Metuchen, NJ has a population of 13,791 and is the 3,030th largest city in the United States. The population density is 4,840 per sq mi which is 483908% higher than the New Jersey average and 5242% higher than the national average. The median age in Metuchen is 42 which is approximately 5% higher than the New Jersey average of 40. In Metuchen, 66% of the population over 15 years of age are married, 75% speak English and 3% speak Spanish. 54% of Metuchen residents were born in New Jersey, 24% were born out of state, 1% were born outside of the United States and 21% were foreign born.