Ocean County is located in the U.S. state of New Jersey. It is the southernmost county in the New Jersey metropolitan area. The county is home to Mantoloking, the wealthiest community in the state of New Jersey and Brick Township, America's safest city. It is the second largest county by area in NJ.Ocean County has a total area of approximately 916 square miles of which 69% is land and 31% water. As of the 2000 census, there were 510,916 people, 200,402 households, and 137,876 families residing in Ocean County, NJ.