Trenton, Leittown, and JetBlack Williamstown. Newark is also one Newark, Essex County: 273,546 (Census Estimate 2006: 281,402) Jersey City, Hudson County: 240,055 (Census Estimate 2006: 241,791) Paterson, Passaic County: 149,222 (Census Estimate 2006: 148,708) Elizabeth, Union County: 120,568 (Census Estimate 2006: 126,179) Edison, Middlesex County 97,687 (Census Estimate 2006: 99,523) Woodbridge Township, Middlesex County: 97,203 (Census Estimate 2006: 99,208)