Essex County, New Jersey: History
=== Etymology ===
The county is named after Essex, a county in the East of England.
Essex was originally formed as one of four administrative districts within Province of East Jersey in 1675, together with Bergen, Middlesex and Monmouth districts. Essex County was formed within East Jersey on March 7, 1683. The county was named after the English county of Essex. When the provinces of East Jersey and West Jersey were combined in 1702, the county boundaries were retained. Portions of Essex were taken in 1741 and transferred to Somerset County. In 1837, Passaic County was formed from portions of Essex and Bergen counties. In 1857, Union County was created from parts of Essex County.
The municipalities of western Essex County have discussed secession from the county, to create a new county or be annexed to Morris County, spurred mainly by a belief that tax policy benefits the poorer, urban, eastern portions of the county at the expense of the wealthier, more suburban municipalities in the west of the county. From 2001 to 2003, Millburn, Montclair and Roseland all held nonbinding ballot referendums on the issue. Then-Montclair mayor Robert J. Russo gave a statement in 2003 about secession, "I've watched Essex County burden our people, with very little to show for it. We're fiscally conservative here and socially progressive – and we're finally rebelling."