State Route 306 (SR 306) is a west-to-east state route located entirely in Forsyth County, Georgia.

SR 306 continues northeast, now known as Keith Bridge Road, through northern and northeastern Forsyth County to reach its eastern terminus at SR 53, just west of the northern part of Lake Lanier.

[2] The Georgia Department of Transportation average annual daily traffic (AADT) numbers for the year 2011 show a variety in the daily averages across the route.

Seeing decreasing vehicle load numbers, the 5.22 miles (8.40 km) stretch from SR 369 to Jot Em Down Road tallied 11,480 vehicles, and the final portion to SR 53 had a count of 8,010 vehicles per day.

[2] The designation of SR 306 makes its first appearance on Georgia state highway maps in 1957, and only the stretch from the current eastern end of its concurrency with SR 9 (and US 19 at the time) to the route's eastern terminus at SR 53 was in existence.