| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 321,348 | 341,963 | 671,827 | |
| 2020 | D | 376,367 | 327,398 | 712,063 | |
| 2016 | D | 307,896 | 266,870 | 597,660 | |
| 2012 | D | 286,467 | 250,186 | 542,102 | |
| 2008 | D | 272,963 | 236,355 | 513,312 | |
| 2004 | R | 214,132 | 245,576 | 463,222 | |
| 2000 | R | 169,576 | 180,794 | 360,354 | |
| 1996 | D | 144,266 | 136,656 | 308,271 | |
| 1992 | R | 115,282 | 130,643 | 310,502 | |
| 1988 | R | 99,014 | 150,151 | 250,716 | |
| 1984 | R | 86,230 | 157,926 | 244,208 | |
| 1980 | R | 88,271 | 106,160 | 205,314 | |
| 1976 | D | 94,589 | 78,504 | 175,145 | |
| 1972 | R | 45,305 | 106,956 | 152,510 | |
| 1968 | R | 45,848 | 49,441 | 142,202 | |
| 1964 | D | 71,289 | 50,616 | 121,905 | |
| 1960 | D | 62,240 | 48,887 | 111,127 | |
| 1956 | R | 38,610 | 41,889 | 80,499 | |
| 1952 | R | 33,252 | 36,316 | 69,568 | |
| 1948 | D | 18,854 | 13,529 | 41,286 | |
| 1944 | D | 31,146 | 10,252 | 41,398 | |
| 1940 | D | 30,738 | 7,805 | 38,543 | |
| 1936 | D | 20,202 | 5,361 | 25,563 | |
| 1932 | D | 19,143 | 4,711 | 23,854 | |
| 1928 | R | 9,993 | 11,703 | 22,088 | |
| 1924 | D | 4,470 | 1,585 | 7,180 | |
| 1920 | D | 6,976 | 3,772 | 12,349 | |
| 1916 | D | 4,627 | 691 | 6,615 | |
| 1912 | D | 2,641 | 159 | 3,905 | |
| 1908 | D | 2,703 | 367 | 3,694 | |
| 1904 | D | 1,976 | 516 | 3,151 | |
| 1900 | D | 2,257 | 349 | 3,245 | |
| 1896 | D | 2,115 | 584 | 2,899 | |
| 1892 | D | 2,718 | 0 | 2,843 | |
| 1888 | — | — | — | — | |
| 1884 | D | 1,257 | 353 | 1,610 | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Hillsborough County, anchored by Tampa, had trended Democratic for a decade before returning an R+3.1 margin in 2024—a shift driven in part by movement among Hispanic voters in the county's growing suburban and urban precincts.
The Democratic margin in Hillsborough County has rarely exceeded ninety-six points in modern history; the Republican margin has rarely exceeded forty points. 2024 delivered the county to the Republican candidate by three points.
Hillsborough County's demographics resemble the country more than they resemble most counties. A 51% non-Hispanic-white share, a 13% poverty rate, and a median household income of $79,540 — all within the broad national range. The county's voting pattern over the last decade is most similar to that of San Bernardino County and Will County.
