| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 82,277 | 221,964 | 307,258 | |
| 2020 | R | 74,377 | 193,382 | 271,543 | |
| 2016 | R | 45,835 | 150,314 | 205,904 | |
| 2012 | R | 32,920 | 137,969 | 173,523 | |
| 2008 | R | 36,703 | 119,884 | 157,847 | |
| 2004 | R | 28,628 | 104,654 | 133,988 | |
| 2000 | R | 23,286 | 80,600 | 106,213 | |
| 1996 | R | 20,722 | 51,011 | 78,202 | |
| 1992 | R | 18,551 | 39,976 | 77,958 | |
| 1988 | R | 18,394 | 40,360 | 59,146 | |
| 1984 | R | 13,293 | 41,230 | 54,690 | |
| 1980 | R | 12,593 | 26,237 | 39,971 | |
| 1976 | R | 13,718 | 15,739 | 29,659 | |
| 1972 | R | 4,358 | 15,067 | 19,447 | |
| 1968 | R | 4,021 | 4,353 | 13,255 | |
| 1964 | D | 4,989 | 3,167 | 8,196 | |
| 1960 | D | 3,510 | 3,309 | 6,937 | |
| 1956 | R | 2,572 | 3,360 | 5,974 | |
| 1952 | D | 3,432 | 2,969 | 6,410 | |
| 1948 | D | 1,795 | 544 | 3,338 | |
| 1944 | D | 2,902 | 219 | 3,620 | |
| 1940 | D | 3,347 | 408 | 3,755 | |
| 1936 | D | 2,443 | 186 | 2,638 | |
| 1932 | D | 1,971 | 126 | 2,099 | |
| 1928 | D | 905 | 613 | 1,519 | |
| 1924 | D | 1,500 | 166 | 1,689 | |
| 1920 | D | 935 | 203 | 1,450 | |
| 1916 | D | 880 | 197 | 1,221 | |
| 1912 | D | 613 | 120 | 949 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Montgomery County, north of Houston, has absorbed rapid suburban and exurban growth while sustaining presidential margins above R+40 for over a decade, making it a consistent anchor of Republican vote totals in statewide contests.
The shift began with civil rights. 1968 marked the realignment in Montgomery County, by a three points margin. The Republican margin reached its widest at sixty-one points in 2012. The 2024 margin was forty-five points.
The political shift has tracked, in Montgomery County, the political shift of the South more broadly. A 67% non-Hispanic-white share, a median household income of $97,701, and a 9% poverty rate describe the demographic context. The county's voting pattern over the last decade is most similar to that of Comal County and Randall County.
