Cranbury, NJ has a population of 2,256 and is the 10,370th largest city in the United States. The population density is 1,863 per sq mi which is 186231% higher than the New Jersey average and 1957% higher than the national average. The median age in Cranbury is 48 which is approximately 22% higher than the New Jersey average of 40. In Cranbury, 64% of the population over 15 years of age are married, 81% speak English and 2% speak Spanish. 49% of Cranbury residents were born in New Jersey, 37% were born out of state, 0% were born outside of the United States and 14% were foreign born.