| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 15,179 | 11,702 | 27,652 | |
| 2020 | D | 17,628 | 10,590 | 28,830 | |
| 2016 | D | 12,521 | 7,841 | 22,122 | |
| 2012 | D | 11,276 | 7,343 | 19,081 | |
| 2008 | D | 11,917 | 7,425 | 19,788 | |
| 2004 | D | 9,851 | 8,698 | 18,725 | |
| 2000 | D | 9,131 | 7,015 | 16,831 | |
| 1996 | D | 7,030 | 5,384 | 13,906 | |
| 1992 | D | 5,354 | 4,112 | 12,739 | |
| 1988 | R | 4,559 | 5,578 | 10,308 | |
| 1984 | R | 3,554 | 5,695 | 9,380 | |
| 1980 | R | 2,749 | 4,054 | 7,602 | |
| 1976 | R | 3,122 | 3,398 | 6,680 | |
| 1972 | R | 2,582 | 3,961 | 6,881 | |
| 1968 | R | 2,809 | 2,961 | 6,229 | |
| 1964 | D | 3,779 | 2,444 | 6,237 | |
| 1960 | R | 2,876 | 3,056 | 5,945 | |
| 1956 | R | 2,201 | 3,252 | 5,463 | |
| 1952 | R | 1,891 | 3,503 | 5,415 | |
| 1948 | R | 2,096 | 2,775 | 4,987 | |
| 1944 | R | 1,998 | 2,253 | 4,267 | |
| 1940 | D | 2,441 | 2,407 | 4,883 | |
| 1936 | D | 2,565 | 1,515 | 4,142 | |
| 1932 | D | 2,283 | 1,269 | 3,744 | |
| 1928 | R | 1,366 | 1,971 | 3,348 | |
| 1924 | R | 361 | 1,443 | 2,695 | |
| 1920 | R | 900 | 1,965 | 3,023 | |
| 1916 | D | 1,688 | 1,440 | 3,259 | |
| 1912 | D | 1,253 | 0 | 2,573 | |
| 1908 | R | 684 | 937 | 1,749 | |
| 1904 | R | 645 | 888 | 1,629 | |
| 1900 | D | 786 | 724 | 1,550 | |
| 1896 | D | 956 | 729 | 1,716 | |
| 1892 | D | 759 | 616 | 1,666 | |
| 1888 | D | 797 | 664 | 1,553 | |
| 1884 | D | 665 | 574 | 1,279 | |
| 1880 | D | 646 | 429 | 1,080 | |
| 1876 | D | 664 | 434 | 1,100 |
San Benito's population is roughly 60% Latino, a share that has climbed steadily for two decades and correlates with the county's shift from competitive to reliably Democratic in statewide and federal contests.
The Democratic margin in San Benito County reached its widest at forty-nine points in 1912. The margin in 2024 was thirteen points — still decisive.
San Benito County's loyalty is rooted in its place. Median household income of $114,394, a 37% non-Hispanic-white share, and a population of 67,290 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 Doña Ana County and Martinsville city.
