| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 3,355 | 3,866 | 7,313 | |
| 2020 | R | 3,368 | 3,697 | 7,152 | |
| 2016 | R | 2,869 | 3,523 | 6,645 | |
| 2012 | R | 3,149 | 3,753 | 6,961 | |
| 2008 | R | 3,235 | 3,647 | 6,938 | |
| 2004 | R | 2,477 | 3,724 | 6,230 | |
| 2000 | R | 1,937 | 3,411 | 5,455 | |
| 1996 | R | 1,844 | 2,709 | 4,893 | |
| 1992 | R | 1,812 | 2,841 | 5,528 | |
| 1988 | R | 1,551 | 3,380 | 5,043 | |
| 1984 | R | 1,559 | 3,416 | 5,044 | |
| 1980 | R | 1,567 | 2,780 | 4,557 | |
| 1976 | R | 1,581 | 2,381 | 4,074 | |
| 1972 | R | 658 | 1,675 | 2,391 | |
| 1968 | R | 1,134 | 1,640 | 3,650 | |
| 1964 | R | 904 | 1,065 | 1,975 | |
| 1960 | R | 895 | 1,340 | 2,250 | |
| 1956 | R | 373 | 1,380 | 1,953 | |
| 1952 | R | 753 | 1,228 | 1,997 | |
| 1948 | D | 560 | 459 | 1,174 | |
| 1944 | D | 666 | 390 | 1,061 | |
| 1940 | D | 711 | 317 | 1,036 | |
| 1936 | D | 689 | 322 | 1,014 | |
| 1932 | D | 639 | 272 | 927 | |
| 1928 | R | 315 | 520 | 835 | |
| 1924 | D | 564 | 90 | 668 | |
| 1920 | D | 404 | 138 | 546 | |
| 1916 | D | 461 | 58 | 522 | |
| 1912 | D | 479 | 82 | 584 | |
| 1908 | D | 468 | 122 | 600 | |
| 1904 | D | 350 | 93 | 450 | |
| 1900 | D | 971 | 508 | 1,486 | |
| 1896 | D | 1,073 | 599 | 1,692 | |
| 1892 | D | 983 | 896 | 1,895 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Lancaster sits at the tip of Virginia's Northern Neck peninsula, where a largely rural, retirement-age population has shifted the county steadily rightward over the past two decades, landing at R+7 in 2024.
The county's recent history is a story of close margins. The Democratic margin reached seventy-seven points in 1916; the Republican margin reached fifty-two points in 1956. Most other elections have been decided by single-digit points.
Lancaster County's demographics — a population of 10,936, a 69% non-Hispanic-white share, a median household income of $69,713 — situate the county close to national averages on several dimensions. The county's voting pattern over the last decade is most similar to that of Ada County and Fluvanna County.
