The Savannah Morning News reports that the accident happened Thursday afternoon, just outside of Pembroke.
Bryan County Sheriff Clyde Smith said the child was leaving the school bus around 4 p.m. on Georgia Highway 119 near the intersection of Wildwood Church Road.
Smith said the Georgia State Patrol is investigating the accident.
Pembroke is about 30 miles west of Savannah.
Information from: Savannah Morning News.