| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 15,989 | 23,301 | 39,917 | |
| 2020 | R | 15,474 | 20,516 | 36,762 | |
| 2016 | R | 10,569 | 16,328 | 28,665 | |
| 2012 | R | 9,864 | 14,033 | 24,481 | |
| 2008 | R | 11,687 | 13,817 | 25,918 | |
| 2004 | R | 9,794 | 13,290 | 23,441 | |
| 2000 | R | 6,973 | 10,310 | 18,308 | |
| 1996 | D | 6,773 | 6,323 | 14,585 | |
| 1992 | D | 6,252 | 4,980 | 14,474 | |
| 1988 | D | 8,004 | 5,991 | 14,092 | |
| 1984 | R | 4,744 | 6,439 | 11,221 | |
| 1980 | D | 4,716 | 3,768 | 8,748 | |
| 1976 | D | 4,788 | 2,383 | 7,204 | |
| 1972 | R | 1,906 | 3,097 | 5,010 | |
| 1968 | D | 2,687 | 1,455 | 5,117 | |
| 1964 | D | 3,912 | 1,130 | 5,049 | |
| 1960 | D | 2,866 | 1,208 | 4,080 | |
| 1956 | D | 2,504 | 1,531 | 4,045 | |
| 1952 | D | 3,148 | 1,540 | 4,694 | |
| 1948 | D | 2,518 | 443 | 3,237 | |
| 1944 | D | 2,604 | 385 | 3,289 | |
| 1940 | D | 2,492 | 502 | 2,996 | |
| 1936 | D | 2,395 | 198 | 2,602 | |
| 1932 | D | 3,077 | 180 | 3,259 | |
| 1928 | D | 1,534 | 850 | 2,384 | |
| 1924 | D | 2,711 | 494 | 3,452 | |
| 1920 | D | 1,088 | 484 | 2,166 | |
| 1916 | D | 1,335 | 550 | 1,909 | |
| 1912 | D | 1,021 | 216 | 1,468 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Bastrop County sits southeast of Austin along the Colorado River, drawing newcomers from the metro while remaining reliably Republican — Trump carried it by 18 points in 2024 despite a decade of rapid population growth.
The shift began with civil rights. 2000 marked the realignment in Bastrop County, by a eighteen points margin. The Republican margin reached its widest at twenty-four points in 1972. The 2024 margin was eighteen points.
The political shift has tracked, in Bastrop County, the political shift of the South more broadly. A 54% non-Hispanic-white share, a median household income of $86,226, and a 10% poverty rate describe the demographic context. The county's voting pattern over the last decade is most similar to that of Asotin County and Caldwell County.
