| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 2,734 | 11,197 | 14,051 | |
| 2020 | R | 2,833 | 9,432 | 12,414 | |
| 2016 | R | 2,194 | 7,065 | 9,533 | |
| 2012 | R | 2,339 | 6,141 | 8,601 | |
| 2008 | R | 2,704 | 5,562 | 8,322 | |
| 2004 | R | 2,713 | 5,263 | 8,030 | |
| 2000 | R | 2,450 | 4,197 | 6,802 | |
| 1996 | D | 2,584 | 2,564 | 5,701 | |
| 1992 | D | 2,594 | 2,402 | 6,217 | |
| 1988 | R | 2,735 | 2,820 | 5,582 | |
| 1984 | R | 2,370 | 3,365 | 5,752 | |
| 1980 | D | 2,440 | 2,087 | 4,602 | |
| 1976 | D | 2,656 | 1,473 | 4,148 | |
| 1972 | R | 1,116 | 2,243 | 3,376 | |
| 1968 | D | 1,473 | 1,076 | 3,525 | |
| 1964 | D | 2,229 | 1,014 | 3,247 | |
| 1960 | D | 1,713 | 1,053 | 2,778 | |
| 1956 | R | 1,079 | 1,281 | 2,374 | |
| 1952 | R | 1,362 | 1,557 | 2,920 | |
| 1948 | D | 901 | 336 | 1,720 | |
| 1944 | D | 1,559 | 137 | 1,970 | |
| 1940 | D | 2,899 | 298 | 3,199 | |
| 1936 | D | 1,851 | 136 | 1,989 | |
| 1932 | D | 2,065 | 153 | 2,223 | |
| 1928 | D | 1,175 | 701 | 1,876 | |
| 1924 | D | 2,136 | 177 | 2,345 | |
| 1920 | D | 1,027 | 214 | 1,449 | |
| 1916 | D | 1,108 | 108 | 1,243 | |
| 1912 | D | 941 | 35 | 1,052 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Grimes County, a sparsely populated stretch of East Texas pine and farmland, has delivered Republican presidential margins exceeding 60 points, reflecting a rural demographic shift that accelerated sharply over the past two decades.
The shift began with civil rights. 2000 marked the realignment in Grimes County, by a twenty-six points margin. The Republican margin reached its widest at sixty points in 2024. The 2024 margin was sixty points.
The political shift has tracked, in Grimes County, the political shift of the South more broadly. A 61% non-Hispanic-white share, a median household income of $69,803, and a 15% poverty rate describe the demographic context. The county's voting pattern over the last decade is most similar to that of Jones County and Polk County.