The 1957 Rebel 300 was a NASCAR Convertible Series race in Darlington, South Carolina on May 12, 1957. While the Rebel 300 was originally a convertible race, it eventually became absorbed into what is now known as the NASCAR Cup Series. From a lineal historical standpoint, this race is the first in the lineal history of the current Darlington Cup race since 2005, the Southern 500.