South Barrington
- County:
- Cook County
- County Seat:
- No
- Area (mi²):
- 7.458
- State:
- Illinois
South Barrington is a village located in Cook County, Illinois. South Barrington has a 2026 population of 5,061. South Barrington is currently growing at a rate of 0.98% annually but its population has decreased by -0.08% since the most recent census, which recorded a population of 5,065 in 2020.