State Road 620 (SR 620) is a 0.672-mile-long (1.081 km) state highway in Polk County, Florida, that runs from SR 540 just south of Winter Haven city limits to SR 655 and Avenue O Southwest in southwestern Winter Haven. The route is only signed for the first 0.410 miles (0.660 km), after which it is unsigned for its concurrency with SR 655.