Haledon, NJ has a population of 8,399 and is the 4,523rd largest city in the United States. The population density is 6,914 per sq mi which is 691287% higher than the New Jersey average and 7531% higher than the national average. The median age in Haledon is 34 which is approximately 14% lower than the New Jersey average of 40. In Haledon, 50% of the population over 15 years of age are married, 43% speak English and 35% speak Spanish. 55% of Haledon residents were born in New Jersey, 8% were born out of state, 5% were born outside of the United States and 32% were foreign born.