Elizabeth is a city in 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 largest city (by population) with an increase of 4,401 residents (an added 3.7%) from its 2000 Census population of 120,568. It is the county seat of Union County. In 2008, Elizabeth was named one of "America's 50 Greenest Cities" by Popular Science magazine, the only city in New Jersey selected. Elizabeth, originally called "Elizabethtown" and part of the Elizabethtown Tract, was founded in 1665 by English settlers. The town was not named for Queen Elizabeth I as many people may assume, but rather for Elizabeth, wife of Vice Admiral Sir George Carteret, 1st Baronet and one of the two original Proprietors of the colony of New Jersey. She was the daughter of Philippe de Carteret II, 3rd Seigneur de Sark and Anne Dowse. The town served as the first capital of New Jersey. During the American Revolutionary War, Elizabeth was continually attacked by British forces based on Manhattan and Staten Island. On March 13, 1855, the City of Elizabeth was created by an Act of the New Jersey Legislature, combining and replacing both Elizabeth Borough (which dated back to 1740) and Elizabeth Township (which had been formed in 1693), based on the results of a referendum held on March 27, 1855. On March 19, 1857, the city became part of the newly-created Union County. Portions of the city were taken to form Linden Township on March 4, 1861.