| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 21,847 | 40,403 | 63,206 | |
| 2020 | R | 24,076 | 39,032 | 64,212 | |
| 2016 | R | 23,328 | 35,205 | 62,756 | |
| 2012 | R | 31,297 | 31,820 | 65,104 | |
| 2008 | R | 31,958 | 33,634 | 66,987 | |
| 2004 | R | 33,535 | 34,941 | 68,807 | |
| 2000 | D | 27,984 | 27,660 | 57,559 | |
| 1996 | D | 27,890 | 22,297 | 57,802 | |
| 1992 | D | 26,692 | 24,011 | 63,538 | |
| 1988 | R | 23,247 | 32,729 | 56,503 | |
| 1984 | R | 21,154 | 35,831 | 57,744 | |
| 1980 | R | 22,630 | 27,237 | 54,015 | |
| 1976 | R | 26,135 | 26,745 | 54,660 | |
| 1972 | R | 19,725 | 34,447 | 55,750 | |
| 1968 | D | 24,029 | 23,748 | 54,491 | |
| 1964 | D | 34,275 | 19,112 | 53,387 | |
| 1960 | R | 22,456 | 30,588 | 53,044 | |
| 1956 | R | 17,680 | 28,767 | 46,447 | |
| 1952 | R | 20,786 | 27,464 | 48,250 | |
| 1948 | R | 17,236 | 18,548 | 35,917 | |
| 1944 | D | 22,362 | 22,207 | 44,569 | |
| 1940 | D | 25,888 | 20,681 | 46,569 | |
| 1936 | D | 26,138 | 15,483 | 42,540 | |
| 1932 | R | 17,314 | 19,028 | 36,952 | |
| 1928 | R | 10,316 | 26,666 | 37,183 | |
| 1924 | R | 8,415 | 20,340 | 30,615 | |
| 1920 | R | 14,097 | 19,869 | 34,540 | |
| 1916 | D | 8,848 | 8,715 | 18,293 | |
| 1912 | R | 5,217 | 6,036 | 16,693 | |
| 1908 | R | 6,529 | 8,917 | 16,834 | |
| 1904 | R | 4,565 | 9,355 | 15,084 | |
| 1900 | R | 6,243 | 8,806 | 15,361 | |
| 1896 | R | 6,382 | 7,667 | 14,228 | |
| 1892 | R | 5,255 | 6,214 | 12,402 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Clark County, anchored by Springfield, shifted from a presidential battleground in the early 2000s to a nearly 30-point Republican margin in 2024, tracking broader working-class realignment across Ohio's mid-sized industrial cities.
The Republican margin in Clark County reached its widest at forty-four points in 1928. The margin in 2024 was twenty-nine points, in line with the county's deep historical pattern.
Clark County's loyalty is rooted in its place. Median household income of $63,132, a 82% non-Hispanic-white share, and a population of 135,158 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 Hernando County and Madison County.
