| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 37,213 | 21,004 | 59,602 | |
| 2020 | D | 39,861 | 22,071 | 63,151 | |
| 2016 | D | 34,183 | 20,527 | 58,356 | |
| 2012 | D | 33,436 | 22,481 | 57,223 | |
| 2008 | D | 41,450 | 21,118 | 63,215 | |
| 2004 | D | 26,965 | 22,834 | 50,467 | |
| 2000 | R | 17,523 | 19,147 | 40,220 | |
| 1996 | D | 18,531 | 16,744 | 39,609 | |
| 1992 | D | 19,712 | 16,661 | 43,587 | |
| 1988 | R | 15,855 | 20,756 | 37,038 | |
| 1984 | R | 14,719 | 21,772 | 36,826 | |
| 1980 | R | 13,316 | 18,233 | 36,894 | |
| 1976 | R | 16,609 | 18,938 | 35,695 | |
| 1972 | R | 15,241 | 19,953 | 35,596 | |
| 1968 | R | 10,789 | 13,752 | 27,080 | |
| 1964 | D | 11,918 | 10,309 | 22,372 | |
| 1960 | R | 7,535 | 14,513 | 22,184 | |
| 1956 | R | 7,732 | 13,223 | 21,015 | |
| 1952 | R | 7,745 | 12,072 | 19,925 | |
| 1948 | R | 7,375 | 9,579 | 17,532 | |
| 1944 | R | 6,809 | 8,993 | 16,125 | |
| 1940 | R | 8,117 | 10,311 | 18,499 | |
| 1936 | D | 9,220 | 8,842 | 18,110 | |
| 1932 | D | 8,478 | 7,759 | 16,497 | |
| 1928 | R | 4,317 | 8,883 | 13,259 | |
| 1924 | R | 4,689 | 6,247 | 11,312 | |
| 1920 | R | 4,751 | 5,633 | 10,500 | |
| 1916 | R | 2,796 | 3,033 | 6,029 | |
| 1912 | D | 2,396 | 1,388 | 5,511 | |
| 1908 | R | 2,780 | 3,051 | 5,926 | |
| 1904 | R | 2,286 | 3,042 | 5,451 | |
| 1900 | R | 2,397 | 2,788 | 5,292 | |
| 1896 | R | 2,422 | 2,510 | 5,000 | |
| 1892 | R | 1,937 | 2,017 | 4,396 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Home to Indiana University's main campus in Bloomington, Monroe County posts Democratic presidential margins that stand well outside Indiana's statewide norm, reflecting the outsized electoral influence of a large college-town population.
The Democratic margin in Monroe County reached its widest at thirty-two points in 2008. The margin in 2024 was twenty-seven points — still decisive.
Monroe County's loyalty is rooted in its place. Median household income of $65,868, a 82% non-Hispanic-white share, and a population of 140,965 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 Eagle County and Kalamazoo County.
