| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 80,656 | 126,926 | 210,173 | |
| 2020 | R | 75,106 | 107,077 | 185,525 | |
| 2016 | R | 47,892 | 72,819 | 129,546 | |
| 2012 | R | 44,306 | 62,079 | 108,682 | |
| 2008 | R | 44,254 | 59,421 | 104,883 | |
| 2004 | R | 27,252 | 37,006 | 64,622 | |
| 2000 | R | 19,650 | 20,122 | 41,290 | |
| 1996 | D | 19,579 | 13,034 | 36,895 | |
| 1992 | D | 15,468 | 11,669 | 36,739 | |
| 1988 | R | 13,850 | 14,966 | 29,180 | |
| 1984 | R | 11,923 | 16,464 | 28,619 | |
| 1980 | R | 9,207 | 12,195 | 23,258 | |
| 1976 | D | 10,595 | 9,354 | 20,604 | |
| 1972 | R | 6,404 | 10,584 | 17,559 | |
| 1968 | D | 7,409 | 6,883 | 16,246 | |
| 1964 | D | 9,911 | 6,956 | 16,872 | |
| 1960 | D | 7,232 | 6,441 | 13,684 | |
| 1956 | R | 5,063 | 5,762 | 10,842 | |
| 1952 | R | 4,522 | 4,985 | 9,507 | |
| 1948 | D | 3,572 | 2,232 | 5,887 | |
| 1944 | D | 3,026 | 1,909 | 4,957 | |
| 1940 | D | 4,411 | 1,996 | 6,429 | |
| 1936 | D | 3,498 | 1,216 | 4,868 | |
| 1932 | D | 3,137 | 1,000 | 4,184 | |
| 1928 | R | 1,419 | 1,631 | 3,054 | |
| 1924 | R | 988 | 1,075 | 2,361 | |
| 1920 | R | 1,264 | 1,493 | 2,757 | |
| 1916 | D | 1,232 | 855 | 2,179 | |
| 1912 | D | 352 | 80 | 805 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Pinal sits between Phoenix and Tucson in Arizona's I-10 corridor and has absorbed significant suburban spillover growth, yet its presidential margins have held firmly Republican, running roughly 22 points to the right in 2024.
The Republican margin in Pinal County reached its widest at twenty-four points in 1972. The margin in 2024 was twenty-two points, in line with the county's deep historical pattern.
Pinal County's loyalty is rooted in its place. Median household income of $80,266, a 62% non-Hispanic-white share, and a population of 469,006 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 Wilkes County and St. Mary Parish.
