Jersey City is a city in Hudson County, New Jersey, United States. As of the United States 2000 Census, the population of Jersey City was 240,055, making it New Jersey's second-largest city, behind Newark. As of the Census Bureau's 2006 estimate the population had grown to 241,791. It is the seat of Hudson County.

Jersey City lies on the west bank of the Hudson River across from Lower Manhattan in New York City, and is part of the New York metropolitan area. A commercial and industrial center, it is a port of entry and a manufacturing center. With 11 miles (17.7 km) of waterfront and significant rail connections, Jersey City is an important transportation terminus and distribution center. It has railroad shops, oil refineries, warehouses, and plants that manufacture a diverse assortment of products, including chemicals, petroleum, electronics, textiles, and cosmetics. Jersey City has benefited from its location near the island of Manhattan, as many of its companies are extensions of businesses whose headquarters are there. Recent developments have included increased housing and shopping areas; some parts of the city, however, remain run-down after years of commercial inactivity.