Toms River is a township in Ocean County, New Jersey, United States. Its mainland portion is also a census-designated place of the same name, which serves as the county seat of Ocean County. Formerly known as the Township of Dover, in 2006 voters approved a change of the official name to the Township of Toms River, adopting the name of the largest unincorporated community within the township. As of the 2010 United States Census, the township had a total population of 91,239, with the township ranking as the 8th-most-populous municipality in the state in 2010 (after having been ranked 7th in 2000) and the second most-populous municipality in Ocean County (behind Lakewood Township, which had a population of 92,843). The 2010 population increased by 1,533 (+1.7%) from the 89,706 counted in the 2000 Census, which had in turn increased by 13,335 (+17.5%) from the 76,371 counted in the 1990 Census.