Milltown is a borough in Middlesex County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 6,893, reflecting a decrease of 107 (-1.5%) from the 7,000 counted in the 2000 Census, which had in turn increased by 32 (+0.5%) from the 6,968 counted in the 1990 Census.
Milltown was incorporated as a borough by an act of the New Jersey Legislature on January 29, 1889, from portions of North Brunswick, based on the results of a referendum held three days earlier. The borough was reincorporated by resolution of the borough council on May 2, 1896. A portion of East Brunswick Township was annexed in 1902. Originally known as Bergen's Mill, named for Jacob I. Bergen who owned the grist mill, the name is believed to have become "Milltown" from residents "going to the mill in town".
As of the 2000 Census, the center of population for New Jersey was located in Milltown, at Milltown Road, just east of the New Jersey Turnpike (see map of location). Based on the results of the 2010 Census, the center of population had shifted to East Brunswick.
The groundbreaking anxiolytic and sedative drug Miltown (meprobamate) developed by Carter Products, which became available to the public in the mid-1950s, was named for the borough.
Long before the arrival of the first Europeans, the Lenape Native Americans had established settlements along the Lawrence Brook. The discovery of many artifacts in the area above today's municipal building (now a small county park) suggests the presence of a Native American settlement. In 1678, Thomas Lawrence, a New York baker, acquired a large area around the Lawrence Brook, which likely included today's Milltown. The Lawrence Brook was then called Piscopeek (and on later maps, Lawrence's Brook). The names and marks of several Native Americans (Quemareck, Quesiacs, Isarick, Metapis, Peckawan and Turantaca) appear on the bill of sale.