| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 6,743 | 5,081 | 11,928 | |
| 2020 | D | 7,917 | 5,696 | 13,759 | |
| 2016 | D | 7,757 | 5,874 | 13,836 | |
| 2012 | D | 9,061 | 6,293 | 15,447 | |
| 2008 | D | 9,021 | 6,566 | 15,696 | |
| 2004 | D | 8,423 | 6,996 | 15,479 | |
| 2000 | D | 8,065 | 6,691 | 14,879 | |
| 1996 | D | 8,218 | 5,378 | 14,421 | |
| 1992 | D | 8,255 | 5,831 | 15,877 | |
| 1988 | R | 7,732 | 8,116 | 15,994 | |
| 1984 | R | 7,849 | 9,440 | 17,378 | |
| 1980 | R | 7,228 | 7,523 | 15,363 | |
| 1976 | D | 6,619 | 6,431 | 13,861 | |
| 1972 | R | 3,697 | 8,500 | 12,657 | |
| 1968 | D | 5,214 | 1,475 | 13,501 | |
| 1964 | R | 1,093 | 5,900 | 6,993 | |
| 1960 | D | 1,452 | 1,227 | 5,205 | |
| 1956 | R | 1,279 | 1,664 | 4,094 | |
| 1952 | R | 1,697 | 2,372 | 4,069 | |
| 1948 | R | 71 | 95 | 2,200 | |
| 1944 | D | 1,638 | 282 | 1,920 | |
| 1940 | D | 1,869 | 166 | 2,036 | |
| 1936 | D | 1,732 | 124 | 1,860 | |
| 1932 | D | 1,420 | 384 | 1,819 | |
| 1928 | D | 1,337 | 840 | 2,177 | |
| 1924 | D | 836 | 304 | 1,156 | |
| 1920 | D | 642 | 114 | 759 | |
| 1916 | D | 671 | 42 | 714 | |
| 1912 | D | 491 | 31 | 763 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | D | 500 | 113 | 623 | |
| 1896 | D | 507 | 174 | 715 | |
| 1892 | D | 474 | 82 | 580 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Adams County, home to Natchez, carries one of Mississippi's highest shares of Black residents—roughly 70%—which consistently produces Democratic margins in a state that trends heavily Republican statewide.
The Democratic margin in Adams County reached its widest at eighty-eight points in 1916. The margin in 2024 was fourteen points — still decisive.
Adams County's loyalty is rooted in its place. Median household income of $43,644, a 38% non-Hispanic-white share, and a population of 28,803 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 Thurston County and Pierce County.
