| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 95,156 | 100,954 | 203,351 | |
| 2020 | D | 129,097 | 92,009 | 222,209 | |
| 2016 | D | 116,759 | 72,902 | 196,228 | |
| 2012 | D | 115,926 | 64,523 | 182,214 | |
| 2008 | D | 113,257 | 72,552 | 187,395 | |
| 2004 | D | 94,962 | 75,200 | 171,311 | |
| 2000 | D | 90,324 | 61,043 | 156,573 | |
| 1996 | D | 85,879 | 53,594 | 152,951 | |
| 1992 | R | 70,030 | 71,147 | 164,888 | |
| 1988 | R | 66,254 | 88,070 | 157,513 | |
| 1984 | R | 69,590 | 101,951 | 174,940 | |
| 1980 | R | 61,486 | 82,531 | 158,951 | |
| 1976 | R | 76,194 | 85,102 | 166,226 | |
| 1972 | R | 62,302 | 108,511 | 174,923 | |
| 1968 | R | 74,442 | 79,862 | 172,657 | |
| 1964 | D | 113,919 | 63,114 | 179,699 | |
| 1960 | D | 90,950 | 80,853 | 179,402 | |
| 1956 | R | 61,859 | 101,182 | 166,676 | |
| 1952 | R | 70,727 | 89,083 | 164,190 | |
| 1948 | D | 60,147 | 59,675 | 130,430 | |
| 1944 | D | 68,737 | 67,856 | 137,182 | |
| 1940 | D | 69,880 | 65,523 | 135,907 | |
| 1936 | D | 71,384 | 49,046 | 122,190 | |
| 1932 | D | 54,576 | 49,218 | 109,404 | |
| 1928 | R | 47,167 | 57,708 | 105,834 | |
| 1924 | R | 11,644 | 43,384 | 69,599 | |
| 1920 | R | 11,873 | 42,692 | 59,225 | |
| 1916 | R | 13,340 | 18,754 | 33,904 | |
| 1912 | D | 10,810 | 5,349 | 30,531 | |
| 1908 | R | 11,961 | 17,635 | 31,511 | |
| 1904 | R | 11,532 | 17,705 | 30,948 | |
| 1900 | R | 12,891 | 15,619 | 29,483 | |
| 1896 | R | 9,280 | 15,437 | 26,247 | |
| 1892 | R | 10,992 | 11,527 | 23,147 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Passaic County's large Latino and working-class population in cities like Paterson has driven a notable rightward shift in recent cycles, turning a county that backed Clinton by double digits into a narrow Republican-leaning jurisdiction by 2024.
The Democratic margin in Passaic County has been steady. It reached its modern peak at twenty-eight points in 1964; the 2024 margin was three points, still in line with the county's long pattern.
Passaic County's political identity is inseparable from its demographic profile: a 41% non-Hispanic-white share, a median household income of $87,522, and the full diversity of a major metropolitan center. The county's voting pattern resembles other major urban centers most closely — Middlesex County and Imperial County.
