| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 117,424 | 197,767 | 318,431 | |
| 2020 | R | 119,073 | 179,621 | 301,970 | |
| 2016 | R | 90,142 | 142,101 | 241,139 | |
| 2012 | R | 98,263 | 112,427 | 213,573 | |
| 2008 | R | 102,417 | 110,104 | 214,866 | |
| 2004 | R | 84,749 | 103,230 | 190,916 | |
| 2000 | D | 69,576 | 68,607 | 142,769 | |
| 1996 | D | 66,475 | 48,355 | 133,471 | |
| 1992 | D | 53,130 | 47,735 | 135,962 | |
| 1988 | R | 50,385 | 63,820 | 114,803 | |
| 1984 | R | 40,962 | 66,618 | 107,588 | |
| 1980 | R | 34,054 | 50,120 | 88,442 | |
| 1976 | D | 33,710 | 28,306 | 62,747 | |
| 1972 | R | 11,330 | 29,249 | 40,676 | |
| 1968 | R | 6,292 | 9,743 | 23,001 | |
| 1964 | D | 8,135 | 7,606 | 15,741 | |
| 1960 | R | 5,832 | 7,188 | 13,020 | |
| 1956 | R | 4,181 | 5,501 | 9,682 | |
| 1952 | R | 3,549 | 4,562 | 8,111 | |
| 1948 | D | 2,375 | 1,839 | 4,881 | |
| 1944 | D | 2,523 | 1,352 | 3,875 | |
| 1940 | D | 3,091 | 1,362 | 4,453 | |
| 1936 | D | 2,229 | 1,159 | 3,388 | |
| 1932 | D | 2,504 | 806 | 3,310 | |
| 1928 | R | 1,308 | 1,591 | 2,932 | |
| 1924 | D | 780 | 472 | 1,456 | |
| 1920 | D | 1,166 | 630 | 1,884 | |
| 1916 | D | 779 | 236 | 1,191 | |
| 1912 | D | 485 | 60 | 719 | |
| 1908 | D | 436 | 81 | 570 | |
| 1904 | D | 453 | 96 | 570 | |
| 1900 | D | 492 | 32 | 581 | |
| 1896 | D | 482 | 70 | 562 | |
| 1892 | D | 471 | 0 | 566 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Pasco's population has surged with retirees and families relocating from Tampa's urban core, a demographic wave that has coincided with a Republican margin climbing from single digits in the early 2000s to over 25 points in 2024.
The shift began with civil rights. 2004 marked the realignment in Pasco County, by a ten points margin. The Republican margin reached its widest at forty-four points in 1972. The 2024 margin was twenty-five points.
The political shift has tracked, in Pasco County, the political shift of the South more broadly. A 72% non-Hispanic-white share, a median household income of $70,492, and a 11% poverty rate describe the demographic context. The county's voting pattern over the last decade is most similar to that of Hernando County and Chautauqua County.
