| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 3,160 | 13,202 | 16,492 | |
| 2020 | R | 3,176 | 12,514 | 15,850 | |
| 2016 | R | 2,288 | 10,446 | 13,214 | |
| 2012 | R | 2,055 | 10,306 | 12,550 | |
| 2008 | R | 2,576 | 9,563 | 12,338 | |
| 2004 | R | 2,104 | 9,297 | 11,553 | |
| 2000 | R | 1,511 | 8,096 | 9,920 | |
| 1996 | R | 1,655 | 5,867 | 8,151 | |
| 1992 | R | 1,600 | 4,712 | 8,372 | |
| 1988 | R | 1,588 | 5,662 | 7,313 | |
| 1984 | R | 1,137 | 5,496 | 6,651 | |
| 1980 | R | 1,170 | 4,736 | 6,018 | |
| 1976 | R | 1,260 | 3,541 | 4,885 | |
| 1972 | R | 526 | 3,490 | 4,074 | |
| 1968 | R | 725 | 2,945 | 4,105 | |
| 1964 | D | 2,264 | 1,695 | 3,960 | |
| 1960 | R | 816 | 2,687 | 3,507 | |
| 1956 | R | 240 | 3,070 | 3,315 | |
| 1952 | R | 300 | 3,687 | 3,995 | |
| 1948 | R | 593 | 2,741 | 3,413 | |
| 1944 | R | 333 | 2,950 | 3,573 | |
| 1940 | R | 487 | 3,213 | 3,704 | |
| 1936 | R | 1,016 | 1,421 | 2,514 | |
| 1932 | D | 2,642 | 662 | 3,317 | |
| 1928 | R | 1,174 | 1,447 | 2,625 | |
| 1924 | R | 352 | 768 | 2,702 | |
| 1920 | R | 137 | 1,270 | 2,104 | |
| 1916 | R | 405 | 1,463 | 1,882 | |
| 1912 | D | 307 | 219 | 1,606 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Gillespie County's German-immigrant heritage shaped a conservative voting tradition that has deepened steadily over decades, with the 2024 presidential margin exceeding 60 points — among the widest in the Texas Hill Country.
The Republican margin in Gillespie County reached its widest at eighty-five points in 1956. The margin in 2024 was sixty-one points, in line with the county's deep historical pattern.
Gillespie County's loyalty is rooted in its place. Median household income of $76,162, a 82% non-Hispanic-white share, and a population of 27,524 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 Kerr County and Blaine County.
