Robbinsville, NJ has a population of 3,321 and is the 8,305th largest city in the United States. The population density is 5,191 per sq mi which is 519003% higher than the New Jersey average and 5630% higher than the national average. The median age in Robbinsville is 43 which is approximately 9% higher than the New Jersey average of 40. In Robbinsville, 70% of the population over 15 years of age are married, 71% speak English and 3% speak Spanish. 50% of Robbinsville residents were born in New Jersey, 26% were born out of state, 2% were born outside of the United States and 22% were foreign born.