Dover Beaches North is an unincorporated community and census-designated place located within Toms River, in Ocean County, New Jersey, United States. As of the 2010 United States Census, the CDP's population was 1,239. The CDP includes the communities of Ocean Beaches 1, 2 and 3, Chadwick Beach, Chadwick Island, Seacrest Beach, Monterey Beach, Silver Beach, Normandy Shores and half of Normandy Beach. Dover Beaches North is situated on the Barnegat Peninsula, a long, narrow barrier peninsula that separates Barnegat Bay from the Atlantic Ocean.Toms River Township is split by the United States Census Bureau into three CDPs; Toms River CDP on the mainland including over 95% of the township's population, along with Dover Beaches North and Dover Beaches South.