Passaic County borders New York State on the north and is surrounded on the other sides by Sussex, Morris, Essex and Bergen counties in New Jersey.  Passaic County has 186 square miles of land area, making it the 18th in size among New Jersey’s counties.  

Passaic County has 16 municipalities.  West Milford Township, at the northern tip of Passaic County, is the largest in size with 78.30 square miles of land.  The Borough of Prospect Park is the smallest with .45 square miles of land.

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