Iowa 2016 vs 2020: county swing
69 of 99 counties moved toward the Republican ticket; 0 changed hands.
| County | 2016 | 2020 | Swing | Votes 2016 | Votes 2020 |
|---|---|---|---|---|---|
| Decatur County | R+29.3 | R+39.3 | R+10.0 | 3,734 | 3,801 |
| Chickasaw County | R+23.0 | R+31.4 | R+8.4 | 6,435 | 6,617 |
| Taylor County | R+44.7 | R+53.0 | R+8.3 | 3,029 | 3,242 |
| Clarke County | R+28.0 | R+36.0 | R+8.0 | 4,454 | 4,661 |
| Jackson County | R+19.3 | R+26.2 | R+6.9 | 10,310 | 11,118 |
| Poweshiek County | R+6.5 | R+13.4 | R+6.9 | 9,833 | 10,124 |
| Ringgold County | R+39.6 | R+46.5 | R+6.9 | 2,707 | 2,708 |
| Howard County | R+20.5 | R+27.3 | R+6.8 | 4,559 | 4,952 |
| Adair County | R+34.9 | R+41.2 | R+6.3 | 3,811 | 4,172 |
| Carroll County | R+31.6 | R+37.8 | R+6.2 | 10,544 | 11,306 |
| Clayton County | R+22.7 | R+28.8 | R+6.1 | 9,129 | 9,581 |
| Wayne County | R+45.9 | R+51.9 | R+6.0 | 2,940 | 3,103 |
| Buchanan County | R+15.0 | R+20.9 | R+5.9 | 10,252 | 10,764 |
| Lucas County | R+37.6 | R+43.3 | R+5.7 | 4,354 | 4,622 |
| Delaware County | R+29.6 | R+35.2 | R+5.6 | 9,241 | 9,981 |
| Greene County | R+23.4 | R+28.8 | R+5.4 | 4,821 | 5,051 |
| Monroe County | R+41.0 | R+46.4 | R+5.4 | 3,865 | 4,085 |
| Clinton County | R+5.1 | R+10.3 | R+5.2 | 23,067 | 24,638 |
| Van Buren County | R+47.3 | R+52.5 | R+5.2 | 3,561 | 3,780 |
| Allamakee County | R+24.1 | R+29.2 | R+5.1 | 6,923 | 7,413 |
| Audubon County | R+30.9 | R+35.8 | R+4.9 | 3,412 | 3,416 |
| Louisa County | R+28.4 | R+33.3 | R+4.9 | 5,008 | 5,326 |
| Pocahontas County | R+45.0 | R+49.6 | R+4.6 | 3,865 | 3,817 |
| Floyd County | R+14.9 | R+19.4 | R+4.5 | 8,060 | 8,017 |
| Davis County | R+44.9 | R+49.3 | R+4.4 | 3,882 | 4,099 |
| Winneshiek County | R+0.8 | R+5.1 | R+4.3 | 11,362 | 12,036 |
| Adams County | R+39.4 | R+43.6 | R+4.2 | 2,106 | 2,155 |
| Appanoose County | R+36.1 | R+40.3 | R+4.2 | 6,136 | 6,506 |
| Union County | R+27.4 | R+31.6 | R+4.2 | 5,832 | 6,171 |
| Hamilton County | R+22.6 | R+26.7 | R+4.1 | 7,694 | 7,917 |
| Worth County | R+21.7 | R+25.8 | R+4.1 | 4,257 | 4,414 |
| Keokuk County | R+41.1 | R+45.1 | R+4.0 | 4,985 | 5,291 |
| Mitchell County | R+24.0 | R+27.9 | R+3.9 | 5,417 | 5,815 |
| Fayette County | R+19.3 | R+22.7 | R+3.4 | 9,975 | 10,157 |
| Jasper County | R+18.2 | R+21.6 | R+3.4 | 19,034 | 20,143 |
| Hancock County | R+40.7 | R+44.0 | R+3.3 | 5,871 | 6,161 |
| Lee County | R+16.0 | R+19.3 | R+3.3 | 16,151 | 16,699 |
| Madison County | R+31.1 | R+34.4 | R+3.3 | 8,636 | 9,806 |
| Kossuth County | R+36.2 | R+39.4 | R+3.2 | 8,607 | 9,077 |
| Hardin County | R+28.9 | R+32.0 | R+3.1 | 8,533 | 8,975 |
| Marion County | R+30.7 | R+33.8 | R+3.1 | 17,816 | 19,173 |
| Wapello County | R+20.6 | R+23.6 | R+3.0 | 15,149 | 15,613 |
| Guthrie County | R+33.0 | R+35.9 | R+2.9 | 5,750 | 6,363 |
| Webster County | R+21.5 | R+24.3 | R+2.8 | 17,430 | 17,790 |
| Wright County | R+31.6 | R+34.3 | R+2.7 | 6,026 | 6,242 |
| Bremer County | R+13.6 | R+16.1 | R+2.5 | 13,538 | 14,516 |
| Jones County | R+19.0 | R+21.5 | R+2.5 | 10,133 | 10,965 |
| Calhoun County | R+40.1 | R+42.3 | R+2.2 | 5,159 | 5,249 |
| Fremont County | R+40.2 | R+42.4 | R+2.2 | 3,595 | 3,851 |
| Mahaska County | R+45.3 | R+47.5 | R+2.2 | 10,632 | 11,381 |
| Boone County | R+13.7 | R+15.6 | R+1.9 | 14,196 | 15,306 |
| Benton County | R+25.7 | R+27.5 | R+1.8 | 13,844 | 14,622 |
| Butler County | R+36.8 | R+38.6 | R+1.8 | 7,513 | 8,084 |
| Henry County | R+30.6 | R+32.4 | R+1.8 | 9,404 | 9,964 |
| Sac County | R+46.6 | R+48.4 | R+1.8 | 5,212 | 5,527 |
| Dubuque County | R+1.2 | R+2.9 | R+1.7 | 49,721 | 53,782 |
| Des Moines County | R+6.9 | R+8.5 | R+1.6 | 19,103 | 19,906 |
| Palo Alto County | R+35.8 | R+37.4 | R+1.6 | 4,703 | 4,950 |
| Franklin County | R+33.6 | R+35.0 | R+1.4 | 4,968 | 5,119 |
| Iowa County | R+23.9 | R+25.3 | R+1.4 | 8,904 | 9,716 |
| Osceola County | R+61.6 | R+62.9 | R+1.3 | 3,213 | 3,323 |
| Harrison County | R+37.2 | R+38.4 | R+1.2 | 7,465 | 8,144 |
| Buena Vista County | R+24.7 | R+25.7 | R+1.0 | 8,278 | 8,149 |
| Jefferson County | R+0.5 | R+1.4 | R+0.9 | 8,156 | 8,926 |
| Muscatine County | R+6.2 | R+7.1 | R+0.9 | 19,434 | 20,629 |
| Lyon County | R+67.0 | R+67.7 | R+0.7 | 6,377 | 6,852 |
| Warren County | R+16.2 | R+16.8 | R+0.6 | 27,300 | 30,953 |
| Washington County | R+20.4 | R+20.6 | R+0.2 | 10,929 | 11,745 |
| Winnebago County | R+26.2 | R+26.4 | R+0.2 | 5,787 | 5,951 |
| Ida County | R+51.6 | R+51.0 | D+0.6 | 3,612 | 3,844 |
| Marshall County | R+8.3 | R+7.7 | D+0.6 | 17,980 | 18,097 |
| Cedar County | R+17.8 | R+17.1 | D+0.7 | 9,541 | 10,680 |
| Humboldt County | R+45.5 | R+44.7 | D+0.8 | 5,087 | 5,321 |
| Page County | R+43.8 | R+43.0 | D+0.8 | 7,044 | 7,519 |
| Cherokee County | R+40.2 | R+39.3 | D+0.9 | 6,258 | 6,503 |
| Crawford County | R+37.9 | R+36.8 | D+1.1 | 6,935 | 7,146 |
| Emmet County | R+37.1 | R+36.0 | D+1.1 | 4,753 | 4,850 |
| Tama County | R+20.3 | R+19.2 | D+1.1 | 8,752 | 9,026 |
| Cass County | R+39.4 | R+38.1 | D+1.3 | 7,125 | 7,266 |
| Mills County | R+38.7 | R+37.4 | D+1.3 | 7,698 | 8,237 |
| Cerro Gordo County | R+7.7 | R+6.3 | D+1.4 | 22,965 | 23,744 |
| Grundy County | R+38.9 | R+37.5 | D+1.4 | 6,872 | 7,260 |
| Black Hawk County | D+7.3 | D+9.1 | D+1.8 | 64,405 | 66,420 |
| Monona County | R+40.9 | R+39.1 | D+1.8 | 4,572 | 4,714 |
| Sioux County | R+68.7 | R+66.8 | D+1.9 | 18,194 | 18,956 |
| Scott County | D+1.5 | D+3.5 | D+2.0 | 86,220 | 92,324 |
| Shelby County | R+42.4 | R+40.4 | D+2.0 | 6,370 | 6,781 |
| Dickinson County | R+35.7 | R+33.6 | D+2.1 | 10,354 | 11,230 |
| Plymouth County | R+51.5 | R+49.4 | D+2.1 | 13,190 | 14,165 |
| Montgomery County | R+42.0 | R+39.0 | D+3.0 | 5,044 | 5,320 |
| O'Brien County | R+59.9 | R+56.9 | D+3.0 | 7,406 | 7,541 |
| Clay County | R+42.1 | R+38.9 | D+3.2 | 8,617 | 8,948 |
| Woodbury County | R+19.5 | R+15.6 | D+3.9 | 43,718 | 45,172 |
| Polk County | D+11.3 | D+15.3 | D+4.0 | 231,555 | 257,991 |
| Pottawattamie County | R+21.3 | R+16.8 | D+4.5 | 42,680 | 45,639 |
| Linn County | D+9.0 | D+13.8 | D+4.8 | 117,098 | 127,078 |
| Story County | D+12.3 | D+17.4 | D+5.1 | 50,667 | 50,837 |
| Johnson County | D+37.8 | D+43.4 | D+5.6 | 76,940 | 83,570 |
| Dallas County | R+9.6 | R+2.0 | D+7.6 | 38,252 | 55,847 |
Official results As published by The American Presidency Project (UC Santa Barbara) and the state documents it links. How we use this data