Old Tappan, NJ has a population of 5,942 and is the 5,788th largest city in the United States. The population density is 1,792 per sq mi which is 48% higher than the New Jersey average and 1878% higher than the national average. The median age in Old Tappan is 45 which is approximately 15% higher than the New Jersey average of 40. In Old Tappan, 71% of the population over 15 years of age are married, 74% speak English and 2% speak Spanish. 50% of Old Tappan residents were born in New Jersey, 30% were born out of state, 2% were born outside of the United States and 19% were foreign born.