
Sullivans Island
- County:
- Charleston County
- County Seat:
- No
- Area (mi²):
- 2.498
- State:
- South Carolina
Sullivan's Island is a town located in Charleston County, South Carolina. Sullivan's Island has a 2025 population of 1,938. Sullivan's Island is currently growing at a rate of 0.41% annually and its population has increased by 2.11% since the most recent census, which recorded a population of 1,898 in 2020.
The average household income in Sullivan's Island is $309,339 with a poverty rate of 8.32%. The median age in Sullivan's Island is 52.9 years: 48.3 years for males, and 57.7 years for females.