Jersey City is the second-most populous city in the U.S. state of New Jersey, after Newark. It is the county seat of Hudson County, the county's most populous city and its largest by area. As of the 2020 United States census, the city's population was 292,449, an increase of 44,852 (+18.1%) from the 2010 census count of 247,597. As of 2020, more than 40 languages are spoken in over 52% of households, and 42.5% of residents were born outside the United States making the city the most ethnically diverse in the United States.