State Route 20 (SR 20) is a 165.345-mile-long (266.097 km) state highway roughly in the shape of a capital J rotated ninety degrees to the left, which travels through portions of Floyd, Bartow, Cherokee, Forsyth, Gwinnett, Walton, Rockdale, Newton, and Henry counties in the northwestern and north-central parts of the U.S. state of Georgia. Its counterclockwise, or western terminus is at the Alabama state line in Floyd County, and its clockwise, or eastern terminus occurs at its interchange with Lower Woolsey Road southwest of Hampton in Henry County south-southeast of the Atlanta Motor Speedway.

Floyd County is a county located in the northwestern part of the U.S. state of Georgia. As of the 2020 United States Census, the population was 98,584. The county seat is Rome.