| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 1,729 | 5,981 | 7,769 | |
| 2020 | R | 1,948 | 5,627 | 7,648 | |
| 2016 | R | 1,571 | 4,587 | 6,349 | |
| 2012 | R | 1,777 | 4,216 | 6,057 | |
| 2008 | R | 2,167 | 4,076 | 6,287 | |
| 2004 | R | 1,709 | 4,291 | 6,022 | |
| 2000 | R | 1,877 | 4,092 | 6,069 | |
| 1996 | R | 2,110 | 2,687 | 5,182 | |
| 1992 | R | 2,006 | 2,502 | 5,557 | |
| 1988 | R | 2,897 | 2,983 | 5,916 | |
| 1984 | R | 2,196 | 3,962 | 6,172 | |
| 1980 | R | 2,896 | 2,931 | 5,922 | |
| 1976 | D | 3,219 | 1,789 | 5,026 | |
| 1972 | R | 1,164 | 2,707 | 3,876 | |
| 1968 | D | 1,930 | 1,476 | 4,389 | |
| 1964 | D | 3,348 | 1,190 | 4,545 | |
| 1960 | D | 2,730 | 1,554 | 4,291 | |
| 1956 | D | 2,260 | 1,767 | 4,037 | |
| 1952 | D | 2,563 | 2,249 | 4,815 | |
| 1948 | D | 2,612 | 666 | 3,599 | |
| 1944 | D | 2,804 | 841 | 3,987 | |
| 1940 | D | 3,008 | 722 | 3,732 | |
| 1936 | D | 2,674 | 352 | 3,033 | |
| 1932 | D | 3,384 | 337 | 3,728 | |
| 1928 | D | 1,319 | 1,112 | 2,431 | |
| 1924 | D | 2,499 | 463 | 3,290 | |
| 1920 | D | 1,299 | 748 | 2,484 | |
| 1916 | D | 1,675 | 649 | 2,381 | |
| 1912 | D | 1,327 | 318 | 1,831 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Gonzales County, anchored by its small namesake seat southeast of San Antonio, has delivered lopsided Republican presidential margins for decades, with 2024's R+54.8 result continuing a pattern common to rural South Texas counties outside the Rio Grande corridor.
The unraveling was not abrupt. The Democratic margin in Gonzales County peaked at eighty-two points in 1932; it narrowed steadily over the late twentieth century. The 1980 election delivered the county to the Republican party for the first time in many years, by a margin of one points. By 2024, the margin had widened further.
The economic and demographic context is severe. Gonzales County's median household income of $58,672 is among the lowest of any county in the United States; 16% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Lynn County and Crook County.