| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 7,902 | 19,219 | 27,470 | |
| 2020 | R | 8,269 | 19,023 | 27,818 | |
| 2016 | R | 7,928 | 16,961 | 26,885 | |
| 2012 | R | 12,504 | 14,265 | 27,622 | |
| 2008 | R | 12,870 | 15,454 | 29,092 | |
| 2004 | R | 11,930 | 17,171 | 29,258 | |
| 2000 | R | 10,370 | 13,617 | 24,815 | |
| 1996 | R | 10,482 | 11,112 | 24,674 | |
| 1992 | R | 9,444 | 11,675 | 27,715 | |
| 1988 | R | 9,596 | 14,864 | 24,718 | |
| 1984 | R | 8,827 | 17,392 | 26,443 | |
| 1980 | R | 9,419 | 14,605 | 25,631 | |
| 1976 | R | 10,962 | 13,141 | 24,620 | |
| 1972 | R | 7,970 | 17,197 | 25,659 | |
| 1968 | R | 8,611 | 12,887 | 24,271 | |
| 1964 | D | 14,400 | 10,050 | 24,450 | |
| 1960 | R | 9,598 | 15,210 | 24,808 | |
| 1956 | R | 7,425 | 15,125 | 22,550 | |
| 1952 | R | 8,851 | 14,583 | 23,434 | |
| 1948 | R | 8,223 | 10,333 | 18,606 | |
| 1944 | R | 8,775 | 11,925 | 20,700 | |
| 1940 | R | 10,462 | 11,817 | 22,279 | |
| 1936 | D | 11,881 | 9,070 | 21,427 | |
| 1932 | D | 10,354 | 8,569 | 19,429 | |
| 1928 | R | 5,468 | 13,398 | 19,060 | |
| 1924 | R | 5,234 | 9,161 | 16,901 | |
| 1920 | R | 8,065 | 11,320 | 19,541 | |
| 1916 | D | 5,273 | 4,264 | 9,850 | |
| 1912 | D | 4,024 | 3,218 | 8,928 | |
| 1908 | D | 4,657 | 4,175 | 9,053 | |
| 1904 | R | 3,581 | 4,473 | 8,311 | |
| 1900 | D | 4,141 | 3,770 | 8,016 | |
| 1896 | D | 4,016 | 3,426 | 7,547 | |
| 1892 | D | 3,282 | 2,477 | 6,052 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Marion County, anchored by the small city of Marion, has shifted dramatically from a competitive industrial county to a reliably lopsided one, posting an R+41.4 margin in 2024 as rural and working-class realignment reshaped its electorate.
The Democratic margin in Marion County peaked at eighteen points in 1964. By 1968 the county had flipped, voting Republican for the first time in many years. The 2024 margin was forty-one points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Marion County's median household income of $59,371 sits well below state and national norms, and 17% of residents live below the federal poverty line. The shift here is part of a broader realignment of working-class places across the country. The county's voting pattern over the last decade is most similar to that of Muskingum County and Newton County.