| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 4,583 | 22,234 | 27,112 | |
| 2020 | R | 4,731 | 22,004 | 27,134 | |
| 2016 | R | 4,470 | 20,012 | 25,821 | |
| 2012 | R | 6,826 | 18,108 | 25,590 | |
| 2008 | R | 7,964 | 17,290 | 25,838 | |
| 2004 | R | 7,846 | 18,306 | 26,313 | |
| 2000 | R | 7,741 | 14,817 | 23,267 | |
| 1996 | R | 8,871 | 10,798 | 23,032 | |
| 1992 | R | 7,016 | 11,098 | 24,426 | |
| 1988 | R | 6,851 | 14,914 | 21,954 | |
| 1984 | R | 5,904 | 16,379 | 22,494 | |
| 1980 | R | 7,635 | 12,773 | 21,958 | |
| 1976 | R | 9,901 | 11,580 | 21,953 | |
| 1972 | R | 6,534 | 13,862 | 21,096 | |
| 1968 | R | 7,371 | 10,926 | 20,315 | |
| 1964 | D | 12,433 | 8,581 | 21,014 | |
| 1960 | R | 7,715 | 14,048 | 21,763 | |
| 1956 | R | 7,138 | 13,447 | 20,585 | |
| 1952 | R | 7,597 | 13,670 | 21,267 | |
| 1948 | R | 8,770 | 8,956 | 17,813 | |
| 1944 | R | 8,036 | 11,135 | 19,171 | |
| 1940 | R | 9,651 | 11,147 | 20,798 | |
| 1936 | D | 11,114 | 8,375 | 20,283 | |
| 1932 | D | 11,122 | 8,284 | 19,889 | |
| 1928 | R | 5,822 | 11,765 | 17,734 | |
| 1924 | R | 7,316 | 9,166 | 17,321 | |
| 1920 | R | 8,459 | 9,552 | 18,162 | |
| 1916 | D | 6,186 | 4,322 | 10,865 | |
| 1912 | D | 5,027 | 3,107 | 10,209 | |
| 1908 | D | 6,391 | 4,951 | 11,623 | |
| 1904 | R | 5,030 | 5,203 | 10,562 | |
| 1900 | D | 6,003 | 4,834 | 11,038 | |
| 1896 | D | 6,151 | 4,384 | 10,619 | |
| 1892 | D | 4,916 | 3,737 | 9,344 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Darke County's agricultural flatlands in Ohio's western corner have produced some of the state's widest presidential margins, with the 2024 gap reaching 65 points — a figure that places it among the most one-sided counties in the Midwest.
The Republican margin in Darke County reached its widest at sixty-five points in 2024. The margin in 2024 was sixty-five points, in line with the county's deep historical pattern.
Darke County's loyalty is rooted in its place. Median household income of $64,486, a 95% non-Hispanic-white share, and a population of 51,594 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 Shelby County and Preble County.
