| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 7,514 | 8,807 | 16,609 | |
| 2020 | R | 7,457 | 8,218 | 15,923 | |
| 2016 | R | 6,371 | 7,004 | 14,275 | |
| 2012 | D | 8,044 | 5,942 | 14,269 | |
| 2008 | D | 8,463 | 5,367 | 14,075 | |
| 2004 | D | 7,924 | 6,774 | 14,845 | |
| 2000 | D | 6,577 | 5,684 | 13,044 | |
| 1996 | D | 5,572 | 3,796 | 11,226 | |
| 1992 | D | 5,673 | 4,072 | 12,716 | |
| 1988 | D | 5,754 | 5,226 | 11,078 | |
| 1984 | R | 5,051 | 6,469 | 11,603 | |
| 1980 | R | 5,501 | 6,528 | 12,773 | |
| 1976 | R | 5,534 | 6,132 | 11,892 | |
| 1972 | R | 3,407 | 6,836 | 10,385 | |
| 1968 | R | 3,666 | 5,824 | 10,555 | |
| 1964 | D | 6,242 | 4,640 | 10,898 | |
| 1960 | R | 4,836 | 6,909 | 11,760 | |
| 1956 | R | 4,923 | 6,200 | 11,140 | |
| 1952 | R | 4,032 | 7,619 | 11,663 | |
| 1948 | D | 5,226 | 4,139 | 9,470 | |
| 1944 | R | 5,409 | 5,676 | 11,121 | |
| 1940 | R | 5,776 | 6,614 | 12,492 | |
| 1936 | D | 6,044 | 4,811 | 11,357 | |
| 1932 | D | 5,939 | 2,979 | 9,057 | |
| 1928 | R | 2,559 | 6,596 | 9,254 | |
| 1924 | R | 406 | 2,670 | 8,779 | |
| 1920 | R | 627 | 5,694 | 6,619 | |
| 1916 | R | 1,830 | 2,912 | 4,967 | |
| 1912 | R | 1,253 | 2,663 | 4,617 | |
| 1908 | R | 1,561 | 4,114 | 5,902 | |
| 1904 | R | 762 | 4,744 | 5,761 | |
| 1900 | R | 1,268 | 4,463 | 5,904 | |
| 1896 | R | 1,627 | 4,393 | 6,157 | |
| 1892 | R | 1,440 | 3,106 | 5,181 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Vernon County's economy revolves around agriculture and small manufacturing, and its presidential margins have shifted more than 20 points toward Republicans since 2000, a pattern common to dairying communities across western Wisconsin.
The Democratic margin in Vernon County has rarely exceeded thirty-three points in modern history; the Republican margin has rarely exceeded seventy-seven points. 2024 delivered the county to the Republican candidate by eight points.
Vernon County's demographics resemble the country more than they resemble most counties. A 95% non-Hispanic-white share, a 13% poverty rate, and a median household income of $71,893 — all within the broad national range. The county's voting pattern over the last decade is most similar to that of Crawford County and Roosevelt County.