| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 3,179 | 10,528 | 13,986 | |
| 2020 | R | 3,236 | 10,686 | 14,209 | |
| 2016 | R | 2,802 | 9,642 | 13,185 | |
| 2012 | R | 3,806 | 8,937 | 13,032 | |
| 2008 | R | 4,928 | 8,404 | 13,513 | |
| 2004 | R | 3,512 | 9,734 | 13,340 | |
| 2000 | R | 3,775 | 8,555 | 12,590 | |
| 1996 | R | 4,247 | 6,960 | 12,637 | |
| 1992 | R | 3,708 | 6,078 | 12,708 | |
| 1988 | R | 3,811 | 8,137 | 11,997 | |
| 1984 | R | 3,923 | 7,958 | 11,952 | |
| 1980 | R | 4,673 | 6,368 | 11,978 | |
| 1976 | R | 4,908 | 6,280 | 11,306 | |
| 1972 | R | 3,971 | 7,549 | 11,572 | |
| 1968 | R | 4,667 | 5,774 | 11,259 | |
| 1964 | D | 6,637 | 4,230 | 10,973 | |
| 1960 | R | 4,338 | 6,972 | 11,409 | |
| 1956 | R | 3,520 | 7,079 | 10,708 | |
| 1952 | R | 3,744 | 6,204 | 10,408 | |
| 1948 | R | 4,640 | 4,832 | 9,645 | |
| 1944 | R | 3,804 | 5,648 | 9,601 | |
| 1940 | R | 4,382 | 5,247 | 9,730 | |
| 1936 | D | 5,822 | 3,249 | 9,208 | |
| 1932 | D | 5,892 | 2,910 | 8,913 | |
| 1928 | D | 4,066 | 4,045 | 8,139 | |
| 1924 | D | 4,300 | 3,330 | 8,055 | |
| 1920 | R | 3,653 | 4,144 | 7,998 | |
| 1916 | D | 2,875 | 1,796 | 4,876 | |
| 1912 | D | 2,961 | 917 | 4,805 | |
| 1908 | D | 3,404 | 1,726 | 5,289 | |
| 1904 | D | 2,973 | 1,967 | 5,187 | |
| 1900 | D | 3,337 | 1,688 | 5,126 | |
| 1896 | D | 3,340 | 1,613 | 5,026 | |
| 1892 | D | 2,906 | 1,247 | 4,467 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Adams County's Amish and conservative Mennonite communities anchor a demographic profile that has produced Republican presidential margins exceeding 50 points in recent cycles, making it among the most one-sided counties in the state.
The Republican margin in Adams County reached its widest at fifty-three points in 2024. The margin in 2024 was fifty-three points, in line with the county's deep historical pattern.
Adams County's loyalty is rooted in its place. Median household income of $65,289, a 94% non-Hispanic-white share, and a population of 36,227 together describe a community whose political habits are deeply settled. The county's voting pattern over the last decade is most similar to that of Wells County and Lycoming County.
