Harlingen, NJ has a population of 186 and is the 24,784th largest city in the United States. The population density is 259 per sq mi which is 25833% higher than the New Jersey average and 186% higher than the national average. The median age in Harlingen is 58 which is approximately 48% higher than the New Jersey average of 40. In Harlingen, 64% of the population over 15 years of age are married, 95% speak English and 0% speak Spanish. 46% of Harlingen residents were born in New Jersey, 48% were born out of state, 0% were born outside of the United States and 5% were foreign born.