Iowa — 1948 presidential election
Recent presidential results
Akashicstate1948 presidential electionIowa · PresidentTrumanD+2.7
How it voted
Share of the 1948 vote
| Harry S. Truman ✓Democratic | 50.3% | 522,380 |
|---|---|---|
| Thomas E. DeweyRepublican | 47.6% | 494,018 |
| OtherAll other candidates | 2.1% | 21,866 |
1948presidential margin
D+60R+60
99 counties, each filled by 1948 D-vs-R margin. Hover any county for its result.
Iowa cast 10 electoral votes this cycle.
County-level results (99 counties) — table
| County | Winner | Margin |
|---|---|---|
| Adair County, IA | Republican | R+5.6 |
| Adams County, IA | Republican | R+8.1 |
| Allamakee County, IA | Republican | R+16.9 |
| Appanoose County, IA | Democratic | D+9.9 |
| Audubon County, IA | Democratic | D+12.9 |
| Benton County, IA | Democratic | D+5.2 |
| Black Hawk County, IA | Democratic | D+9.8 |
| Boone County, IA | Democratic | D+13.3 |
| Bremer County, IA | Republican | R+4.5 |
| Buchanan County, IA | Republican | R+2.1 |
| Buena Vista County, IA | Democratic | D+4.5 |
| Butler County, IA | Republican | R+5.7 |
| Calhoun County, IA | Democratic | D+1.3 |
| Carroll County, IA | Democratic | D+17.7 |
| Cass County, IA | Republican | R+20.3 |
| Cedar County, IA | Republican | R+14.2 |
| Cerro Gordo County, IA | Democratic | D+9.6 |
| Cherokee County, IA | Democratic | D+5.9 |
| Chickasaw County, IA | Democratic | D+8.2 |
| Clarke County, IA | Republican | R+2.1 |
| Clay County, IA | Democratic | D+8.8 |
| Clayton County, IA | Republican | R+2.9 |
| Clinton County, IA | Republican | R+7.1 |
| Crawford County, IA | Democratic | D+9.6 |
| Dallas County, IA | Democratic | D+7.9 |
| Davis County, IA | Democratic | D+13.3 |
| Decatur County, IA | Democratic | D+10.8 |
| Delaware County, IA | Republican | R+22.4 |
| Des Moines County, IA | Democratic | D+7.0 |
| Dickinson County, IA | Democratic | D+0.4 |
| Dubuque County, IA | Democratic | D+20.9 |
| Emmet County, IA | Democratic | D+5.4 |
| Fayette County, IA | Republican | R+8.4 |
| Floyd County, IA | Republican | R+11.3 |
| Franklin County, IA | Democratic | D+2.6 |
| Fremont County, IA | Republican | R+1.1 |
| Greene County, IA | Republican | R+1.8 |
| Grundy County, IA | Republican | R+14.3 |
| Guthrie County, IA | Democratic | D+0.04 |
| Hamilton County, IA | Democratic | D+1.1 |
| Hancock County, IA | Democratic | D+4.9 |
| Hardin County, IA | Republican | R+6.0 |
| Harrison County, IA | Democratic | D+3.0 |
| Henry County, IA | Republican | R+20.2 |
| Howard County, IA | Democratic | D+12.3 |
| Humboldt County, IA | Democratic | D+6.6 |
| Ida County, IA | Democratic | D+2.3 |
| Iowa County, IA | Republican | R+9.0 |
| Jackson County, IA | Republican | R+4.8 |
| Jasper County, IA | Democratic | D+7.6 |
| Jefferson County, IA | Republican | R+12.3 |
| Johnson County, IA | Democratic | D+9.0 |
| Jones County, IA | Republican | R+4.5 |
| Keokuk County, IA | Republican | R+1.0 |
| Kossuth County, IA | Democratic | D+17.9 |
| Lee County, IA | Democratic | D+8.1 |
| Linn County, IA | Democratic | D+0.3 |
| Louisa County, IA | Republican | R+10.7 |
| Lucas County, IA | Democratic | D+0.7 |
| Lyon County, IA | Republican | R+6.9 |
| Madison County, IA | Republican | R+6.2 |
| Mahaska County, IA | Democratic | D+1.0 |
| Marion County, IA | Democratic | D+18.3 |
| Marshall County, IA | Republican | R+8.5 |
| Mills County, IA | Republican | R+15.0 |
| Mitchell County, IA | Republican | R+2.4 |
| Monona County, IA | Democratic | D+12.5 |
| Monroe County, IA | Democratic | D+18.1 |
| Montgomery County, IA | Republican | R+19.3 |
| Muscatine County, IA | Republican | R+4.6 |
| O'Brien County, IA | Republican | R+3.8 |
| Osceola County, IA | Democratic | D+8.9 |
| Page County, IA | Republican | R+22.1 |
| Palo Alto County, IA | Democratic | D+19.1 |
| Plymouth County, IA | Republican | R+7.0 |
| Pocahontas County, IA | Democratic | D+18.2 |
| Polk County, IA | Democratic | D+14.2 |
| Pottawattamie County, IA | Republican | R+4.0 |
| Poweshiek County, IA | Democratic | D+5.2 |
| Ringgold County, IA | Republican | R+12.7 |
| Sac County, IA | Democratic | D+2.6 |
| Scott County, IA | Republican | R+0.5 |
| Shelby County, IA | Democratic | D+2.9 |
| Sioux County, IA | Republican | R+15.9 |
| Story County, IA | Republican | R+14.1 |
| Tama County, IA | Democratic | D+3.5 |
| Taylor County, IA | Republican | R+14.8 |
| Union County, IA | Republican | R+12.4 |
| Van Buren County, IA | Republican | R+16.7 |
| Wapello County, IA | Democratic | D+15.6 |
| Warren County, IA | Republican | R+5.2 |
| Washington County, IA | Republican | R+14.5 |
| Wayne County, IA | Democratic | D+9.4 |
| Webster County, IA | Democratic | D+15.0 |
| Winnebago County, IA | Republican | R+0.2 |
| Winneshiek County, IA | Democratic | D+3.2 |
| Woodbury County, IA | Democratic | D+13.8 |
| Worth County, IA | Democratic | D+16.1 |
| Wright County, IA | Democratic | D+0.7 |
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 | Thomas E. Dewey+312 | 2,56746.5% | 2,87952.1% | 771.4% | 5,523 |
| Adams County | Thomas E. Dewey+325 | 1,81745.3% | 2,14253.4% | 531.3% | 4,012 |
| Allamakee County | Thomas E. Dewey+1,302 | 3,17241.1% | 4,47457.9% | 801.0% | 7,726 |
| Appanoose County | Harry S. Truman+920 | 4,99853.8% | 4,07843.9% | 2202.4% | 9,296 |
| Audubon County | Harry S. Truman+663 | 2,84055.1% | 2,17742.2% | 1362.6% | 5,153 |
| Benton County | Harry S. Truman+439 | 4,20950.3% | 3,77045.1% | 3884.6% | 8,367 |
| Black Hawk County | Harry S. Truman+3,562 | 19,60354.1% | 16,04144.3% | 5861.6% | 36,230 |
| Boone County | Harry S. Truman+1,358 | 5,54154.2% | 4,18340.9% | 4984.9% | 10,222 |
| Bremer County | Thomas E. Dewey+335 | 3,50247.1% | 3,83751.6% | 941.3% | 7,433 |
| Buchanan County | Thomas E. Dewey+183 | 4,12748.4% | 4,31050.6% | 861.0% | 8,523 |
| Buena Vista County | Harry S. Truman+381 | 4,34051.1% | 3,95946.6% | 1942.3% | 8,493 |
| Butler County | Thomas E. Dewey+372 | 3,00846.2% | 3,38051.9% | 1251.9% | 6,513 |
| Calhoun County | Harry S. Truman+81 | 3,16449.5% | 3,08348.2% | 1512.4% | 6,398 |
| Carroll County | Harry S. Truman+1,737 | 5,71158.4% | 3,97440.6% | 1011.0% | 9,786 |
| Cass County | Thomas E. Dewey+1,734 | 3,37239.4% | 5,10659.7% | 810.9% | 8,559 |
| Cedar County | Thomas E. Dewey+999 | 2,95842.2% | 3,95756.4% | 1011.4% | 7,016 |
| Cerro Gordo County | Harry S. Truman+1,704 | 9,54454.0% | 7,84044.3% | 2981.7% | 17,682 |
| Cherokee County | Harry S. Truman+421 | 3,73952.3% | 3,31846.4% | 871.2% | 7,144 |
| Chickasaw County | Harry S. Truman+622 | 4,07153.6% | 3,44945.4% | 690.9% | 7,589 |
| Clarke County | Thomas E. Dewey+94 | 2,10148.0% | 2,19550.1% | 831.9% | 4,379 |
| Clay County | Harry S. Truman+613 | 3,64952.4% | 3,03643.6% | 2764.0% | 6,961 |
| Clayton County | Thomas E. Dewey+294 | 4,85748.0% | 5,15150.9% | 1031.0% | 10,111 |
| Clinton County | Thomas E. Dewey+1,325 | 8,53445.7% | 9,85952.8% | 2721.5% | 18,665 |
| Crawford County | Harry S. Truman+716 | 3,98353.2% | 3,26743.6% | 2353.1% | 7,485 |
| Dallas County | Harry S. Truman+851 | 5,66152.3% | 4,81044.5% | 3483.2% | 10,819 |
| Davis County | Harry S. Truman+706 | 2,98256.2% | 2,27642.9% | 470.9% | 5,305 |
| Decatur County | Harry S. Truman+625 | 3,17254.7% | 2,54743.9% | 841.4% | 5,803 |
| Delaware County | Thomas E. Dewey+1,679 | 2,87638.4% | 4,55560.7% | 670.9% | 7,498 |
| Des Moines County | Harry S. Truman+1,171 | 8,79252.6% | 7,62145.6% | 3161.9% | 16,729 |
| Dickinson County | Harry S. Truman+20 | 2,32448.8% | 2,30448.3% | 1382.9% | 4,766 |
| Dubuque County | Harry S. Truman+5,410 | 15,52159.9% | 10,11139.0% | 2811.1% | 25,913 |
| Emmet County | Harry S. Truman+288 | 2,75251.8% | 2,46446.4% | 971.8% | 5,313 |
| Fayette County | Thomas E. Dewey+993 | 5,30345.1% | 6,29653.5% | 1611.4% | 11,760 |
| Floyd County | Thomas E. Dewey+956 | 3,68843.4% | 4,64454.7% | 1651.9% | 8,497 |
| Franklin County | Harry S. Truman+155 | 2,87147.7% | 2,71645.1% | 4347.2% | 6,021 |
| Fremont County | Thomas E. Dewey+61 | 2,63749.0% | 2,69850.2% | 430.8% | 5,378 |
| Greene County | Thomas E. Dewey+113 | 2,94646.8% | 3,05948.6% | 2854.5% | 6,290 |
| Grundy County | Thomas E. Dewey+810 | 2,34441.5% | 3,15455.9% | 1492.6% | 5,647 |
| Guthrie County | Harry S. Truman+3 | 3,39249.2% | 3,38949.2% | 1101.6% | 6,891 |
| Hamilton County | Harry S. Truman+78 | 3,61349.2% | 3,53548.1% | 1972.7% | 7,345 |
| Hancock County | Harry S. Truman+294 | 3,09651.2% | 2,80246.3% | 1532.5% | 6,051 |
| Hardin County | Thomas E. Dewey+530 | 4,02345.4% | 4,55351.4% | 2783.1% | 8,854 |
| Harrison County | Harry S. Truman+267 | 4,60851.1% | 4,34148.1% | 670.7% | 9,016 |
| Henry County | Thomas E. Dewey+1,578 | 3,04239.0% | 4,62059.2% | 1431.8% | 7,805 |
| Howard County | Harry S. Truman+748 | 3,37855.5% | 2,63043.2% | 821.3% | 6,090 |
| Humboldt County | Harry S. Truman+357 | 2,85552.6% | 2,49846.0% | 791.5% | 5,432 |
| Ida County | Harry S. Truman+108 | 2,36550.3% | 2,25748.0% | 761.6% | 4,698 |
| Iowa County | Thomas E. Dewey+629 | 3,03043.4% | 3,65952.4% | 2894.1% | 6,978 |
| Jackson County | Thomas E. Dewey+334 | 3,26346.6% | 3,59751.3% | 1452.1% | 7,005 |
| Jasper County | Harry S. Truman+974 | 6,68452.3% | 5,71044.7% | 3923.1% | 12,786 |
| Jefferson County | Thomas E. Dewey+873 | 3,03342.8% | 3,90655.1% | 1492.1% | 7,088 |
| Johnson County | Harry S. Truman+1,472 | 8,61152.8% | 7,13943.8% | 5533.4% | 16,303 |
| Jones County | Thomas E. Dewey+375 | 3,91547.0% | 4,29051.6% | 1171.4% | 8,322 |
| Keokuk County | Thomas E. Dewey+83 | 4,11848.6% | 4,20149.6% | 1561.8% | 8,475 |
| Kossuth County | Harry S. Truman+1,853 | 6,03958.3% | 4,18640.4% | 1281.2% | 10,353 |
| Lee County | Harry S. Truman+1,400 | 9,20153.5% | 7,80145.3% | 2101.2% | 17,212 |
| Linn County | Harry S. Truman+114 | 20,99548.7% | 20,88148.5% | 1,2222.8% | 43,098 |
| Louisa County | Thomas E. Dewey+475 | 1,94543.9% | 2,42054.6% | 641.4% | 4,429 |
| Lucas County | Harry S. Truman+41 | 2,69749.3% | 2,65648.5% | 1222.2% | 5,475 |
| Lyon County | Thomas E. Dewey+326 | 2,17445.9% | 2,50052.7% | 661.4% | 4,740 |
| Madison County | Thomas E. Dewey+380 | 2,82746.2% | 3,20752.4% | 891.5% | 6,123 |
| Mahaska County | Harry S. Truman+89 | 4,32747.9% | 4,23846.9% | 4655.1% | 9,030 |
| Marion County | Harry S. Truman+1,988 | 6,30058.0% | 4,31239.7% | 2582.4% | 10,870 |
| Marshall County | Thomas E. Dewey+1,096 | 5,60243.7% | 6,69852.2% | 5334.2% | 12,833 |
| Mills County | Thomas E. Dewey+766 | 2,15542.2% | 2,92157.2% | 310.6% | 5,107 |
| Mitchell County | Thomas E. Dewey+148 | 2,87347.0% | 3,02149.4% | 2253.7% | 6,119 |
| Monona County | Harry S. Truman+919 | 4,09855.8% | 3,17943.3% | 690.9% | 7,346 |
| Monroe County | Harry S. Truman+1,074 | 3,44558.1% | 2,37140.0% | 1101.9% | 5,926 |
| Montgomery County | Thomas E. Dewey+1,333 | 2,75139.8% | 4,08459.1% | 751.1% | 6,910 |
| Muscatine County | Thomas E. Dewey+537 | 5,46647.1% | 6,00351.7% | 1461.3% | 11,615 |
| O'Brien County | Thomas E. Dewey+276 | 3,42146.7% | 3,69750.5% | 2082.8% | 7,326 |
| Osceola County | Harry S. Truman+351 | 2,12353.9% | 1,77245.0% | 441.1% | 3,939 |
| Page County | Thomas E. Dewey+2,071 | 3,56738.1% | 5,63860.1% | 1691.8% | 9,374 |
| Palo Alto County | Harry S. Truman+1,264 | 3,85858.4% | 2,59439.3% | 1492.3% | 6,601 |
| Plymouth County | Thomas E. Dewey+663 | 4,33946.1% | 5,00253.1% | 750.8% | 9,416 |
| Pocahontas County | Harry S. Truman+1,103 | 3,50057.8% | 2,39739.6% | 1542.5% | 6,051 |
| Polk County | Harry S. Truman+11,547 | 45,28955.7% | 33,74241.5% | 2,3482.9% | 81,379 |
| Pottawattamie County | Thomas E. Dewey+954 | 11,43047.4% | 12,38451.4% | 2811.2% | 24,095 |
| Poweshiek County | Harry S. Truman+436 | 4,32451.6% | 3,88846.4% | 1732.1% | 8,385 |
| Ringgold County | Thomas E. Dewey+565 | 1,92243.1% | 2,48755.8% | 501.1% | 4,459 |
| Sac County | Harry S. Truman+194 | 3,69950.2% | 3,50547.6% | 1592.2% | 7,363 |
| Scott County | Thomas E. Dewey+181 | 16,66148.9% | 16,84249.4% | 5781.7% | 34,081 |
| Shelby County | Harry S. Truman+198 | 3,49950.5% | 3,30147.6% | 1351.9% | 6,935 |
| Sioux County | Thomas E. Dewey+1,555 | 4,04241.2% | 5,59757.1% | 1621.7% | 9,801 |
| Story County | Thomas E. Dewey+2,155 | 6,15240.3% | 8,30754.5% | 7925.2% | 15,251 |
| Tama County | Harry S. Truman+352 | 5,11551.0% | 4,76347.5% | 1501.5% | 10,028 |
| Taylor County | Thomas E. Dewey+842 | 2,40242.2% | 3,24456.9% | 520.9% | 5,698 |
| Union County | Thomas E. Dewey+920 | 3,21843.4% | 4,13855.8% | 580.8% | 7,414 |
| Van Buren County | Thomas E. Dewey+785 | 1,91740.9% | 2,70257.6% | 691.5% | 4,688 |
| Wapello County | Harry S. Truman+2,966 | 10,84157.1% | 7,87541.5% | 2601.4% | 18,976 |
| Warren County | Thomas E. Dewey+395 | 3,48145.8% | 3,87651.0% | 2483.3% | 7,605 |
| Washington County | Thomas E. Dewey+1,195 | 3,48542.3% | 4,68056.8% | 801.0% | 8,245 |
| Wayne County | Harry S. Truman+576 | 3,31454.1% | 2,73844.7% | 711.2% | 6,123 |
| Webster County | Harry S. Truman+2,557 | 9,50855.7% | 6,95140.7% | 6073.6% | 17,066 |
| Winnebago County | Thomas E. Dewey+10 | 2,62648.2% | 2,63648.4% | 1893.5% | 5,451 |
| Winneshiek County | Harry S. Truman+311 | 4,90550.8% | 4,59447.5% | 1641.7% | 9,663 |
| Woodbury County | Harry S. Truman+5,401 | 22,05656.4% | 16,65542.6% | 3731.0% | 39,084 |
| Worth County | Harry S. Truman+745 | 2,62356.6% | 1,87840.5% | 1362.9% | 4,637 |
| Wright County | Harry S. Truman+56 | 3,86649.6% | 3,81048.8% | 1241.6% | 7,800 |
Nominees: Harry S. Truman (D) · Thomas E. Dewey (R) · Strom Thurmond (States' Rights Democratic)
Iowa's presidential margins
1892–2024, the 1948 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 — 1948 presidential returns · official county-level results. Real returns — nothing estimated.