Highlands, NJ has a population of 4,900 and is the 6,561st largest city in the United States. The population density is 6,492 per sq mi which is 649137% higher than the New Jersey average and 7066% higher than the national average. The median age in Highlands is 50 which is approximately 28% higher than the New Jersey average of 40. In Highlands, 50% of the population over 15 years of age are married, 88% speak English and 8% speak Spanish. 57% of Highlands residents were born in New Jersey, 33% were born out of state, 2% were born outside of the United States and 8% were foreign born.