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Rumson is a borough in Monmouth County, in the U.S. state of New Jersey, and is part of the New York Metropolitan Area. As of the 2020 United States census, the borough's population was 7,343, an increase of 221 (+3.1%) from the 2010 census count of 7,122, which in turn reflected a decline of 15 (−0.2%) from 7,137 in 2000.
Source: Wikipedia