Tinton Falls is a borough in Monmouth County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 17,892, an increase of 2,839 (+18.9%) from the 15,053 counted in the 2000 Census, which had in turn increased by 2,692 (+21.8%) from the 12,361 counted in the 1990 Census.