what county long branch nj in
West Long Branch, New Jersey. West Long Branch is a borough in Monmouth County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 8,097, reflecting a decline of 161 (-1.9%) from the 8,258 counted in the 2000 Census, which had in turn increased by 568 (+7.4%) from the 7,690 counted in the 1990 Census.