| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 236,624 | 155,336 | 401,851 | |
| 2020 | D | 267,198 | 144,837 | 424,599 | |
| 2016 | D | 222,310 | 136,316 | 392,789 | |
| 2012 | D | 210,302 | 150,480 | 366,357 | |
| 2008 | D | 208,976 | 137,129 | 353,462 | |
| 2004 | D | 194,068 | 135,114 | 333,233 | |
| 2000 | D | 178,400 | 110,010 | 310,333 | |
| 1996 | D | 171,021 | 89,120 | 291,442 | |
| 1992 | D | 140,593 | 102,212 | 322,328 | |
| 1988 | D | 151,816 | 148,614 | 305,500 | |
| 1984 | R | 132,353 | 162,152 | 295,656 | |
| 1980 | R | 116,173 | 130,252 | 297,533 | |
| 1976 | D | 165,710 | 125,538 | 301,444 | |
| 1972 | D | 157,324 | 138,040 | 297,084 | |
| 1968 | D | 171,901 | 99,721 | 281,685 | |
| 1964 | D | 210,135 | 71,653 | 282,945 | |
| 1960 | D | 167,875 | 126,599 | 295,081 | |
| 1956 | R | 109,671 | 166,115 | 276,453 | |
| 1952 | R | 123,334 | 156,030 | 280,409 | |
| 1948 | D | 132,016 | 108,894 | 246,371 | |
| 1944 | D | 118,228 | 111,958 | 230,756 | |
| 1940 | D | 125,998 | 116,134 | 243,735 | |
| 1936 | D | 106,078 | 97,310 | 222,999 | |
| 1932 | R | 91,787 | 95,277 | 193,018 | |
| 1928 | R | 89,508 | 102,008 | 192,810 | |
| 1924 | R | 25,635 | 92,918 | 139,550 | |
| 1920 | R | 30,560 | 95,057 | 132,264 | |
| 1916 | R | 32,498 | 35,909 | 71,095 | |
| 1912 | R | 20,691 | 21,441 | 66,639 | |
| 1908 | R | 18,801 | 36,351 | 61,373 | |
| 1904 | R | 18,562 | 36,980 | 59,392 | |
| 1900 | R | 19,781 | 32,924 | 56,947 | |
| 1896 | R | 15,025 | 37,041 | 53,964 | |
| 1892 | R | 21,975 | 29,088 | 53,383 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Essex County stretches from the immigrant-heavy cities of Lawrence and Lynn to affluent coastal towns like Gloucester and Newburyport, producing a durable D+20 presidential margin driven more by urban concentration than suburban uniformity.
The Democratic margin in Essex County has been steady. It reached its modern peak at forty-nine points in 1964; the 2024 margin was twenty points, still in line with the county's long pattern.
Essex County's political identity is inseparable from its demographic profile: a 68% non-Hispanic-white share, a median household income of $101,883, and the full diversity of a major metropolitan center. The county's voting pattern resembles other major urban centers most closely — Norfolk County and Middlesex County.
