Who We Are About NJTPA > Who We Are > Subregions Print Who we Serve: NJTPA Subregions Profiles include demographic and travel information as well as links to official web sites for each subregion. Overviews cover each subregion's involvement in the NJTPA, including links to transportation planning studies and projects funded through the NJTPA. Bergen County Essex County Newark Hudson County Jersey City Hunterdon County Middlesex County Monmouth County Morris County Ocean County Passaic County Somerset County Sussex County Union County Warren County Subregional Planning Activities