Barrington, NJ has a population of 6,831 and is the 5,264th largest city in the United States. The population density is 4,320 per sq mi which is 431908% higher than the New Jersey average and 4668% higher than the national average. The median age in Barrington is 40 which is approximately 2% higher than the New Jersey average of 40. In Barrington, 52% of the population over 15 years of age are married, 95% speak English and 2% speak Spanish. 60% of Barrington residents were born in New Jersey, 35% were born out of state, 1% were born outside of the United States and 4% were foreign born.