| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 1,429 | 4,312 | 5,879 | |
| 2020 | R | 1,516 | 4,465 | 6,111 | |
| 2016 | R | 1,204 | 4,003 | 5,670 | |
| 2012 | R | 1,385 | 3,889 | 5,409 | |
| 2008 | R | 1,801 | 4,159 | 6,059 | |
| 2004 | R | 1,536 | 4,516 | 6,159 | |
| 2000 | R | 1,475 | 4,156 | 5,903 | |
| 1996 | R | 1,673 | 4,173 | 6,389 | |
| 1992 | R | 1,627 | 3,142 | 6,351 | |
| 1988 | R | 2,024 | 3,685 | 5,850 | |
| 1984 | R | 1,632 | 4,407 | 6,116 | |
| 1980 | R | 1,569 | 3,960 | 6,150 | |
| 1976 | R | 3,004 | 3,226 | 6,360 | |
| 1972 | R | 1,478 | 4,373 | 6,059 | |
| 1968 | R | 1,494 | 4,287 | 6,092 | |
| 1964 | R | 2,792 | 3,481 | 6,341 | |
| 1960 | R | 1,904 | 5,250 | 7,172 | |
| 1956 | R | 1,644 | 5,318 | 6,998 | |
| 1952 | R | 1,361 | 6,228 | 7,767 | |
| 1948 | R | 2,421 | 4,724 | 7,285 | |
| 1944 | R | 1,925 | 5,219 | 7,185 | |
| 1940 | R | 2,724 | 5,764 | 8,547 | |
| 1936 | D | 4,207 | 4,185 | 8,426 | |
| 1932 | D | 4,366 | 3,220 | 7,715 | |
| 1928 | R | 1,938 | 5,446 | 7,410 | |
| 1924 | R | 1,520 | 4,008 | 7,109 | |
| 1920 | R | 1,713 | 3,840 | 5,834 | |
| 1916 | R | 2,790 | 3,453 | 6,622 | |
| 1912 | D | 1,732 | 863 | 4,319 | |
| 1908 | R | 1,747 | 2,546 | 4,432 | |
| 1904 | R | 928 | 2,705 | 3,799 | |
| 1900 | R | 1,729 | 2,623 | 4,396 | |
| 1896 | R | 1,699 | 2,285 | 4,037 | |
| 1892 | R | 0 | 1,682 | 3,979 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Marion County's R+49.1 margin in 2024 reflects a largely rural, agricultural electorate that has swung decisively toward Republican presidential candidates for decades, leaving little competitive ground at the top of the ticket.
The Republican margin in Marion County reached its widest at sixty-three points in 1952. The margin in 2024 was forty-nine points, in line with the county's deep historical pattern.
Marion County's loyalty is rooted in its place. Median household income of $64,695, a 93% non-Hispanic-white share, and a population of 11,754 together describe a community whose political habits are deeply settled. The county's voting pattern over the last decade is most similar to that of Garfield County and Hayes County.
