| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 1,289 | 686 | 1,994 | |
| 2020 | D | 1,463 | 721 | 2,219 | |
| 2016 | D | 1,458 | 652 | 2,208 | |
| 2012 | D | 1,282 | 504 | 1,817 | |
| 2008 | D | 1,252 | 489 | 1,757 | |
| 2004 | D | 1,159 | 715 | 1,890 | |
| 2000 | D | 1,064 | 618 | 1,757 | |
| 1996 | D | 1,205 | 383 | 1,716 | |
| 1992 | D | 1,189 | 400 | 1,891 | |
| 1988 | D | 1,176 | 586 | 1,771 | |
| 1984 | D | 992 | 837 | 1,902 | |
| 1980 | D | 1,039 | 723 | 1,799 | |
| 1976 | D | 1,232 | 687 | 1,936 | |
| 1972 | R | 674 | 785 | 1,462 | |
| 1968 | D | 969 | 481 | 1,582 | |
| 1964 | D | 1,156 | 431 | 1,588 | |
| 1960 | D | 866 | 376 | 1,248 | |
| 1956 | D | 517 | 494 | 1,019 | |
| 1952 | R | 621 | 770 | 1,391 | |
| 1948 | D | 907 | 212 | 1,153 | |
| 1944 | D | 648 | 211 | 1,024 | |
| 1940 | D | 917 | 163 | 1,084 | |
| 1936 | D | 938 | 106 | 1,049 | |
| 1932 | D | 863 | 112 | 977 | |
| 1928 | D | 315 | 254 | 569 | |
| 1924 | D | 267 | 68 | 348 | |
| 1920 | D | 238 | 122 | 366 | |
| 1916 | D | 245 | 27 | 273 | |
| 1912 | D | 187 | 87 | 344 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Despite covering nearly 4,000 square miles of Chihuahuan Desert, Presidio holds fewer than 8,000 residents — most concentrated in the border town of Presidio — and has backed Democratic presidential nominees by wide margins for decades.
The Democratic margin in Presidio County peaked at eighty points in 1916. By 1976 the county had flipped, voting Republican for the first time in many years. The 2024 margin was thirty points, the most Democratic-leaning result in the county's modern history.
The economic context is the key. Presidio County's median household income of $43,802 sits well below state and national norms, and 32% of residents live below the federal poverty line. The shift here is part of a broader realignment of working-class places across the country. The county's voting pattern over the last decade is most similar to that of Wilkinson County and Macon County.