North Barrington, IL has a population of 2,972 and is the 8,872nd largest city in the United States. The population density is 633 per sq mi which is 185% higher than the Illinois average and 599% higher than the national average. The median age in North Barrington is 49 which is approximately 32% higher than the Illinois average of 37. In North Barrington, 73% of the population over 15 years of age are married, 90% speak English and 2% speak Spanish. 63% of North Barrington residents were born in Illinois, 29% were born out of state, 1% were born outside of the United States and 7% were foreign born.