| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 415 | 1,382 | 1,842 | |
| 2020 | R | 437 | 1,373 | 1,850 | |
| 2016 | R | 398 | 1,139 | 1,657 | |
| 2012 | R | 713 | 1,067 | 1,821 | |
| 2008 | R | 830 | 1,065 | 1,940 | |
| 2004 | R | 875 | 1,435 | 2,327 | |
| 2000 | D | 1,272 | 791 | 2,108 | |
| 1996 | R | 956 | 998 | 2,242 | |
| 1992 | R | 799 | 803 | 2,375 | |
| 1988 | R | 1,164 | 1,247 | 2,424 | |
| 1984 | R | 960 | 1,748 | 2,718 | |
| 1980 | R | 774 | 1,963 | 2,911 | |
| 1976 | R | 1,376 | 1,449 | 2,838 | |
| 1972 | R | 1,336 | 1,617 | 2,962 | |
| 1968 | R | 1,325 | 1,596 | 3,040 | |
| 1964 | D | 1,771 | 1,511 | 3,282 | |
| 1960 | R | 1,406 | 2,204 | 3,610 | |
| 1956 | R | 1,521 | 2,173 | 3,694 | |
| 1952 | R | 1,076 | 2,692 | 3,768 | |
| 1948 | R | 1,559 | 1,625 | 3,212 | |
| 1944 | R | 1,209 | 1,936 | 3,145 | |
| 1940 | R | 1,624 | 2,622 | 4,246 | |
| 1936 | D | 2,036 | 1,883 | 4,087 | |
| 1932 | D | 2,649 | 1,572 | 4,300 | |
| 1928 | R | 1,370 | 2,665 | 4,071 | |
| 1924 | R | 325 | 1,684 | 2,962 | |
| 1920 | R | 437 | 1,753 | 2,910 | |
| 1916 | D | 1,226 | 1,016 | 2,326 | |
| 1912 | D | 668 | 0 | 1,736 | |
| 1908 | R | 557 | 1,234 | 1,917 | |
| 1904 | R | 276 | 1,409 | 1,908 | |
| 1900 | R | 752 | 996 | 1,839 | |
| 1896 | D | 816 | 695 | 1,544 | |
| 1892 | R | 197 | 731 | 1,549 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Clark County's sparse, agriculture-dependent population of roughly 4,100 has delivered lopsided Republican presidential margins for decades, with 2024's R+52.5 result consistent with the broader trend across the state's rural Great Plains interior.
The Republican margin in Clark County reached its widest at fifty-nine points in 1904. The margin in 2024 was fifty-two points, in line with the county's deep historical pattern.
Clark County's loyalty is rooted in its place. Median household income of $70,726, a 91% non-Hispanic-white share, and a population of 3,917 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 Bon Homme County and Grant County.
