| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 215 | 962 | 1,201 | |
| 2020 | R | 258 | 981 | 1,269 | |
| 2016 | R | 216 | 909 | 1,218 | |
| 2012 | R | 328 | 918 | 1,286 | |
| 2008 | R | 435 | 788 | 1,271 | |
| 2004 | R | 353 | 915 | 1,291 | |
| 2000 | R | 286 | 826 | 1,160 | |
| 1996 | R | 366 | 575 | 1,152 | |
| 1992 | R | 469 | 647 | 1,626 | |
| 1988 | R | 708 | 1,018 | 1,737 | |
| 1984 | R | 530 | 1,343 | 1,900 | |
| 1980 | R | 470 | 1,334 | 1,941 | |
| 1976 | D | 959 | 940 | 1,937 | |
| 1972 | R | 665 | 1,177 | 1,875 | |
| 1968 | R | 641 | 1,020 | 1,781 | |
| 1964 | D | 1,010 | 877 | 1,888 | |
| 1960 | R | 832 | 1,232 | 2,064 | |
| 1956 | R | 723 | 1,338 | 2,063 | |
| 1952 | R | 633 | 1,561 | 2,213 | |
| 1948 | R | 753 | 908 | 1,780 | |
| 1944 | R | 668 | 966 | 1,648 | |
| 1940 | R | 837 | 1,231 | 2,095 | |
| 1936 | D | 1,321 | 746 | 2,404 | |
| 1932 | D | 1,514 | 915 | 2,606 | |
| 1928 | R | 644 | 1,590 | 2,250 | |
| 1924 | R | 106 | 776 | 1,928 | |
| 1920 | R | 347 | 1,377 | 1,768 | |
| 1916 | D | 532 | 469 | 1,075 | |
| 1912 | D | 249 | 205 | 849 | |
| 1908 | R | 201 | 577 | 819 | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Adams County's 2024 presidential margin of R+62.2 reflects a pattern common to the rural Northern Plains: sparse population, an agricultural economy, and lopsided Republican performance that has held steady across recent cycles.
The Democratic margin in Adams County peaked at twenty-four points in 1936. By 1980 the county had flipped, voting Republican for the first time in many years. The 2024 margin was sixty-two points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Adams County's median household income of $62,500 sits well below state and national norms, and 15% of residents live below the federal poverty line. The shift here is part of a broader realignment of working-class places across the country. The county's voting pattern over the last decade is most similar to that of Pierce County and Lincoln County.