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County · New Jersey

Middlesex County

Middlesex County

Middlesex County is a county located in the U.S. state of New Jersey, extending inland from the Raritan Valley region to the northern portion of the Jersey Shore. As of the 2020 United States census, the county was the state's third-most populous county with a population of 863,162, its highest decennial count ever and an increase of 53,304 (+6.6%) from the 2010 census count of 809,858, which in turn reflected an increase of 59,696 (8.0%) from the 750,162 counted in the 2000 census. The United States Census Bureau's Population Estimates Program estimated a 2025 population of 883,335, an increase of 20,173 (+2.3%) from the 2020 decennial census. Middlesex County is part of the New York metropolitan area. Many communities within the county serve as commuter towns to and from New York City and other points north. The county is part of the Central Jersey region of the state.

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860,807 population (2021) · County area: Middlesex · Official website

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Cities and towns 15

Townships 10

Reference data (Census of Governments 2022)
Census ID (PID6)
170104
FIPS state
34
FIPS county
023
FIPS place
99023
Census record name
COUNTY OF MIDDLESEX
Mailing address
75 BAYARD ST, NEW BRUNSWICK 08901