Municipal · New Jersey

Borough of South Plainfield

South Plainfield is a borough in northern Middlesex County, in the U.S. state of New Jersey. The borough is situated on the border with Union County in the Raritan Valley region, within the New York metropolitan area. As of the 2020 United States census, the borough's population was 24,338, its highest decennial count ever and an increase of 953 (+4.1%) from the 23,385 recorded at the 2010 census, which in turn reflected an increase of 1,575 (+7.2%) from the 21,810 counted in the 2000 census.

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Reference data (Census of Governments 2022)

Census ID (PID6): 170195
FIPS state: 34
FIPS county: 023
FIPS place: 69390
Census record name: BOROUGH OF SOUTH PLAINFIELD
Mailing address: 2480 PLAINFIELD AVE, SOUTH PLAINFIELD 07080