| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 7,384 | 18,027 | 25,918 | |
| 2020 | R | 7,138 | 16,491 | 24,235 | |
| 2016 | R | 5,657 | 13,635 | 21,016 | |
| 2012 | R | 8,024 | 11,675 | 20,217 | |
| 2008 | R | 8,248 | 11,324 | 20,053 | |
| 2004 | R | 7,883 | 11,190 | 19,313 | |
| 2000 | R | 6,247 | 7,668 | 14,929 | |
| 1996 | D | 6,041 | 4,450 | 12,955 | |
| 1992 | D | 5,386 | 3,988 | 13,366 | |
| 1988 | D | 6,075 | 5,246 | 11,452 | |
| 1984 | R | 5,378 | 5,660 | 11,117 | |
| 1980 | D | 5,457 | 4,480 | 10,809 | |
| 1976 | D | 6,013 | 3,159 | 9,417 | |
| 1972 | R | 3,660 | 3,715 | 7,634 | |
| 1968 | D | 3,439 | 2,429 | 6,337 | |
| 1964 | D | 4,026 | 1,982 | 6,018 | |
| 1960 | R | 2,599 | 3,067 | 5,694 | |
| 1956 | D | 2,605 | 2,348 | 4,959 | |
| 1952 | R | 2,393 | 2,682 | 5,142 | |
| 1948 | D | 2,758 | 1,918 | 4,994 | |
| 1944 | D | 2,225 | 2,205 | 4,487 | |
| 1940 | D | 2,654 | 2,617 | 5,361 | |
| 1936 | D | 3,442 | 1,437 | 5,123 | |
| 1932 | D | 3,147 | 1,484 | 4,877 | |
| 1928 | R | 1,191 | 3,137 | 4,410 | |
| 1924 | R | 79 | 1,588 | 4,016 | |
| 1920 | R | 405 | 3,007 | 4,450 | |
| 1916 | R | 935 | 1,123 | 2,331 | |
| 1912 | D | 333 | 314 | 2,160 | |
| 1908 | R | 466 | 1,198 | 2,049 | |
| 1904 | R | 137 | 1,603 | 1,907 | |
| 1900 | R | 504 | 1,525 | 2,098 | |
| 1896 | R | 750 | 1,490 | 2,240 | |
| 1892 | D | 728 | 105 | 1,397 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Isanti County, anchored by small towns along the Rum River corridor northeast of the Twin Cities, has shifted dramatically over two decades from competitive to reliably Republican, tracking a broader rural and exurban realignment across the upper Midwest.
The Republican margin in Isanti County reached its widest at seventy-seven points in 1904. The margin in 2024 was forty-one points, in line with the county's deep historical pattern.
Isanti County's loyalty is rooted in its place. Median household income of $87,440, a 92% non-Hispanic-white share, and a population of 42,596 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 Gilmer County and Lewis County.
