| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 31,727 | 41,056 | 73,832 | |
| 2020 | R | 34,415 | 41,844 | 77,662 | |
| 2016 | R | 28,296 | 40,422 | 73,067 | |
| 2012 | R | 31,725 | 39,389 | 72,588 | |
| 2008 | D | 39,423 | 37,512 | 77,656 | |
| 2004 | R | 28,767 | 41,463 | 70,654 | |
| 2000 | R | 29,222 | 35,846 | 66,221 | |
| 1996 | D | 30,934 | 28,509 | 65,961 | |
| 1992 | D | 33,799 | 30,271 | 76,840 | |
| 1988 | R | 31,270 | 38,928 | 70,453 | |
| 1984 | R | 31,049 | 40,994 | 72,330 | |
| 1980 | R | 29,930 | 36,248 | 70,982 | |
| 1976 | R | 34,911 | 37,975 | 73,211 | |
| 1972 | R | 22,163 | 48,806 | 71,437 | |
| 1968 | R | 31,326 | 38,231 | 77,577 | |
| 1964 | D | 45,796 | 27,231 | 73,407 | |
| 1960 | R | 36,330 | 41,068 | 77,635 | |
| 1956 | R | 30,860 | 42,462 | 73,619 | |
| 1952 | R | 29,718 | 42,010 | 72,187 | |
| 1948 | D | 32,640 | 27,584 | 60,956 | |
| 1944 | D | 34,440 | 30,684 | 65,462 | |
| 1940 | D | 38,567 | 28,417 | 67,267 | |
| 1936 | D | 41,490 | 14,725 | 57,085 | |
| 1932 | D | 31,828 | 16,873 | 49,752 | |
| 1928 | R | 19,646 | 29,067 | 48,905 | |
| 1924 | R | 17,186 | 25,907 | 46,856 | |
| 1920 | R | 13,904 | 19,357 | 36,946 | |
| 1916 | D | 10,028 | 9,966 | 20,973 | |
| 1912 | D | 7,219 | 4,839 | 17,558 | |
| 1908 | R | 8,033 | 9,116 | 18,443 | |
| 1904 | R | 5,885 | 8,624 | 16,696 | |
| 1900 | R | 7,178 | 8,228 | 15,950 | |
| 1896 | R | 7,132 | 8,068 | 15,297 | |
| 1892 | R | 6,166 | 6,175 | 12,727 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Vanderburgh County, home to Evansville, functions as the regional hub of the Tri-State area where Indiana, Kentucky, and Illinois converge. Despite its mid-sized city center, it has shifted steadily toward Republican margins over the past decade.
The county's recent history is a story of close margins. The Democratic margin reached forty-seven points in 1936; the Republican margin reached thirty-seven points in 1972. Most other elections have been decided by single-digit points.
Vanderburgh County's demographics — a population of 180,117, a 81% non-Hispanic-white share, a median household income of $61,648 — situate the county close to national averages on several dimensions. The county's voting pattern over the last decade is most similar to that of Charlevoix County and Floyd County.