2,257 48.0% 76 4,698 D+2.3
Van Buren 1,917 40.9% 2,702 57.6% 69 4,688 R+16.7
Worth 2,623 56.6% 1,878 40.5% 136 4,637 D+16.1
Ringgold 1,922 43.1% 2,487 55.8% 50 4,459 R+12.7
Louisa 1,945 43.9% 2,420 54.6% 64 4,429 R+10.7
Clarke 2,101 48.0% 2,195 50.1% 83 4,379 R+2.1
Adams 1,817 45.3% 2,142 53.4% 53 4,012 R+8.1
Osceola 2,123 53.9% 1,772 45.0% 44 3,939 D+8.9

Counties as they stood in 1948; 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