| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 43,779 | 50,243 | 97,158 | |
| 2020 | R | 43,824 | 47,504 | 94,266 | |
| 2016 | R | 33,366 | 41,476 | 78,202 | |
| 2012 | R | 28,236 | 39,688 | 70,460 | |
| 2008 | R | 29,021 | 37,963 | 68,380 | |
| 2004 | R | 27,597 | 35,726 | 64,103 | |
| 2000 | R | 21,425 | 28,231 | 51,459 | |
| 1996 | D | 20,419 | 19,476 | 43,967 | |
| 1992 | D | 22,029 | 20,292 | 47,880 | |
| 1988 | R | 12,557 | 23,601 | 36,658 | |
| 1984 | R | 11,319 | 24,993 | 36,698 | |
| 1980 | R | 12,276 | 20,788 | 35,421 | |
| 1976 | D | 15,610 | 14,132 | 29,834 | |
| 1972 | R | 7,108 | 17,523 | 24,701 | |
| 1968 | R | 6,131 | 10,640 | 21,863 | |
| 1964 | D | 10,166 | 6,856 | 17,070 | |
| 1960 | R | 5,391 | 10,088 | 15,679 | |
| 1956 | R | 4,857 | 7,683 | 12,623 | |
| 1952 | R | 4,923 | 8,650 | 13,611 | |
| 1948 | D | 3,493 | 2,859 | 7,074 | |
| 1944 | D | 3,089 | 3,084 | 6,201 | |
| 1940 | D | 2,873 | 1,819 | 4,750 | |
| 1936 | D | 3,378 | 1,579 | 4,977 | |
| 1932 | D | 4,971 | 1,502 | 6,596 | |
| 1928 | R | 2,395 | 3,132 | 5,567 | |
| 1924 | D | 2,281 | 1,466 | 4,083 | |
| 1920 | D | 2,637 | 2,118 | 4,879 | |
| 1916 | D | 2,922 | 1,625 | 4,547 | |
| 1912 | D | 1,881 | 565 | 3,137 | |
| 1908 | D | 2,748 | 1,704 | 4,709 | |
| 1904 | D | 1,978 | 1,369 | 3,536 | |
| 1900 | D | 2,658 | 1,347 | 4,132 | |
| 1896 | D | 3,208 | 1,197 | 4,445 | |
| 1892 | D | 2,457 | 1,871 | 4,612 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Washington County's large university-town population keeps its presidential margins closer than most of Arkansas, swinging between single-digit Republican advantages and occasional Democratic competitiveness over the past two decades.
The shift began with civil rights. 2000 marked the realignment in Washington County, by a thirteen points margin. The Republican margin reached its widest at forty-two points in 1972. The 2024 margin was seven points.
The political shift has tracked, in Washington County, the political shift of the South more broadly. A 63% non-Hispanic-white share, a median household income of $70,639, and a 15% poverty rate describe the demographic context. The county's voting pattern over the last decade is most similar to that of Madison County and Hamilton County.
