Milltown is a borough in Middlesex County, New Jersey with a population of 6,893 as of the 2010 census. It is situated on 1.596 square miles bordered by North Brunswick Township to the west and East Brunswick Township to the east. The Lawrence Brook, a tributary of the Raritan River, flows through the borough after exiting the Farrington Lake. The dam, under Main Street, creates a reservoir, the Mill Pond.

The borough has two major parks -- the 10-acre Borough Park across from the Parker School and the six-acre Albert Avenue Park on Albert Avenue. Among the amenities in borough park is a large, saucer-shaped municipal swimming pool.

Housing in Milltown primarily consists of a mix of 19th century bungalows, small three-bedroom colonials, postwar three-bedroom split-levels, and larger four-bedroom colonials on the more prestigious northern side of town.

The Milltown Public Schools serves students in public school for pre-kindergarten through eighth grade. As of the 2014-15 school year, the district and its two schools had an enrollment of 996 students and 56.1 classroom teachers, for a student–teacher ratio of 17.7:1. For ninth through twelfth grades, public school students attend Spotswood High School in Spotswood as part of a sending/receiving relationship with the Spotswood Public Schools, which also serves students from Helmetta.

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