| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 334,784 | 42,838 | 388,993 | |
| 2020 | D | 379,208 | 37,090 | 424,855 | |
| 2016 | D | 344,049 | 32,811 | 386,149 | |
| 2012 | D | 347,938 | 35,734 | 387,744 | |
| 2008 | D | 332,396 | 38,833 | 374,026 | |
| 2004 | D | 260,532 | 55,532 | 318,474 | |
| 2000 | D | 216,119 | 49,987 | 271,909 | |
| 1996 | D | 176,612 | 52,697 | 240,302 | |
| 1992 | D | 168,691 | 62,955 | 256,859 | |
| 1988 | D | 133,816 | 86,545 | 222,881 | |
| 1984 | D | 136,063 | 95,121 | 232,220 | |
| 1980 | D | 98,757 | 78,977 | 193,987 | |
| 1976 | D | 111,743 | 81,027 | 192,770 | |
| 1972 | R | 79,914 | 116,166 | 198,410 | |
| 1968 | R | 71,524 | 73,269 | 177,660 | |
| 1964 | D | 81,806 | 46,413 | 128,219 | |
| 1960 | D | 62,013 | 44,817 | 106,830 | |
| 1956 | R | 39,280 | 40,654 | 79,934 | |
| 1952 | R | 29,119 | 38,060 | 67,602 | |
| 1948 | D | 14,874 | 14,718 | 30,024 | |
| 1944 | D | 14,006 | 13,750 | 27,756 | |
| 1940 | D | 16,592 | 9,523 | 26,251 | |
| 1936 | D | 15,087 | 8,107 | 23,295 | |
| 1932 | D | 11,580 | 6,696 | 18,556 | |
| 1928 | R | 6,658 | 9,782 | 16,562 | |
| 1924 | R | 5,088 | 5,868 | 12,490 | |
| 1920 | R | 4,857 | 6,628 | 11,663 | |
| 1916 | D | 3,493 | 3,058 | 6,734 | |
| 1912 | D | 5,397 | 1,456 | 5,341 | |
| 1908 | D | 5,139 | 2,680 | 78 | |
| 1904 | D | 6,279 | 2,845 | 24 | |
| 1900 | R | 2,787 | 3,455 | 11 | |
| 1896 | R | 2,505 | 3,250 | 5,810 | |
| 1892 | D | 2,655 | 2,423 | 5,121 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Prince George's County delivers some of Maryland's largest raw Democratic margins, driven by its majority African American population and proximity to Washington, D.C. Its suburbs have grown rapidly, adding younger, college-educated residents to an already heavily blue electorate.
The Democratic margin in Prince George's County has been steady. It reached its modern peak at 100 points in 1904; the 2024 margin was seventy-five points, still in line with the county's long pattern.
Prince George's County's political identity is inseparable from its demographic profile: a 12% non-Hispanic-white share, a median household income of $101,798, and the full diversity of a major metropolitan center. The county's voting pattern resembles other major urban centers most closely — Noxubee County and Petersburg city.
