The incident happened just before 5 p.m. Sunday.
Police say the suspect approached the 9-year-old victim and touched her buttocks.
No injuries were reported.
The suspect is described as a white male in his 30s, approximately 240 pounds with black hair. He was last seen wearing a blue long-sleeve shirt, dark jeans and glasses (white metal wired).
Anyone with information in regards to this incident is asked to call Crime stoppers at 1-800-577-TIPS (8477).