State Route 515 (SR 515) is a four-lane C-shaped state highway in the northern part of the U.S. state of Georgia. It begins just west of Nelson. It curves to the northeast to Lake Chatuge, where it heads north to the North Carolina state line. The route was built to give motorists in the north Georgia mountains better access to Atlanta and its outlying suburbs, as opposed to the old SR 5 and U.S. Route 76 (US 76) routes, which this project replaced. SR 515 is also known as the Zell Miller Mountain Parkway, in honor of the Young Harris native turned Georgia governor and U.S. senator. It is one of the Georgia Department of Transportation's GRIP corridors. The highway is known for its fantastic mountain views all along its route. SR 515 is part of the Appalachian Development Highway System's Corridor A.

SR 515 begins just west of Nelson and just north of the Cherokee-Pickens County line, at the convergence of the northern terminus of Interstate 575, SR 5, the northern terminus of SR 5 Business, and the northern terminus of SR 372. It is concurrent with SR 5 from its southern terminus to Blue Ridge. It is also concurrent with US 76 from East Ellijay to a point between Young Harris and Hiawassee. It maintains a fairly strict south-north routing from its southern terminus to Blue Ridge and then becomes a due east-west route for the remainder of its length.

SR 515 is a significant route for the north Georgia mountains, funneling tourist traffic and serving as a growth corridor. SR 515 sees an Average Annual Daily Traffic (AADT) of more than 10,000 vehicles south of Blue Ridge, and at least 5,000 on the entirety of the route.

The entire length of SR 515, including the concurrent sections, is part of the National Highway System, a system of routes determined to be the most important for the nation's economy, mobility and defense.

The road that is now SR 515 was established at least by 1920 along the same alignment as it runs today. This route was then signed as SR 5 from the southern terminus to Blue Ridge and SR 2 for the rest of the route. The entire route was paved by this time. By 1990, SR 515 was designated along the entire length.