Elizabeth is both Union County's main city and county seat in New Jersey, USA. The town has a total population of 124,969, maintaining its position as the fourth most populous city in New Jersey, behind Paterson. In 2008, Popular Science magazine called Elizabeth one of "America's 50 Greenest Towns," the only selected town in New Jersey. It has a total area of 13,464 square kilometres, comprising 12,319 square kilometers of land and 1,145 square kilometres.