State Route 15 (SR 15) is a 346-mile-long (557 km) state highway that travels south-to-north across the entire length of the U.S. state of Georgia, east of its centerline. It connects the Florida state line, southeast of Folkston with the North Carolina state line, north-northeast of Dillard, via Vidalia, Sandersville, Athens, Demorest, and Clayton.