Jasper County is the southernmost county in the U.S. state of South Carolina. As of the 2020 census, the population was 28,791. Its county seat is Ridgeland and its largest community is Hardeeville. The county was formed in 1912 from portions of Hampton County and Beaufort County. Jasper County is included in the Hilton Head Island-Bluffton-Port Royal, SC Metropolitan Statistical Area. It is located in the Lowcountry region of the state. As of 2026, it was the fastest growing county in the United States.
Geography
According to the U.S. Census Bureau, the county has a total area of , of which is land and (6.62%) is water.
National protected areas
- Savannah National Wildlife Refuge (part)
- Tybee National Wildlife Refuge
State and local protected areas/sites
- Frampton Plantation House
- Kingfisher Pond Recreation Area
- Old House Plantation
- Tillman Sand Ridge Heritage Preserve/Wildlife Management Area
- Turtle Island Wildlife Management Area
- Middle River
- Okatee River
- Savannah River
- Tulifiny River
Adjacent counties
- Hampton County – north
- Beaufort County – east
- Chatham County, Georgia – south
- Effingham County, Georgia – west