| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 2,198 | 6,076 | 8,410 | |
| 2020 | R | 2,335 | 6,227 | 8,760 | |
| 2016 | R | 1,949 | 5,698 | 8,195 | |
| 2012 | R | 2,430 | 5,334 | 7,921 | |
| 2008 | R | 3,228 | 5,005 | 8,356 | |
| 2004 | R | 2,767 | 5,702 | 8,540 | |
| 2000 | R | 3,215 | 4,734 | 8,152 | |
| 1996 | R | 2,955 | 3,272 | 7,013 | |
| 1992 | D | 3,341 | 3,309 | 8,276 | |
| 1988 | R | 3,184 | 4,378 | 7,598 | |
| 1984 | R | 2,886 | 5,691 | 8,604 | |
| 1980 | R | 2,564 | 5,330 | 8,294 | |
| 1976 | R | 3,826 | 4,635 | 8,522 | |
| 1972 | R | 2,656 | 5,840 | 8,506 | |
| 1968 | R | 2,824 | 5,058 | 8,537 | |
| 1964 | D | 4,695 | 4,223 | 8,918 | |
| 1960 | R | 3,532 | 5,761 | 9,299 | |
| 1956 | R | 2,774 | 5,559 | 8,339 | |
| 1952 | R | 2,706 | 5,530 | 8,241 | |
| 1948 | R | 2,893 | 4,181 | 7,129 | |
| 1944 | R | 3,323 | 4,684 | 8,035 | |
| 1940 | R | 4,513 | 5,451 | 10,031 | |
| 1936 | D | 5,029 | 4,606 | 9,694 | |
| 1932 | D | 4,954 | 3,108 | 8,236 | |
| 1928 | R | 2,239 | 4,890 | 7,171 | |
| 1924 | R | 2,315 | 4,046 | 7,270 | |
| 1920 | R | 2,308 | 4,885 | 7,491 | |
| 1916 | R | 3,768 | 4,564 | 8,741 | |
| 1912 | D | 1,633 | 1,386 | 4,467 | |
| 1908 | R | 1,917 | 2,656 | 4,800 | |
| 1904 | R | 1,685 | 2,518 | 4,595 | |
| 1900 | R | 2,106 | 2,733 | 4,928 | |
| 1896 | R | 2,140 | 2,666 | 4,867 | |
| 1892 | R | 1,999 | 2,246 | 4,449 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Douglas County, anchored by Tuscola in east-central Illinois, has shifted steadily toward lopsided Republican margins over two decades, reflecting the broader rural realignment across the Midwest's agricultural flatlands.
The Republican margin in Douglas County reached its widest at forty-six points in 2024. The margin in 2024 was forty-six points, in line with the county's deep historical pattern.
Douglas County's loyalty is rooted in its place. Median household income of $77,320, a 89% non-Hispanic-white share, and a population of 19,751 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 Cass County and Phelps County.
