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Port Monmouth is an unincorporated community and census-designated place (CDP) in Middletown Township, situated on the Raritan Bayshore of northern Monmouth County, New Jersey, United States. At the 2020 United States census, the CDP's population was 3,745, a decrease of 73 (−1.9%) from the 2010 census count of 3,818.
Source: Wikipedia