| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 806 | 5,205 | 6,066 | |
| 2020 | R | 850 | 4,943 | 5,863 | |
| 2016 | R | 836 | 3,927 | 4,943 | |
| 2012 | R | 795 | 3,639 | 4,482 | |
| 2008 | R | 790 | 3,816 | 4,629 | |
| 2004 | R | 677 | 3,837 | 4,536 | |
| 2000 | R | 876 | 3,091 | 4,024 | |
| 1996 | R | 1,181 | 2,360 | 4,001 | |
| 1992 | R | 1,081 | 2,266 | 4,228 | |
| 1988 | R | 1,122 | 3,052 | 4,191 | |
| 1984 | R | 820 | 3,918 | 4,750 | |
| 1980 | R | 1,155 | 2,800 | 4,013 | |
| 1976 | R | 1,777 | 2,127 | 3,937 | |
| 1972 | R | 677 | 2,615 | 3,310 | |
| 1968 | R | 922 | 1,400 | 3,634 | |
| 1964 | D | 2,133 | 1,442 | 3,585 | |
| 1960 | D | 1,821 | 1,550 | 3,409 | |
| 1956 | R | 968 | 1,131 | 2,113 | |
| 1952 | D | 920 | 805 | 1,729 | |
| 1948 | D | 816 | 101 | 957 | |
| 1944 | D | 329 | 48 | 404 | |
| 1940 | D | 440 | 26 | 466 | |
| 1936 | D | 287 | 18 | 306 | |
| 1932 | D | 186 | 6 | 193 | |
| 1928 | R | 25 | 66 | 91 | |
| 1924 | D | 60 | 7 | 71 | |
| 1920 | D | 74 | 9 | 83 | |
| 1916 | D | 71 | 0 | 74 | |
| 1912 | D | 77 | 1 | 83 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Andrews County, anchored by the Permian Basin oil town of the same name, delivered a 72.6-point Republican margin in 2024—among the widest in a state already known for its deep-red rural precincts.
The unraveling was not abrupt. The Democratic margin in Andrews County peaked at ninety-six points in 1916; it narrowed steadily over the late twentieth century. The 1968 election delivered the county to the Republican party for the first time in many years, by a margin of thirteen points. By 2024, the margin had widened further.
The economic and demographic context is severe. Andrews County's median household income of $72,242 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 Yoakum County and Reagan County.