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New Jersey County Map

Showing county seats, present boundaries and dates of formation

map of NJ Counties and County Seats

 

COUNTY DATE FORMED COUNTY SEAT

HISTORICAL DATA

Atlantic

1837

Mays Landing

Formed from Gloucester County.

Bergen

1683

Hackensack

Original county in East Jersey; Passaic County set off, 1837; Hudson County set off, 1840.

Burlington

1681

Mount Holly

Original county in West Jersey--court established 1681; boundary set with Gloucester County, 1692; Hunterdon County set off, 1714; part of Mercer County formed from Burlington, 1838.

Camden

1844

Camden

Formed from Gloucester County.

Cape May

1685

Cape May
Court House

Original county in West Jersey--court established 1685; boundaries set 1692

Cumberland

1748

Bridgeton

Formed from Salem County.

Essex

1683

Newark

Original county in East Jersey; part of Passaic County formed from Essex, 1837; Union County set off, 1857.

Gloucester

1686

Woodbury

Original county in West Jersey--court established 1686; boundary set with Burlington County, 1692; Atlantic County set off, 1837; Camden County set off, 1844.

Hudson

1840

Jersey City

Formed from Bergen County.

Hunterdon

1714

Flemington

Formed from Burlington County; Morris County set off, 1739; part of Mercer County formed from Hunterdon, 1838.

Mercer

1838

Trenton

Formed from Burlington, Hunterdon, Middlesex and Somerset Counties.

Middlesex

1683

New Brunswick

Original county in East Jersey; Somerset County set off, 1688; part of Mercer County formed from Middlesex, 1838.

Monmouth

1683

Freehold

Original county in East Jersey; Ocean County set off, 1850.

Morris

1739

Morristown

Formed from Hunterdon County; Sussex County set off, 1753.

Ocean

1850

Toms River

Formed from Monmouth County.

Passaic

1837

Paterson

Formed from Bergen and Essex Counties.

Salem

1681

Salem

Original county in West Jersey--court established 1681; formed from Salem Tenth, 1694; Cumberland set off, 1748.

Somerset

1688

Somerville

Formed from Middlesex County.

Sussex

1753

Newton

Formed from Morris County; Warren County set off, 1824.

Union

1857

Elizabeth

Formed from Essex County.

Warren

1824

Belvidere

Formed from Sussex County.