| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 120,647 | 129,704 | 253,616 | |
| 2020 | D | 132,528 | 125,241 | 260,815 | |
| 2016 | R | 105,914 | 109,443 | 224,896 | |
| 2012 | R | 96,445 | 109,943 | 208,620 | |
| 2008 | R | 99,335 | 105,070 | 205,895 | |
| 2004 | R | 76,971 | 108,172 | 186,195 | |
| 2000 | R | 59,227 | 75,790 | 137,805 | |
| 1996 | R | 45,058 | 59,797 | 114,904 | |
| 1992 | R | 35,660 | 57,101 | 117,560 | |
| 1988 | R | 22,635 | 60,401 | 83,658 | |
| 1984 | R | 17,795 | 56,244 | 74,092 | |
| 1980 | R | 17,443 | 39,989 | 60,439 | |
| 1976 | R | 19,609 | 26,655 | 46,813 | |
| 1972 | R | 6,503 | 27,658 | 34,212 | |
| 1968 | R | 6,120 | 10,821 | 24,216 | |
| 1964 | R | 9,125 | 10,078 | 19,203 | |
| 1960 | R | 4,891 | 8,936 | 13,827 | |
| 1956 | R | 3,125 | 5,841 | 8,966 | |
| 1952 | R | 3,120 | 4,683 | 7,803 | |
| 1948 | D | 2,261 | 1,665 | 5,007 | |
| 1944 | D | 2,940 | 1,352 | 4,292 | |
| 1940 | D | 3,150 | 1,369 | 4,519 | |
| 1936 | D | 2,580 | 897 | 3,477 | |
| 1932 | D | 2,142 | 948 | 3,090 | |
| 1928 | R | 1,187 | 1,788 | 3,036 | |
| 1924 | D | 945 | 372 | 1,586 | |
| 1920 | D | 1,485 | 767 | 2,376 | |
| 1916 | D | 706 | 155 | 996 | |
| 1912 | — | — | — | — | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Seminole County, anchored by Sanford and a dense ring of Orlando exurbs, has trended toward competitive margins over the past decade as college-educated suburban voters have reshaped its electorate.
The Democratic margin in Seminole County has rarely exceeded fifty-five points in modern history; the Republican margin has rarely exceeded sixty-two points. 2024 delivered the county to the Republican candidate by four points.
Seminole County's demographics resemble the country more than they resemble most counties. A 59% non-Hispanic-white share, a 9% poverty rate, and a median household income of $85,761 — all within the broad national range. The county's voting pattern over the last decade is most similar to that of Virginia Beach city and Morris County.
