Wagener is a town in Aiken County, South Carolina, United States. The population was 863 at the 2000 census. It is part of the Augusta, Georgia metropolitan area.
Wagener is located at 33°39′10″N 81°21′51″W / 33.65278°N 81.36417°W / 33.65278; -81.36417 (33.652701, -81.364187).
According to the United States Census Bureau, the town has a total area of 1.3 square miles (3.3 km²), of which, 1.3 square miles (3.3 km²) of it is land and 0.79% is water.