Iowa — 1940 presidential election
Recent presidential results
Akashicstate1940 presidential electionIowa · PresidentWillkieR+4.4
How it voted
Share of the 1940 vote
| Wendell Willkie ✓Republican | 52.0% | 632,370 |
|---|---|---|
| Franklin D. RooseveltDemocratic | 47.6% | 578,802 |
| OtherAll other candidates | 0.4% | 4,260 |
1940presidential margin
D+60R+60
99 counties, each filled by 1940 D-vs-R margin. Hover any county for its result.
Iowa cast 11 electoral votes this cycle.
County-level results (99 counties) — table
| County | Winner | Margin |
|---|---|---|
| Adair County, IA | Republican | R+17.6 |
| Adams County, IA | Republican | R+20.7 |
| Allamakee County, IA | Republican | R+28.3 |
| Appanoose County, IA | Democratic | D+0.3 |
| Audubon County, IA | Democratic | D+10.3 |
| Benton County, IA | Democratic | D+0.6 |
| Black Hawk County, IA | Democratic | D+0.5 |
| Boone County, IA | Democratic | D+15.6 |
| Bremer County, IA | Republican | R+26.7 |
| Buchanan County, IA | Republican | R+9.5 |
| Buena Vista County, IA | Democratic | D+2.2 |
| Butler County, IA | Republican | R+27.4 |
| Calhoun County, IA | Democratic | D+6.8 |
| Carroll County, IA | Democratic | D+1.4 |
| Cass County, IA | Republican | R+25.7 |
| Cedar County, IA | Republican | R+25.2 |
| Cerro Gordo County, IA | Democratic | D+5.4 |
| Cherokee County, IA | Republican | R+7.2 |
| Chickasaw County, IA | Republican | R+5.4 |
| Clarke County, IA | Republican | R+8.1 |
| Clay County, IA | Democratic | D+8.2 |
| Clayton County, IA | Republican | R+19.9 |
| Clinton County, IA | Republican | R+8.6 |
| Crawford County, IA | Republican | R+12.2 |
| Dallas County, IA | Democratic | D+0.5 |
| Davis County, IA | Democratic | D+6.3 |
| Decatur County, IA | Democratic | D+6.0 |
| Delaware County, IA | Republican | R+34.8 |
| Des Moines County, IA | Republican | R+25.0 |
| Dickinson County, IA | Democratic | D+4.3 |
| Dubuque County, IA | Republican | R+2.8 |
| Emmet County, IA | Democratic | D+0.7 |
| Fayette County, IA | Republican | R+15.1 |
| Floyd County, IA | Republican | R+16.6 |
| Franklin County, IA | Republican | R+1.1 |
| Fremont County, IA | Democratic | D+1.1 |
| Greene County, IA | Republican | R+4.7 |
| Grundy County, IA | Republican | R+17.4 |
| Guthrie County, IA | Republican | R+15.1 |
| Hamilton County, IA | Democratic | D+11.5 |
| Hancock County, IA | Republican | R+1.6 |
| Hardin County, IA | Republican | R+8.8 |
| Harrison County, IA | Republican | R+6.8 |
| Henry County, IA | Republican | R+34.9 |
| Howard County, IA | Republican | R+0.5 |
| Humboldt County, IA | Democratic | D+6.8 |
| Ida County, IA | Republican | R+15.7 |
| Iowa County, IA | Republican | R+12.3 |
| Jackson County, IA | Republican | R+12.4 |
| Jasper County, IA | Democratic | D+5.8 |
| Jefferson County, IA | Republican | R+17.9 |
| Johnson County, IA | Democratic | D+11.1 |
| Jones County, IA | Republican | R+13.7 |
| Keokuk County, IA | Republican | R+8.4 |
| Kossuth County, IA | Democratic | D+7.1 |
| Lee County, IA | Republican | R+7.6 |
| Linn County, IA | Republican | R+9.4 |
| Louisa County, IA | Republican | R+19.2 |
| Lucas County, IA | Republican | R+7.7 |
| Lyon County, IA | Republican | R+18.8 |
| Madison County, IA | Republican | R+18.2 |
| Mahaska County, IA | Republican | R+3.1 |
| Marion County, IA | Democratic | D+9.0 |
| Marshall County, IA | Republican | R+13.3 |
| Mills County, IA | Republican | R+15.0 |
| Mitchell County, IA | Republican | R+13.2 |
| Monona County, IA | Democratic | D+6.6 |
| Monroe County, IA | Democratic | D+9.9 |
| Montgomery County, IA | Republican | R+18.4 |
| Muscatine County, IA | Republican | R+18.8 |
| O'Brien County, IA | Republican | R+7.0 |
| Osceola County, IA | Republican | R+2.9 |
| Page County, IA | Republican | R+28.6 |
| Palo Alto County, IA | Democratic | D+14.8 |
| Plymouth County, IA | Republican | R+33.6 |
| Pocahontas County, IA | Democratic | D+15.9 |
| Polk County, IA | Democratic | D+11.2 |
| Pottawattamie County, IA | Republican | R+2.3 |
| Poweshiek County, IA | Democratic | D+0.2 |
| Ringgold County, IA | Republican | R+19.2 |
| Sac County, IA | Republican | R+7.4 |
| Scott County, IA | Democratic | D+6.3 |
| Shelby County, IA | Republican | R+9.5 |
| Sioux County, IA | Republican | R+29.3 |
| Story County, IA | Republican | R+4.7 |
| Tama County, IA | Democratic | D+1.1 |
| Taylor County, IA | Republican | R+19.5 |
| Union County, IA | Republican | R+25.3 |
| Van Buren County, IA | Republican | R+25.8 |
| Wapello County, IA | Democratic | D+13.5 |
| Warren County, IA | Republican | R+13.0 |
| Washington County, IA | Republican | R+16.7 |
| Wayne County, IA | Republican | R+1.7 |
| Webster County, IA | Democratic | D+17.1 |
| Winnebago County, IA | Republican | R+4.0 |
| Winneshiek County, IA | Republican | R+6.9 |
| Woodbury County, IA | Democratic | D+3.4 |
| Worth County, IA | Democratic | D+10.5 |
| Wright County, IA | Democratic | D+4.6 |
Iowa results by county
99 counties. Third-party and independent votes are reported by the county source as one combined figure; every named candidate is listed in the complete result below.
| Led by | |||||
|---|---|---|---|---|---|
| Adair County | Wendell Willkie+1,173 | 3,90758.8% | 2,73441.1% | 70.1% | 6,648 |
| Adams County | Wendell Willkie+1,094 | 3,18260.1% | 2,08839.5% | 220.4% | 5,292 |
| Allamakee County | Wendell Willkie+2,582 | 5,84064.0% | 3,25835.7% | 240.3% | 9,122 |
| Appanoose County | Franklin D. Roosevelt+37 | 6,03249.4% | 6,06949.7% | 1010.8% | 12,202 |
| Audubon County | Franklin D. Roosevelt+604 | 2,63244.8% | 3,23655.1% | 70.1% | 5,875 |
| Benton County | Franklin D. Roosevelt+65 | 5,29849.5% | 5,36350.2% | 320.3% | 10,693 |
| Black Hawk County | Franklin D. Roosevelt+173 | 17,13249.6% | 17,30550.1% | 950.3% | 34,532 |
| Boone County | Franklin D. Roosevelt+1,941 | 5,22741.9% | 7,16857.5% | 740.6% | 12,469 |
| Bremer County | Wendell Willkie+2,271 | 5,37463.3% | 3,10336.5% | 180.2% | 8,495 |
| Buchanan County | Wendell Willkie+981 | 5,63054.6% | 4,64945.1% | 300.3% | 10,309 |
| Buena Vista County | Franklin D. Roosevelt+208 | 4,57648.7% | 4,78450.9% | 390.4% | 9,399 |
| Butler County | Wendell Willkie+2,088 | 4,84863.6% | 2,76036.2% | 200.3% | 7,628 |
| Calhoun County | Franklin D. Roosevelt+552 | 3,79246.5% | 4,34453.2% | 250.3% | 8,161 |
| Carroll County | Franklin D. Roosevelt+150 | 5,37649.2% | 5,52650.6% | 210.2% | 10,923 |
| Cass County | Wendell Willkie+2,614 | 6,37762.7% | 3,76337.0% | 320.3% | 10,172 |
| Cedar County | Wendell Willkie+2,228 | 5,52162.5% | 3,29337.3% | 260.3% | 8,840 |
| Cerro Gordo County | Franklin D. Roosevelt+1,111 | 9,72847.2% | 10,83952.6% | 450.2% | 20,612 |
| Cherokee County | Wendell Willkie+603 | 4,45853.5% | 3,85546.3% | 190.2% | 8,332 |
| Chickasaw County | Wendell Willkie+459 | 4,44052.7% | 3,98147.3% | 20.0% | 8,423 |
| Clarke County | Wendell Willkie+449 | 2,96253.8% | 2,51345.6% | 350.6% | 5,510 |
| Clay County | Franklin D. Roosevelt+655 | 3,67345.8% | 4,32853.9% | 240.3% | 8,025 |
| Clayton County | Wendell Willkie+2,470 | 7,44359.9% | 4,97340.0% | 180.1% | 12,434 |
| Clinton County | Wendell Willkie+1,926 | 12,17754.2% | 10,25145.6% | 500.2% | 22,478 |
| Crawford County | Wendell Willkie+1,154 | 5,28455.9% | 4,13043.7% | 350.4% | 9,449 |
| Dallas County | Franklin D. Roosevelt+61 | 6,21849.2% | 6,27949.7% | 1311.0% | 12,628 |
| Davis County | Franklin D. Roosevelt+399 | 2,97546.7% | 3,37452.9% | 280.4% | 6,377 |
| Decatur County | Franklin D. Roosevelt+444 | 3,49446.9% | 3,93852.9% | 160.2% | 7,448 |
| Delaware County | Wendell Willkie+3,190 | 6,17567.3% | 2,98532.5% | 160.2% | 9,176 |
| Des Moines County | Wendell Willkie+4,410 | 10,98862.3% | 6,57837.3% | 590.3% | 17,625 |
| Dickinson County | Franklin D. Roosevelt+249 | 2,73647.6% | 2,98552.0% | 210.4% | 5,742 |
| Dubuque County | Wendell Willkie+785 | 14,59051.3% | 13,80548.5% | 460.2% | 28,441 |
| Emmet County | Franklin D. Roosevelt+44 | 3,05349.3% | 3,09750.0% | 470.8% | 6,197 |
| Fayette County | Wendell Willkie+2,171 | 8,23757.4% | 6,06642.3% | 390.3% | 14,342 |
| Floyd County | Wendell Willkie+1,662 | 5,82958.1% | 4,16741.5% | 350.3% | 10,031 |
| Franklin County | Wendell Willkie+83 | 3,62349.6% | 3,54048.4% | 1472.0% | 7,310 |
| Fremont County | Franklin D. Roosevelt+89 | 3,82549.3% | 3,91450.4% | 250.3% | 7,764 |
| Greene County | Wendell Willkie+354 | 3,92052.2% | 3,56647.5% | 200.3% | 7,506 |
| Grundy County | Wendell Willkie+1,163 | 3,90858.6% | 2,74541.1% | 210.3% | 6,674 |
| Guthrie County | Wendell Willkie+1,244 | 4,73357.3% | 3,48942.3% | 330.4% | 8,255 |
| Hamilton County | Franklin D. Roosevelt+1,096 | 4,18344.0% | 5,27955.6% | 390.4% | 9,501 |
| Hancock County | Wendell Willkie+118 | 3,63250.6% | 3,51449.0% | 270.4% | 7,173 |
| Hardin County | Wendell Willkie+928 | 5,69254.3% | 4,76445.4% | 350.3% | 10,491 |
| Harrison County | Wendell Willkie+777 | 6,09453.3% | 5,31746.5% | 170.1% | 11,428 |
| Henry County | Wendell Willkie+3,056 | 5,89367.4% | 2,83732.4% | 190.2% | 8,749 |
| Howard County | Wendell Willkie+39 | 3,71450.2% | 3,67549.6% | 160.2% | 7,405 |
| Humboldt County | Franklin D. Roosevelt+415 | 2,85346.4% | 3,26853.2% | 220.4% | 6,143 |
| Ida County | Wendell Willkie+860 | 3,16657.7% | 2,30642.0% | 150.3% | 5,487 |
| Iowa County | Wendell Willkie+1,047 | 4,69655.3% | 3,64943.0% | 1431.7% | 8,488 |
| Jackson County | Wendell Willkie+1,199 | 5,41756.1% | 4,21843.7% | 260.3% | 9,661 |
| Jasper County | Franklin D. Roosevelt+889 | 7,24046.9% | 8,12952.7% | 520.3% | 15,421 |
| Jefferson County | Wendell Willkie+1,489 | 4,89158.7% | 3,40240.8% | 430.5% | 8,336 |
| Johnson County | Franklin D. Roosevelt+1,811 | 7,20644.3% | 9,01755.4% | 550.3% | 16,278 |
| Jones County | Wendell Willkie+1,357 | 5,63056.7% | 4,27343.0% | 260.3% | 9,929 |
| Keokuk County | Wendell Willkie+842 | 5,39454.0% | 4,55245.6% | 420.4% | 9,988 |
| Kossuth County | Franklin D. Roosevelt+863 | 5,63946.4% | 6,50253.4% | 240.2% | 12,165 |
| Lee County | Wendell Willkie+1,499 | 10,61653.7% | 9,11746.1% | 330.2% | 19,766 |
| Linn County | Wendell Willkie+4,050 | 23,58154.5% | 19,53145.2% | 1230.3% | 43,235 |
| Louisa County | Wendell Willkie+1,083 | 3,33059.2% | 2,24739.9% | 500.9% | 5,627 |
| Lucas County | Wendell Willkie+551 | 3,80653.2% | 3,25545.5% | 881.2% | 7,149 |
| Lyon County | Wendell Willkie+1,232 | 3,88059.3% | 2,64840.5% | 120.2% | 6,540 |
| Madison County | Wendell Willkie+1,383 | 4,47758.9% | 3,09440.7% | 290.4% | 7,600 |
| Mahaska County | Wendell Willkie+366 | 6,12351.1% | 5,75748.1% | 970.8% | 11,977 |
| Marion County | Franklin D. Roosevelt+1,152 | 5,76345.2% | 6,91554.2% | 750.6% | 12,753 |
| Marshall County | Wendell Willkie+2,006 | 8,50356.4% | 6,49743.1% | 650.4% | 15,065 |
| Mills County | Wendell Willkie+1,011 | 3,87357.4% | 2,86242.4% | 140.2% | 6,749 |
| Mitchell County | Wendell Willkie+922 | 3,94756.5% | 3,02543.3% | 150.2% | 6,987 |
| Monona County | Franklin D. Roosevelt+591 | 4,19246.6% | 4,78353.2% | 150.2% | 8,990 |
| Monroe County | Franklin D. Roosevelt+724 | 3,27044.6% | 3,99454.4% | 721.0% | 7,336 |
| Montgomery County | Wendell Willkie+1,516 | 4,84859.0% | 3,33240.5% | 400.5% | 8,220 |
| Muscatine County | Wendell Willkie+2,718 | 8,54359.2% | 5,82540.4% | 530.4% | 14,421 |
| O'Brien County | Wendell Willkie+627 | 4,76053.3% | 4,13346.3% | 380.4% | 8,931 |
| Osceola County | Wendell Willkie+137 | 2,42551.1% | 2,28848.2% | 290.6% | 4,742 |
| Page County | Wendell Willkie+3,305 | 7,40764.0% | 4,10235.5% | 570.5% | 11,566 |
| Palo Alto County | Franklin D. Roosevelt+1,160 | 3,32242.5% | 4,48257.3% | 180.2% | 7,822 |
| Plymouth County | Wendell Willkie+3,894 | 7,72566.7% | 3,83133.1% | 230.2% | 11,579 |
| Pocahontas County | Franklin D. Roosevelt+1,133 | 2,98541.9% | 4,11857.8% | 180.3% | 7,121 |
| Polk County | Franklin D. Roosevelt+10,402 | 41,24544.3% | 51,64755.4% | 3010.3% | 93,193 |
| Pottawattamie County | Wendell Willkie+708 | 15,92951.1% | 15,22148.8% | 380.1% | 31,188 |
| Poweshiek County | Franklin D. Roosevelt+21 | 4,77349.7% | 4,79449.9% | 440.5% | 9,611 |
| Ringgold County | Wendell Willkie+1,133 | 3,50759.5% | 2,37440.3% | 130.2% | 5,894 |
| Sac County | Wendell Willkie+604 | 4,35853.7% | 3,75446.2% | 90.1% | 8,121 |
| Scott County | Franklin D. Roosevelt+2,492 | 18,50446.7% | 20,99653.0% | 1300.3% | 39,630 |
| Shelby County | Wendell Willkie+802 | 4,61354.5% | 3,81145.0% | 360.4% | 8,460 |
| Sioux County | Wendell Willkie+3,441 | 7,58564.6% | 4,14435.3% | 210.2% | 11,750 |
| Story County | Wendell Willkie+701 | 7,85352.1% | 7,15247.5% | 650.4% | 15,070 |
| Tama County | Franklin D. Roosevelt+131 | 5,86549.3% | 5,99650.4% | 320.3% | 11,893 |
| Taylor County | Wendell Willkie+1,444 | 4,42059.6% | 2,97640.1% | 250.3% | 7,421 |
| Union County | Wendell Willkie+2,192 | 5,42162.5% | 3,22937.3% | 180.2% | 8,668 |
| Van Buren County | Wendell Willkie+1,692 | 4,10862.7% | 2,41636.9% | 260.4% | 6,550 |
| Wapello County | Franklin D. Roosevelt+2,841 | 9,03943.0% | 11,88056.6% | 870.4% | 21,006 |
| Warren County | Wendell Willkie+1,160 | 5,01656.2% | 3,85643.2% | 510.6% | 8,923 |
| Washington County | Wendell Willkie+1,619 | 5,64958.1% | 4,03041.5% | 420.4% | 9,721 |
| Wayne County | Wendell Willkie+123 | 3,74850.6% | 3,62549.0% | 280.4% | 7,401 |
| Webster County | Franklin D. Roosevelt+3,148 | 7,58341.3% | 10,73158.4% | 520.3% | 18,366 |
| Winnebago County | Wendell Willkie+257 | 3,30851.8% | 3,05147.8% | 290.5% | 6,388 |
| Winneshiek County | Wendell Willkie+803 | 6,20853.3% | 5,40546.4% | 240.2% | 11,637 |
| Woodbury County | Franklin D. Roosevelt+1,625 | 22,83248.2% | 24,45751.6% | 890.2% | 47,378 |
| Worth County | Franklin D. Roosevelt+573 | 2,43444.6% | 3,00755.1% | 140.3% | 5,455 |
| Wright County | Franklin D. Roosevelt+428 | 4,44347.5% | 4,87152.1% | 360.4% | 9,350 |
Nominees: Franklin D. Roosevelt (D) · Wendell Willkie (R)
Iowa's presidential margins
1892–2024, the 1940 contest in context
| Year | Margin (D minus R) |
|---|---|
| 1892 | −5.3% |
| 1896 | −12.6% |
| 1900 | −18.6% |
| 1904 | −32.7% |
| 1908 | −15.0% |
| 1912 | +13.3% |
| 1916 | −11.4% |
| 1920 | −45.5% |
| 1924 | −38.6% |
| 1928 | −24.2% |
| 1932 | +17.7% |
| 1936 | +11.7% |
| 1940 | −4.4% |
| 1944 | −4.5% |
| 1948 | +2.7% |
| 1952 | −28.2% |
| 1956 | −18.4% |
| 1960 | −13.5% |
| 1964 | +24.0% |
| 1968 | −12.2% |
| 1972 | −17.1% |
| 1976 | −1.0% |
| 1980 | −12.7% |
| 1984 | −7.4% |
| 1988 | +10.2% |
| 1992 | +6.0% |
| 1996 | +10.3% |
| 2000 | +0.3% |
| 2004 | −0.7% |
| 2008 | +9.5% |
| 2012 | +5.8% |
| 2016 | −9.3% |
| 2020 | −8.2% |
| 2024 | −13.2% |
Source. Compiled historical county records — 1940 presidential returns · official county-level results. Real returns — nothing estimated.