| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 5,032 | 18,141 | 23,472 | |
| 2020 | R | 5,424 | 17,454 | 23,222 | |
| 2016 | R | 5,033 | 13,147 | 19,667 | |
| 2012 | R | 6,142 | 12,583 | 19,269 | |
| 2008 | R | 7,351 | 12,500 | 20,093 | |
| 2004 | R | 6,880 | 13,268 | 20,270 | |
| 2000 | R | 7,108 | 10,335 | 17,787 | |
| 1996 | D | 8,959 | 8,534 | 18,998 | |
| 1992 | D | 7,409 | 7,313 | 18,202 | |
| 1988 | R | 8,544 | 9,805 | 18,535 | |
| 1984 | R | 7,364 | 11,810 | 19,365 | |
| 1980 | R | 7,028 | 9,817 | 17,359 | |
| 1976 | D | 9,073 | 7,698 | 16,886 | |
| 1972 | R | 5,040 | 9,921 | 15,346 | |
| 1968 | R | 6,093 | 7,193 | 15,066 | |
| 1964 | D | 11,216 | 6,747 | 18,032 | |
| 1960 | D | 8,707 | 7,986 | 16,780 | |
| 1956 | D | 7,820 | 6,691 | 14,618 | |
| 1952 | D | 7,495 | 6,041 | 13,591 | |
| 1948 | D | 7,593 | 2,305 | 10,021 | |
| 1944 | D | 5,228 | 2,083 | 7,327 | |
| 1940 | D | 4,968 | 1,625 | 6,604 | |
| 1936 | D | 4,349 | 1,027 | 5,425 | |
| 1932 | D | 3,565 | 818 | 4,459 | |
| 1928 | R | 1,212 | 1,618 | 2,833 | |
| 1924 | D | 1,524 | 658 | 2,320 | |
| 1920 | D | 1,611 | 982 | 2,624 | |
| 1916 | D | 1,402 | 425 | 1,932 | |
| 1912 | D | 936 | 145 | 1,618 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Eddy County's economy is anchored by Permian Basin petroleum extraction, and its rural, resource-industry workforce has delivered Republican presidential margins exceeding 50 points in recent cycles, making it one of the state's most reliably one-sided counties.
The unraveling was not abrupt. The Democratic margin in Eddy County peaked at sixty-two points in 1932; it narrowed steadily over the late twentieth century. The 2000 election delivered the county to the Republican party for the first time in many years, by a margin of eighteen points. By 2024, the margin had widened further.
The economic and demographic context is severe. Eddy County's median household income of $78,426 is among the lowest of any county in the United States; 14% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Logan County and Atchison County.