thumb|Countys von New Jersey thumb|Lage von New Jersey in den USA Der US-Bundesstaat New Jersey gliedert sich in 21 Countys.
Nr. *CountyEinwohner 1. Juli 2017Einwohner Zensus 2010Verwaltungssitz1Atlantic269.918274.540Mays Landing2Bergen948.406905.147Hackensack3Burlington448.596448.738Mount Holly4Camden510.719513.668Camden5Cape May93.55397.265Cape May Court House6Cumberland152.538156.628Bridgeton7Essex808.285783.999Newark8Gloucester292.206288.585Woodbury9Hudson691.643634.244Jersey City10Hunterdon125.059127.364Flemington11Mercer374.733367.517Trenton12Middlesex842.798809.864New Brunswick13Monmouth626.351630.423Freehold14Morris499.693492.315Morristown15Ocean597.943576.548Toms River16Passaic512.607501.622Paterson17Salem62.79266.069Salem18Somerset335.432323.428Somerville19Sussex141.682148.886Newton20Union563.892536.448Elizabeth21Warren106.798108.655Belvidere
* Nummerierung erfolgt lt. Darstellung auf der Karte
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