| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 114,670 | 105,303 | 223,268 | |
| 2020 | D | 119,390 | 98,714 | 221,360 | |
| 2016 | D | 102,751 | 84,175 | 197,641 | |
| 2012 | D | 128,978 | 71,808 | 203,742 | |
| 2008 | D | 143,927 | 72,451 | 219,896 | |
| 2004 | D | 128,334 | 83,870 | 213,775 | |
| 2000 | D | 119,833 | 66,641 | 190,865 | |
| 1996 | D | 106,065 | 49,332 | 174,056 | |
| 1992 | D | 105,156 | 47,834 | 199,998 | |
| 1988 | D | 104,880 | 70,922 | 176,859 | |
| 1984 | R | 89,491 | 92,943 | 183,387 | |
| 1980 | D | 90,393 | 78,572 | 183,900 | |
| 1976 | D | 88,967 | 80,004 | 171,438 | |
| 1972 | R | 73,896 | 85,747 | 162,449 | |
| 1968 | D | 75,174 | 63,948 | 164,013 | |
| 1964 | D | 100,346 | 48,311 | 148,878 | |
| 1960 | R | 72,059 | 74,940 | 147,457 | |
| 1956 | R | 62,808 | 75,431 | 138,474 | |
| 1952 | R | 56,753 | 62,220 | 119,712 | |
| 1948 | D | 45,032 | 38,270 | 86,228 | |
| 1944 | D | 52,444 | 41,145 | 94,116 | |
| 1940 | D | 50,300 | 38,495 | 89,283 | |
| 1936 | D | 49,891 | 21,097 | 73,931 | |
| 1932 | D | 36,860 | 28,231 | 67,267 | |
| 1928 | R | 10,910 | 42,743 | 53,853 | |
| 1924 | R | 4,225 | 34,264 | 40,878 | |
| 1920 | R | 7,408 | 24,543 | 32,873 | |
| 1916 | R | 9,311 | 9,353 | 19,315 | |
| 1912 | R | 3,005 | 3,426 | 13,313 | |
| 1908 | R | 3,234 | 7,211 | 11,213 | |
| 1904 | R | 2,281 | 6,594 | 9,605 | |
| 1900 | R | 3,934 | 6,478 | 10,901 | |
| 1896 | R | 4,915 | 5,638 | 10,843 | |
| 1892 | R | 3,712 | 4,785 | 9,543 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Home to Flint, Genesee County built its political identity around auto-industry labor, but deindustrialization and the 2014–15 water crisis reshaped its electorate — it backed Democrats by 4.2 points in 2024, a narrower margin than a decade prior.
The Democratic margin in Genesee County reached its widest at thirty-nine points in 1936. The margin in 2024 was four points — still decisive.
Genesee County's loyalty is rooted in its place. Median household income of $62,281, a 72% non-Hispanic-white share, and a population of 403,305 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 Surry County and Rock Island County.
