| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 148,733 | 120,919 | 275,145 | |
| 2020 | D | 150,350 | 119,159 | 276,540 | |
| 2016 | D | 113,798 | 108,077 | 240,433 | |
| 2012 | R | 106,456 | 113,220 | 223,927 | |
| 2008 | D | 116,810 | 106,291 | 226,701 | |
| 2004 | R | 83,330 | 120,813 | 207,071 | |
| 2000 | R | 73,347 | 101,025 | 183,156 | |
| 1996 | R | 70,708 | 92,334 | 179,721 | |
| 1992 | R | 67,097 | 93,512 | 200,121 | |
| 1988 | R | 76,541 | 99,916 | 177,565 | |
| 1984 | R | 58,979 | 112,676 | 172,658 | |
| 1980 | R | 51,668 | 96,908 | 163,930 | |
| 1976 | R | 61,877 | 93,204 | 158,707 | |
| 1972 | R | 48,201 | 101,579 | 149,780 | |
| 1968 | R | 51,617 | 69,808 | 137,164 | |
| 1964 | D | 77,480 | 61,613 | 139,093 | |
| 1960 | R | 64,060 | 72,005 | 136,065 | |
| 1956 | R | 50,110 | 73,270 | 123,380 | |
| 1952 | R | 55,591 | 71,457 | 127,048 | |
| 1948 | D | 49,258 | 47,175 | 96,433 | |
| 1944 | D | 63,762 | 53,443 | 117,205 | |
| 1940 | D | 66,840 | 53,325 | 120,165 | |
| 1936 | D | 70,245 | 35,349 | 107,076 | |
| 1932 | D | 59,347 | 33,938 | 94,768 | |
| 1928 | R | 42,267 | 47,551 | 90,405 | |
| 1924 | R | 18,672 | 29,390 | 65,340 | |
| 1920 | R | 18,439 | 28,543 | 49,375 | |
| 1916 | D | 24,796 | 14,557 | 41,437 | |
| 1912 | D | 12,908 | 6,185 | 29,282 | |
| 1908 | D | 15,583 | 14,066 | 30,713 | |
| 1904 | R | 6,831 | 15,248 | 26,349 | |
| 1900 | R | 13,241 | 14,266 | 28,037 | |
| 1896 | R | 11,755 | 12,326 | 24,678 | |
| 1892 | D | 10,702 | 2,904 | 22,172 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Douglas County anchors Nebraska's lone Democratic-leaning congressional district and delivered a D+10.2 margin in 2024, making it the dominant counterweight to the state's otherwise heavily Republican rural vote.
The Democratic margin in Douglas County has rarely exceeded thirty-five points in modern history; the Republican margin has rarely exceeded thirty-six points. 2024 delivered the county to the Democratic candidate by ten points.
Douglas County's demographics resemble the country more than they resemble most counties. A 69% non-Hispanic-white share, a 12% poverty rate, and a median household income of $80,391 — all within the broad national range. The county's voting pattern over the last decade is most similar to that of Henry County and Frederick County.
