what county in nj is jersey city?
Jersey City is the seat of Hudson County, New Jersey, and the second-largest city in New Jersey. According to the United States Census Bureau, the city had a total area of 21.080 square miles (54.596 km 2), including 14.794 square miles (38.316 km 2) of land and 6.286 square miles (16.281 km 2) of water (29.82%).