| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 3,388 | 8,080 | 11,583 | |
| 2020 | R | 3,260 | 7,320 | 10,736 | |
| 2016 | R | 2,760 | 5,975 | 9,146 | |
| 2012 | R | 3,344 | 5,466 | 8,923 | |
| 2008 | R | 3,344 | 4,966 | 8,388 | |
| 2004 | R | 2,436 | 4,397 | 6,872 | |
| 2000 | R | 2,125 | 3,547 | 5,769 | |
| 1996 | R | 1,765 | 2,346 | 4,469 | |
| 1992 | R | 1,822 | 2,591 | 5,230 | |
| 1988 | R | 1,561 | 2,735 | 4,349 | |
| 1984 | R | 1,448 | 2,803 | 4,284 | |
| 1980 | R | 1,446 | 2,036 | 3,601 | |
| 1976 | R | 1,501 | 1,597 | 3,156 | |
| 1972 | R | 708 | 1,033 | 1,772 | |
| 1968 | R | 764 | 1,046 | 2,431 | |
| 1964 | D | 1,085 | 644 | 1,729 | |
| 1960 | R | 745 | 793 | 1,549 | |
| 1956 | R | 357 | 887 | 1,427 | |
| 1952 | R | 533 | 730 | 1,272 | |
| 1948 | D | 476 | 348 | 971 | |
| 1944 | D | 718 | 280 | 998 | |
| 1940 | D | 697 | 235 | 932 | |
| 1936 | D | 696 | 211 | 910 | |
| 1932 | D | 612 | 177 | 804 | |
| 1928 | D | 431 | 329 | 760 | |
| 1924 | D | 372 | 148 | 533 | |
| 1920 | D | 353 | 176 | 535 | |
| 1916 | D | 342 | 119 | 461 | |
| 1912 | D | 305 | 69 | 439 | |
| 1908 | D | 276 | 228 | 508 | |
| 1904 | D | 304 | 195 | 503 | |
| 1900 | R | 462 | 871 | 1,344 | |
| 1896 | R | 592 | 990 | 1,593 | |
| 1892 | R | 672 | 844 | 1,560 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
King William sits along the Pamunkey River northeast of Richmond, with a population under 14,000 and presidential margins that have exceeded 35 points Republican in each of the last three cycles, reflecting its deeply rural, low-density character.
The shift began with civil rights. 1968 marked the realignment in King William County, by a twelve points margin. The Republican margin reached its widest at forty-one points in 2024. The 2024 margin was forty-one points.
The political shift has tracked, in King William County, the political shift of the South more broadly. A 78% non-Hispanic-white share, a median household income of $86,056, and a 6% poverty rate describe the demographic context. The county's voting pattern over the last decade is most similar to that of Van Wert County and Clinton County.
