| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 8,582 | 15,117 | 24,242 | |
| 2020 | R | 8,485 | 14,521 | 23,571 | |
| 2016 | R | 6,124 | 11,887 | 20,060 | |
| 2012 | R | 6,829 | 12,451 | 20,012 | |
| 2008 | R | 8,610 | 12,806 | 21,766 | |
| 2004 | R | 6,433 | 14,066 | 20,764 | |
| 2000 | R | 5,465 | 10,258 | 16,204 | |
| 1996 | R | 5,938 | 9,065 | 16,337 | |
| 1992 | R | 5,377 | 7,481 | 16,203 | |
| 1988 | R | 5,284 | 9,984 | 15,478 | |
| 1984 | R | 4,167 | 9,751 | 14,087 | |
| 1980 | R | 4,111 | 7,210 | 11,965 | |
| 1976 | R | 5,333 | 5,914 | 11,352 | |
| 1972 | R | 2,981 | 7,033 | 10,670 | |
| 1968 | R | 3,978 | 4,475 | 10,224 | |
| 1964 | D | 6,035 | 3,498 | 9,560 | |
| 1960 | D | 4,916 | 4,507 | 9,426 | |
| 1956 | R | 2,558 | 3,919 | 6,483 | |
| 1952 | R | 2,162 | 2,456 | 4,620 | |
| 1948 | D | 2,361 | 1,354 | 3,733 | |
| 1944 | D | 1,892 | 1,467 | 3,362 | |
| 1940 | D | 1,788 | 1,596 | 3,389 | |
| 1936 | D | 1,989 | 1,333 | 3,355 | |
| 1932 | D | 2,091 | 969 | 3,127 | |
| 1928 | R | 1,148 | 1,250 | 2,408 | |
| 1924 | D | 886 | 832 | 2,021 | |
| 1920 | R | 1,095 | 1,229 | 2,393 | |
| 1916 | D | 824 | 561 | 1,515 | |
| 1912 | D | 420 | 220 | 1,006 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Home to Holloman Air Force Base and the Sacramento Mountains, Otero County has voted Republican by double digits in every recent presidential cycle, with its mix of military families and rural ranchers producing some of New Mexico's widest partisan margins.
The Republican margin in Otero County reached its widest at forty points in 1984. The margin in 2024 was twenty-seven points, in line with the county's deep historical pattern.
Otero County's loyalty is rooted in its place. Median household income of $55,876, a 54% non-Hispanic-white share, and a population of 68,816 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 Glynn County and Warren County.
