| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 46,240 | 23,996 | 71,153 | |
| 2020 | D | 42,809 | 25,451 | 69,097 | |
| 2016 | D | 31,005 | 24,817 | 58,123 | |
| 2012 | D | 28,441 | 26,241 | 55,379 | |
| 2008 | D | 27,825 | 26,812 | 55,083 | |
| 2004 | R | 15,997 | 25,846 | 42,124 | |
| 2000 | R | 11,162 | 18,893 | 30,964 | |
| 1996 | R | 9,631 | 14,495 | 26,477 | |
| 1992 | R | 8,869 | 13,349 | 26,657 | |
| 1988 | R | 5,086 | 13,493 | 18,678 | |
| 1984 | R | 4,371 | 12,428 | 16,799 | |
| 1980 | R | 6,807 | 6,945 | 14,238 | |
| 1976 | D | 7,805 | 3,959 | 11,764 | |
| 1972 | R | 982 | 6,610 | 7,592 | |
| 1968 | R | 1,242 | 1,848 | 7,249 | |
| 1964 | R | 2,501 | 3,315 | 5,816 | |
| 1960 | D | 2,576 | 1,136 | 3,712 | |
| 1956 | D | 2,111 | 1,001 | 3,112 | |
| 1952 | D | 2,102 | 645 | 2,747 | |
| 1948 | D | 1,336 | 1,019 | 3,346 | |
| 1944 | D | 828 | 280 | 1,108 | |
| 1940 | D | 833 | 195 | 1,033 | |
| 1936 | D | 1,015 | 237 | 1,255 | |
| 1932 | D | 1,013 | 57 | 1,087 | |
| 1928 | R | 452 | 606 | 1,058 | |
| 1924 | D | 355 | 86 | 575 | |
| 1920 | R | 427 | 475 | 902 | |
| 1916 | D | 416 | 61 | 555 | |
| 1912 | D | 266 | 18 | 591 | |
| 1908 | R | 152 | 181 | 525 | |
| 1904 | D | 230 | 133 | 644 | |
| 1900 | D | 345 | 300 | 738 | |
| 1896 | R | 463 | 641 | 1,121 | |
| 1892 | D | 467 | 234 | 1,194 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Douglas County's rapid population growth, fueled by Atlanta metro spillover, has redrawn its electoral map — the 2024 presidential margin of D+31.4 reflects a demographic transformation from its historically competitive past.
The 2008 election was the turning point, when the Democratic candidate carried the county by two points. The 2024 margin was thirty-one points, in line with the county's new direction.
The demographics suggest why. A population of 147,888, a 33% non-Hispanic-white share, and a median household income of $82,984 situate the county in the broader realignment patterns of recent cycles. The county's voting pattern over the last decade is most similar to that of Anne Arundel County and Rockdale County.
