Mendham Borough is a borough in Morris County, New Jersey, in the United States. As of the 2010 United States Census, the borough's population was 4,981, reflecting a decline of 116 from the 5,097 counted in the 2000 Census, which had in turn increased by 207 from the 4,890 counted in the 1990 Census. Located in the Raritan Valley region within the New York Metropolitan area, the North Branch of the Raritan River begins in Mendham Borough and flows... Show more

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