is a Township in Monmouth County, New Jersey, United States. As of the United States 2000 Census, the township population was 21,378.
by an Act of the New Jersey Legislature on February 25, 1848, from portions of Middletown Township. Portions of the township were taken to form Holmdel Township (February 23, 1857), Matawan Township (also February 23, 1857, now Aberdeen Township), Keyport (March 17, 1870), Keansburg (March 26, 1917) and Union Beach (March 16, 1925). The township was renamed
as of November 28, 1967, based on the results of a referendum held on November 7, 1967. Hazlet derived its name from a Dr. John Hazlett who had an estate in Raritan Township near the Keyport-Holmdel Turnpike, now Holmdel Road.
Hazlet is part of the Bayshore Regional Strategic Plan, an effort by nine municipalities in northern Monmouth County to reinvigorate the area's economy by emphasizing the traditional downtowns, dense residential neighborhoods, maritime history, and the natural beauty of the Raritan Bayshore coastline.
According to the United States Census Bureau, the township has a total area of 5.7 square miles (14.7 km²), of which, 5.6 square miles (14.6 km²) of it is land and 0.04 square miles (0.1 km²) of it (0.71%) is water. As the crow flies, Hazlet Township is roughly 37 miles south of New York City and 56 miles northeast of Philadelphia, Pennsylvania.