| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 33,525 | 64,119 | 98,275 | |
| 2020 | R | 36,893 | 61,168 | 98,726 | |
| 2016 | R | 30,185 | 53,204 | 85,792 | |
| 2012 | R | 30,107 | 48,183 | 78,873 | |
| 2008 | R | 33,508 | 44,143 | 78,294 | |
| 2004 | R | 30,208 | 41,362 | 72,453 | |
| 2000 | R | 26,621 | 33,972 | 62,016 | |
| 1996 | R | 20,855 | 28,522 | 54,656 | |
| 1992 | R | 14,802 | 24,800 | 53,184 | |
| 1988 | R | 11,488 | 31,279 | 43,083 | |
| 1984 | R | 8,978 | 28,900 | 37,887 | |
| 1980 | R | 8,087 | 20,521 | 30,154 | |
| 1976 | R | 8,785 | 11,682 | 20,756 | |
| 1972 | R | 2,946 | 11,296 | 14,330 | |
| 1968 | R | 2,580 | 5,179 | 10,230 | |
| 1964 | R | 3,621 | 4,292 | 7,913 | |
| 1960 | R | 2,664 | 3,701 | 6,365 | |
| 1956 | R | 1,387 | 2,997 | 4,384 | |
| 1952 | R | 1,262 | 2,308 | 3,570 | |
| 1948 | R | 815 | 948 | 2,114 | |
| 1944 | D | 960 | 530 | 1,490 | |
| 1940 | D | 1,018 | 596 | 1,614 | |
| 1936 | D | 778 | 327 | 1,105 | |
| 1932 | D | 825 | 379 | 1,204 | |
| 1928 | R | 474 | 703 | 1,211 | |
| 1924 | — | — | — | — | |
| 1920 | — | — | — | — | |
| 1916 | — | — | — | — | |
| 1912 | — | — | — | — | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Martin County's relatively affluent, older population along Florida's Treasure Coast has made it one of the state's most reliably Republican suburban counties, with presidential margins that have widened steadily over the past two decades.
The Republican margin in Martin County reached its widest at fifty-eight points in 1972. The margin in 2024 was thirty-one points, in line with the county's deep historical pattern.
Martin County's loyalty is rooted in its place. Median household income of $82,943, a 78% non-Hispanic-white share, and a population of 162,176 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 Indian River County and Lake County.
