| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 705 | 1,140 | 1,862 | |
| 2020 | R | 823 | 1,120 | 1,974 | |
| 2016 | R | 784 | 910 | 1,872 | |
| 2012 | D | 995 | 899 | 1,935 | |
| 2008 | D | 993 | 936 | 1,951 | |
| 2004 | R | 861 | 1,081 | 1,964 | |
| 2000 | R | 839 | 954 | 1,834 | |
| 1996 | D | 943 | 789 | 1,952 | |
| 1992 | D | 995 | 871 | 2,315 | |
| 1988 | R | 901 | 1,100 | 2,020 | |
| 1984 | R | 860 | 1,282 | 2,161 | |
| 1980 | R | 840 | 1,059 | 1,991 | |
| 1976 | D | 938 | 891 | 1,835 | |
| 1972 | R | 562 | 1,051 | 1,657 | |
| 1968 | D | 678 | 606 | 1,544 | |
| 1964 | D | 995 | 628 | 1,634 | |
| 1960 | D | 889 | 750 | 1,643 | |
| 1956 | R | 771 | 790 | 1,564 | |
| 1952 | R | 757 | 781 | 1,544 | |
| 1948 | D | 859 | 374 | 1,242 | |
| 1944 | D | 807 | 367 | 1,174 | |
| 1940 | D | 1,049 | 516 | 1,565 | |
| 1936 | D | 1,115 | 326 | 1,459 | |
| 1932 | D | 1,131 | 299 | 1,460 | |
| 1928 | R | 509 | 561 | 1,071 | |
| 1924 | D | 476 | 261 | 926 | |
| 1920 | D | 551 | 443 | 1,011 | |
| 1916 | — | — | — | — | |
| 1912 | — | — | — | — | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Hidalgo County sits at New Mexico's bootheel, where the economy traces back to open-range cattle and the legacy of the Chino copper mine. Its sparse, rural electorate has shifted steadily rightward over the past two decades, landing at a 23-point Republican margin in 2024.
The county's recent history is a story of close margins. The Democratic margin reached fifty-seven points in 1932; the Republican margin reached thirty points in 1972. Most other elections have been decided by single-digit points.
Hidalgo County's demographics — a population of 4,041, a 56% non-Hispanic-white share, a median household income of $48,882 — situate the county close to national averages on several dimensions. The county's voting pattern over the last decade is most similar to that of Luna County and Warren County.