According to a news release from the city police agency, the 19-year-old was not identified.
He was shot about 12:20 a.m. on Bradby Lane in Hahn Village.
He was taken to a local hospital and his injuries are not believed, life-threatening, the police statement said.
The suspect, described only as a black male dressed in black, fired at least four shots from a shotgun before fleeing on foot, police said.
Anyone with information about this crime is asked to contact the Aiken Department of Public Safety: (803) 642-7620. Individuals also should call Crimestoppers of the Midlands: (888) Crime-SC. Callers can remain anonymous and will be eligible for a cash reward of between $50 and $1,000.