Hawthorne, NJ has a population of 18,950 and is the 2,305th largest city in the United States. The population density is 5,711 per sq mi which is 570961% higher than the New Jersey average and 6203% higher than the national average. The median age in Hawthorne is 39 which is approximately 1% lower than the New Jersey average of 40. In Hawthorne, 58% of the population over 15 years of age are married, 71% speak English and 17% speak Spanish. 66% of Hawthorne residents were born in New Jersey, 16% were born out of state, 2% were born outside of the United States and 16% were foreign born.