New Jersey

New Jersey has 21 Counties.

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    • New Jersey Association of Counties
    150 West State Street
    Trenton, NJ 08608-1105
    Phone: (609) 394-3467
    Fax: (609)989-8567
    http://www.njac.org

    County NACo
    Member    		 2010
    Population    		 Square
    Miles    		 County Seat Board
    Size    		 Founded
    Atlantic 274,549 556 Mays Landing   9  1837 
    Bergen   905,116 233 Hackensack   7  1683 
    Burlington   448,734 799 Mount Holly   5  1694 
    Camden 513,657 221 Camden   7  1844 
    Cape May 97,265 251 Cape May Court House   5  1692 
    Cumberland   156,898 484 Bridgeton   7  1748 
    Essex   783,969 126 Newark   9  1683 
    Gloucester 288,288 322 Woodbury   7  1686 
    Hudson 634,266 46 Jersey City   9  1840 
    Hunterdon   128,349 428 Flemington   5  1714 
    Mercer 366,513 225 Trenton  7  1838 
    Middlesex   809,858 309 New Brunswick   7  1683 
    Monmouth   630,380 469 Freehold   5  1683 
    Morris   492,276 460 Morristown   7  1739 
    Ocean   576,567 629 Toms River   5  1850 
    Passaic   501,226 185 Paterson   7  1837 
    Salem   66,083 332 Salem  7  1694 
    Somerset 323,444 302 Somerville   5  1688 
    Sussex 149,265 519 Newton   5  1753 
    Union 536,499 103 Elizabeth   9  1857 
    Warren   108,692 357 Belvidere   3  1824