Port Barrington, IL has a population of 1,490 and is the 12,726th largest city in the United States. The population density is 1,334 per sq mi which is 500% higher than the Illinois average and 1373% higher than the national average. The median age in Port Barrington is 40 which is approximately 6% higher than the Illinois average of 37. In Port Barrington, 69% of the population over 15 years of age are married, 85% speak English and 3% speak Spanish. 74% of Port Barrington residents were born in Illinois, 16% were born out of state, 1% were born outside of the United States and 8% were foreign born.