Kingston Estates, NJ has a population of 6,506 and is the 5,458th largest city in the United States. The population density is 5,617 per sq mi which is 561607% higher than the New Jersey average and 6100% higher than the national average. The median age in Kingston Estates is 40 which is approximately 2% higher than the New Jersey average of 40. In Kingston Estates, 57% of the population over 15 years of age are married, 69% speak English and 8% speak Spanish. 39% of Kingston Estates residents were born in New Jersey, 39% were born out of state, 1% were born outside of the United States and 21% were foreign born.