Elizabeth is a city and the county seat of Union County, New Jersey, United States. As of the 2010 United States Census, the city had a total population of 124,969, retaining its ranking as New Jersey's fourth most populous city, after neighboring Newark, Jersey City, and Paterson. The population increased by 4,401 from the 120,568 counted in the 2000 Census, which had in turn increased by 10,566 from the 110,002 counted in the 1990 Census. For 2019, the Census Bureau's Population Estimates Program calculated a population of 129,216, an increase of 3.1% from the 2010 enumeration, ranking the city the 216th-most-populous in the country.
In 2008, Elizabeth was named one of "America's 50 Greenest Cities" by Popular Science magazine, the only city in New Jersey selected.