The incident happened at around 9 p.m. on Monday, according to Carrie Cuthbertson, public information officer.
The suspect allegedly demanded money from the employee before running with an undisclosed amount of cash.
The suspect then got into a silver two-door hatchback vehicle heading south on Highway 17, officials said.
No one was hurt during the incident.
The suspect is described as a white male in his twenties who is approximately 6'00" in height and approximately 210-220 pounds with thick sideburns. The suspect was wearing big sunglasses, a red bandana covering his face and jeans.
Anyone that can identify the suspect or has any information about the robbery is asked to contact the Georgetown County Sheriff's Office at (843) 546-5101.
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