| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 224,596 | 83,908 | 313,283 | |
| 2020 | D | 266,820 | 75,475 | 343,591 | |
| 2016 | D | 240,837 | 63,176 | 312,884 | |
| 2012 | D | 237,035 | 64,767 | 304,071 | |
| 2008 | D | 240,306 | 74,063 | 316,183 | |
| 2004 | D | 203,681 | 83,374 | 289,348 | |
| 2000 | D | 185,505 | 66,842 | 259,573 | |
| 1996 | D | 175,368 | 65,162 | 254,196 | |
| 1992 | D | 158,130 | 89,146 | 276,858 | |
| 1988 | D | 156,098 | 111,491 | 276,967 | |
| 1984 | D | 173,295 | 136,798 | 314,543 | |
| 1980 | D | 145,281 | 117,222 | 287,166 | |
| 1976 | D | 174,434 | 133,911 | 315,812 | |
| 1972 | R | 161,270 | 170,036 | 338,888 | |
| 1968 | D | 185,440 | 140,084 | 357,095 | |
| 1964 | D | 277,042 | 116,172 | 396,477 | |
| 1960 | D | 217,878 | 167,848 | 393,623 | |
| 1956 | R | 146,313 | 234,682 | 388,253 | |
| 1952 | R | 180,501 | 219,863 | 407,635 | |
| 1948 | R | 155,468 | 166,963 | 343,567 | |
| 1944 | R | 174,320 | 178,989 | 360,742 | |
| 1940 | R | 154,363 | 182,124 | 344,034 | |
| 1936 | D | 174,857 | 140,991 | 319,441 | |
| 1932 | R | 132,666 | 149,630 | 290,772 | |
| 1928 | R | 118,268 | 168,856 | 288,514 | |
| 1924 | R | 41,708 | 123,614 | 186,673 | |
| 1920 | R | 40,970 | 116,168 | 163,848 | |
| 1916 | R | 34,596 | 54,167 | 91,439 | |
| 1912 | D | 26,250 | 16,994 | 80,601 | |
| 1908 | R | 30,191 | 53,687 | 87,004 | |
| 1904 | R | 25,452 | 50,508 | 79,863 | |
| 1900 | R | 25,735 | 45,318 | 73,294 | |
| 1896 | R | 20,509 | 42,587 | 65,525 | |
| 1892 | D | 30,176 | 29,044 | 60,324 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Essex County anchors New Jersey's urban core around Newark, delivering presidential margins above 40 points and a population density that makes it a reliable high-turnout anchor for statewide Democratic coalitions.
The Democratic margin in Essex County peaked at fifty-seven points in 2016. By 1976 the county had flipped, voting Republican for the first time in many years. The 2024 margin was forty-five points, the most Democratic-leaning result in the county's modern history.
The economic context is the key. Essex County's median household income of $80,789 sits well below state and national norms, and 15% of residents live below the federal poverty line. The shift here is part of a broader realignment of working-class places across the country. The county's voting pattern over the last decade is most similar to that of Cook County and Allendale County.
