| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 3,749 | 15,352 | 19,199 | |
| 2020 | R | 3,658 | 13,589 | 17,399 | |
| 2016 | R | 2,867 | 11,014 | 14,275 | |
| 2012 | R | 3,615 | 9,811 | 13,648 | |
| 2008 | R | 4,052 | 9,850 | 14,113 | |
| 2004 | R | 3,868 | 8,467 | 12,420 | |
| 2000 | R | 4,112 | 5,841 | 10,116 | |
| 1996 | D | 4,298 | 4,130 | 9,550 | |
| 1992 | D | 4,872 | 4,158 | 10,668 | |
| 1988 | R | 2,977 | 5,454 | 8,461 | |
| 1984 | R | 3,262 | 5,435 | 8,697 | |
| 1980 | D | 5,421 | 2,949 | 8,562 | |
| 1976 | D | 6,115 | 1,944 | 8,059 | |
| 1972 | R | 1,317 | 4,929 | 6,246 | |
| 1968 | D | 2,007 | 1,729 | 7,976 | |
| 1964 | D | 4,555 | 3,282 | 7,840 | |
| 1960 | D | 4,351 | 1,746 | 6,097 | |
| 1956 | D | 4,502 | 2,098 | 6,600 | |
| 1952 | D | 4,447 | 1,299 | 5,746 | |
| 1948 | D | 2,918 | 491 | 3,706 | |
| 1944 | D | 2,698 | 463 | 3,161 | |
| 1940 | D | 2,693 | 401 | 3,104 | |
| 1936 | D | 2,754 | 389 | 3,147 | |
| 1932 | D | 2,170 | 211 | 2,381 | |
| 1928 | R | 886 | 1,462 | 2,348 | |
| 1924 | D | 803 | 481 | 1,441 | |
| 1920 | R | 658 | 1,004 | 1,662 | |
| 1916 | D | 1,172 | 0 | 1,885 | |
| 1912 | D | 706 | 36 | 1,286 | |
| 1908 | R | 492 | 901 | 1,480 | |
| 1904 | R | 653 | 689 | 1,516 | |
| 1900 | R | 490 | 1,019 | 1,547 | |
| 1896 | R | 567 | 810 | 1,425 | |
| 1892 | D | 748 | 391 | 1,554 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Polk County, a rural Piedmont community of roughly 38,000, recorded an R+60.5 presidential margin in 2024, placing it among the most one-sided counties in a state whose statewide results have grown increasingly competitive.
The unraveling was not abrupt. The Democratic margin in Polk County peaked at eighty-two points in 1932; it narrowed steadily over the late twentieth century. The 2000 election delivered the county to the Republican party for the first time in many years, by a margin of seventeen points. By 2024, the margin had widened further.
The economic and demographic context is severe. Polk County's median household income of $58,515 is among the lowest of any county in the United States; 16% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Heard County and La Paz County.
