| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 419,519 | 337,791 | 773,913 | |
| 2020 | D | 434,148 | 325,971 | 770,351 | |
| 2016 | D | 343,070 | 289,203 | 668,925 | |
| 2012 | D | 349,002 | 296,514 | 653,571 | |
| 2008 | D | 372,566 | 276,956 | 659,068 | |
| 2004 | D | 319,387 | 316,633 | 641,977 | |
| 2000 | D | 281,201 | 274,319 | 570,265 | |
| 1996 | D | 241,884 | 219,855 | 505,642 | |
| 1992 | R | 214,733 | 242,160 | 555,760 | |
| 1988 | R | 174,745 | 283,359 | 462,488 | |
| 1984 | R | 150,286 | 306,050 | 458,800 | |
| 1980 | R | 164,869 | 253,211 | 463,328 | |
| 1976 | R | 164,266 | 244,271 | 416,205 | |
| 1972 | R | 129,400 | 241,613 | 378,851 | |
| 1968 | R | 154,630 | 156,538 | 345,458 | |
| 1964 | D | 182,797 | 114,025 | 297,508 | |
| 1960 | R | 135,531 | 162,026 | 298,562 | |
| 1956 | R | 99,901 | 152,990 | 253,418 | |
| 1952 | R | 73,871 | 115,503 | 190,179 | |
| 1948 | R | 51,491 | 62,516 | 116,866 | |
| 1944 | R | 55,272 | 59,627 | 115,813 | |
| 1940 | R | 47,022 | 49,002 | 96,623 | |
| 1936 | D | 40,329 | 30,071 | 73,997 | |
| 1932 | D | 33,135 | 32,462 | 67,928 | |
| 1928 | R | 10,011 | 45,343 | 55,618 | |
| 1924 | R | 4,105 | 28,603 | 35,196 | |
| 1920 | R | 6,421 | 19,321 | 27,220 | |
| 1916 | R | 6,659 | 7,730 | 14,906 | |
| 1912 | R | 3,668 | 4,083 | 11,513 | |
| 1908 | R | 3,950 | 6,267 | 10,771 | |
| 1904 | R | 3,956 | 6,986 | 11,289 | |
| 1900 | R | 4,966 | 6,173 | 11,638 | |
| 1896 | R | 5,271 | 5,846 | 12,705 | |
| 1892 | D | 4,925 | 4,763 | 10,590 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Once reliably Republican, Oakland County flipped in 2016 and has widened its Democratic margin each cycle since, reflecting a college-educated suburban electorate that has reoriented around post-industrial Detroit's expanding professional class.
The Democratic margin in Oakland County reached its widest at twenty-three points in 1964. The margin in 2024 was eleven points — still decisive.
Oakland County's loyalty is rooted in its place. Median household income of $97,760, a 69% non-Hispanic-white share, and a population of 1,279,825 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 Orange County and Lake County.
