Middletown Township is a township in Monmouth County, New Jersey, United States. As of the United States 2000 Census had a total population of 66,327. Middletown is one of the oldest sites of European settlement in New Jersey.Middletown Township was originally formed on October 31, 1693, and was incorporated as a township by an Act of the New Jersey Legislature on February 21, 1798. Portions of the township were taken to form Atlantic Township (February 8, 1847, now Colts Neck Township), Raritan Township (February 25, 1848, now Hazlet Township), Atlantic Highlands (February 28, 1887), Highlands (March 22, 1900) and Keansburg (March 22, 1917)."The Story of New Jersey's Civil Boundaries: 1606-1968", John P. Snyder, Bureau of Geology and Topography; Trenton, New Jersey; 1969. p. 182.

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