Elizabeth Township, also called Elizabethtown, was a township that existed in Essex County, in the U.S. state of New Jersey, from 1664 until 1855. The area was initially part of the Elizabethtown Tract, purchased from the Lenape on October 28, 1664. On March 13, 1855, the City of Elizabeth was created, combining and replacing both Elizabeth Township and Elizabeth Borough. With the creation of the City of Elizabeth, Elizabeth Township was dissolved.