| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 78,708 | 83,326 | 165,263 | |
| 2020 | D | 86,702 | 83,340 | 171,658 | |
| 2016 | R | 66,870 | 67,544 | 141,254 | |
| 2012 | D | 74,013 | 59,456 | 135,570 | |
| 2008 | D | 77,267 | 60,315 | 139,430 | |
| 2004 | D | 66,835 | 60,033 | 127,964 | |
| 2000 | D | 61,095 | 42,315 | 107,298 | |
| 1996 | D | 51,915 | 32,116 | 100,495 | |
| 1992 | D | 42,425 | 37,335 | 104,619 | |
| 1988 | R | 35,479 | 51,708 | 88,117 | |
| 1984 | R | 32,702 | 54,041 | 87,050 | |
| 1980 | R | 29,804 | 40,306 | 78,903 | |
| 1976 | D | 38,726 | 34,888 | 75,302 | |
| 1972 | R | 25,509 | 44,806 | 71,209 | |
| 1968 | R | 27,438 | 30,596 | 68,731 | |
| 1964 | D | 40,305 | 23,702 | 64,052 | |
| 1960 | R | 29,752 | 32,474 | 62,259 | |
| 1956 | R | 20,007 | 30,646 | 50,728 | |
| 1952 | R | 20,536 | 25,103 | 45,737 | |
| 1948 | R | 15,785 | 19,477 | 35,765 | |
| 1944 | D | 17,758 | 16,684 | 34,555 | |
| 1940 | D | 20,284 | 17,674 | 38,111 | |
| 1936 | D | 20,516 | 15,813 | 36,622 | |
| 1932 | R | 13,817 | 18,782 | 33,561 | |
| 1928 | R | 6,594 | 25,627 | 32,302 | |
| 1924 | R | 4,167 | 15,513 | 21,328 | |
| 1920 | R | 4,869 | 11,693 | 17,557 | |
| 1916 | R | 3,745 | 5,352 | 9,762 | |
| 1912 | D | 3,364 | 1,856 | 8,786 | |
| 1908 | R | 3,707 | 5,318 | 9,434 | |
| 1904 | R | 2,818 | 4,829 | 8,152 | |
| 1900 | R | 2,829 | 4,471 | 7,763 | |
| 1896 | R | 2,981 | 4,727 | 8,009 | |
| 1892 | R | 3,529 | 3,748 | 7,519 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Gloucester County sits in Philadelphia's outer orbit, where a mix of working-class townships and newer residential developments has shifted its presidential margins from double-digit Democratic leads to narrow Republican ones over the past decade.
The Democratic margin in Gloucester County has rarely exceeded twenty-six points in modern history; the Republican margin has rarely exceeded fifty-nine points. 2024 delivered the county to the Republican candidate by three points.
Gloucester County's demographics resemble the country more than they resemble most counties. A 76% non-Hispanic-white share, a 8% poverty rate, and a median household income of $105,115 — all within the broad national range. The county's voting pattern over the last decade is most similar to that of Atlantic County and Nassau County.
