| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 8,941 | 16,726 | 26,809 | |
| 2020 | R | 9,194 | 15,803 | 25,346 | |
| 2016 | R | 7,889 | 13,614 | 22,671 | |
| 2012 | R | 10,890 | 11,443 | 22,692 | |
| 2008 | D | 12,078 | 10,457 | 22,886 | |
| 2004 | R | 11,696 | 12,030 | 23,937 | |
| 2000 | R | 8,928 | 9,848 | 19,904 | |
| 1996 | D | 8,025 | 6,158 | 17,191 | |
| 1992 | D | 8,063 | 6,572 | 20,230 | |
| 1988 | D | 8,951 | 8,527 | 17,570 | |
| 1984 | R | 8,061 | 9,587 | 17,772 | |
| 1980 | R | 8,654 | 8,791 | 18,685 | |
| 1976 | D | 8,678 | 7,393 | 16,382 | |
| 1972 | R | 5,376 | 8,418 | 14,045 | |
| 1968 | R | 5,183 | 7,526 | 13,589 | |
| 1964 | D | 8,332 | 5,701 | 14,056 | |
| 1960 | R | 6,464 | 8,640 | 15,145 | |
| 1956 | R | 5,419 | 8,634 | 14,126 | |
| 1952 | R | 4,902 | 10,013 | 14,981 | |
| 1948 | D | 6,148 | 5,516 | 12,016 | |
| 1944 | R | 5,585 | 7,137 | 12,823 | |
| 1940 | R | 6,183 | 7,806 | 14,227 | |
| 1936 | D | 7,419 | 5,067 | 13,355 | |
| 1932 | D | 7,413 | 3,852 | 11,701 | |
| 1928 | R | 3,185 | 8,455 | 11,746 | |
| 1924 | R | 377 | 2,703 | 9,180 | |
| 1920 | R | 742 | 6,887 | 8,176 | |
| 1916 | R | 1,863 | 2,746 | 4,997 | |
| 1912 | R | 1,065 | 1,414 | 3,970 | |
| 1908 | R | 1,266 | 3,247 | 4,886 | |
| 1904 | R | 625 | 3,575 | 4,566 | |
| 1900 | R | 943 | 2,950 | 4,054 | |
| 1896 | R | 1,324 | 2,772 | 4,282 | |
| 1892 | R | 767 | 1,818 | 3,169 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Barron County's economy is rooted in agriculture and light manufacturing, and its electorate has shifted decisively rightward over the past decade — the 2024 presidential margin of R+29 reflects a 20-point swing from its competitive era.
The Republican margin in Barron County reached its widest at seventy-five points in 1920. The margin in 2024 was twenty-nine points, in line with the county's deep historical pattern.
Barron County's loyalty is rooted in its place. Median household income of $65,933, a 92% non-Hispanic-white share, and a population of 46,797 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 Washburn County and Yellow Medicine County.