State Route 313 (SR 313) is a north-south state highway located entirely in Worth County in the southwestern part of the U.S. state of Georgia.

SR 313 begins at an intersection with US 82/SR 520 in Sylvester. The route heads north-northwest through rural parts of the county, and along the way, passes through the unincorporated community of Isabella. After Isballa, SR 313 continues heading north-northwest until it meets SR 32 in the unincorporated community of Doles. The highway continues north-northwest, and curves to the northwest just before meeting its northern terminus, an intersection with SR 300 in Warwick.

The entire route is in Worth County.