what county is colts neck nj in
Colts Neck Township, New Jersey. Colts Neck Township is a township in Monmouth County, New Jersey, United States. As of the 2010 United States Census, the population was 10,142, reflecting a decline of 2,189 (-17.8%) from the 12,331 counted in the 2000 Census, which had in turn increased by 3,772 (+44.1%) from the 8,559 counted in the 1990 Census.