North Augusta is a city in Aiken and Edgefield counties in the U.S. state of South Carolina, on the north bank of the Savannah River. It lies directly across the river, and state border, from Augusta, Georgia. The population was 24,379 at the 2020 census, making it the 21st-most populous city in South Carolina. The city is included in the Central Savannah River Area (CSRA) and is part of the Augusta, Georgia, metropolitan area.

Aiken County is a county in the U.S. state of South Carolina. As of the 2020 census, its population was 168,808. Its county seat and largest community is Aiken. Aiken County is a part of the Augusta-Richmond County, GA-SC Metropolitan Statistical Area. It is mostly in the Sandhills region, with the northern parts reaching in the Piedmont and southern parts reaching into the Coastal Plain.