| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 368 | 2,123 | 2,506 | |
| 2020 | R | 488 | 2,135 | 2,650 | |
| 2016 | R | 485 | 1,915 | 2,466 | |
| 2012 | R | 529 | 2,011 | 2,554 | |
| 2008 | R | 719 | 2,969 | 3,713 | |
| 2004 | R | 389 | 2,375 | 2,773 | |
| 2000 | R | 447 | 2,274 | 2,744 | |
| 1996 | R | 676 | 2,042 | 2,888 | |
| 1992 | R | 637 | 1,829 | 3,033 | |
| 1988 | R | 764 | 2,061 | 2,839 | |
| 1984 | R | 567 | 2,524 | 3,102 | |
| 1980 | R | 707 | 2,640 | 3,398 | |
| 1976 | D | 1,914 | 1,487 | 3,417 | |
| 1972 | R | 495 | 2,304 | 2,823 | |
| 1968 | R | 833 | 1,539 | 3,102 | |
| 1964 | D | 1,556 | 1,216 | 2,779 | |
| 1960 | R | 1,090 | 1,674 | 2,786 | |
| 1956 | D | 1,362 | 1,028 | 2,404 | |
| 1952 | R | 663 | 1,503 | 2,166 | |
| 1948 | D | 1,091 | 280 | 1,421 | |
| 1944 | D | 810 | 415 | 1,384 | |
| 1940 | D | 1,062 | 370 | 1,435 | |
| 1936 | D | 936 | 135 | 1,078 | |
| 1932 | D | 1,154 | 148 | 1,319 | |
| 1928 | R | 315 | 620 | 943 | |
| 1924 | D | 214 | 91 | 341 | |
| 1920 | D | 189 | 140 | 341 | |
| 1916 | D | 194 | 64 | 274 | |
| 1912 | D | 107 | 6 | 180 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Parmer County's flat, agricultural High Plains landscape anchors an economy built on feedlots, dairy, and crop farming, and its small, predominantly rural population has delivered Republican presidential margins above 70 points in recent cycles.
The unraveling was not abrupt. The Democratic margin in Parmer County peaked at seventy-six points in 1932; it narrowed steadily over the late twentieth century. The 1980 election delivered the county to the Republican party for the first time in many years, by a margin of fifty-seven points. By 2024, the margin had widened further.
The economic and demographic context is severe. Parmer County's median household income of $69,735 is among the lowest of any county in the United States; 10% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Moore County and Deaf Smith County.