| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 4,443 | 7,763 | 12,882 | |
| 2020 | R | 4,329 | 7,362 | 11,818 | |
| 2016 | R | 3,745 | 5,966 | 10,130 | |
| 2012 | D | 5,542 | 4,644 | 10,287 | |
| 2008 | D | 5,806 | 3,974 | 9,986 | |
| 2004 | D | 5,447 | 4,890 | 10,456 | |
| 2000 | D | 4,826 | 3,920 | 9,116 | |
| 1996 | D | 4,119 | 2,450 | 7,824 | |
| 1992 | D | 3,539 | 2,465 | 8,048 | |
| 1988 | D | 3,598 | 3,258 | 6,883 | |
| 1984 | R | 2,714 | 3,645 | 6,411 | |
| 1980 | R | 2,773 | 3,304 | 6,518 | |
| 1976 | D | 3,089 | 2,377 | 5,588 | |
| 1972 | R | 1,833 | 2,200 | 4,137 | |
| 1968 | R | 1,614 | 1,691 | 3,774 | |
| 1964 | D | 2,262 | 1,219 | 3,489 | |
| 1960 | R | 1,551 | 2,109 | 3,674 | |
| 1956 | R | 1,244 | 1,854 | 3,117 | |
| 1952 | R | 1,180 | 2,259 | 3,457 | |
| 1948 | D | 1,419 | 1,259 | 2,761 | |
| 1944 | R | 1,478 | 1,579 | 3,072 | |
| 1940 | D | 1,883 | 1,818 | 3,730 | |
| 1936 | D | 2,289 | 1,191 | 3,579 | |
| 1932 | D | 2,120 | 777 | 2,949 | |
| 1928 | R | 914 | 1,624 | 2,580 | |
| 1924 | R | 173 | 779 | 2,687 | |
| 1920 | R | 392 | 1,528 | 2,007 | |
| 1916 | R | 824 | 957 | 1,871 | |
| 1912 | R | 462 | 689 | 1,495 | |
| 1908 | R | 436 | 1,167 | 1,692 | |
| 1904 | R | 273 | 1,399 | 1,751 | |
| 1900 | R | 409 | 1,513 | 1,953 | |
| 1896 | R | 391 | 1,432 | 1,866 | |
| 1892 | R | 402 | 972 | 1,411 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Adams County's economy centers on tourism and agriculture around its many glacial lakes, and its largely white, working-class electorate has moved roughly 20 points toward Republican presidential candidates since 2004.
The county's recent history is a story of close margins. The Democratic margin reached forty-six points in 1932; the Republican margin reached sixty-four points in 1904. Most other elections have been decided by single-digit points.
Adams County's demographics — a population of 21,123, a 89% non-Hispanic-white share, a median household income of $59,442 — 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 Mercer County and Henderson County.
