The 1939 Australian Stock Car Road Championship took place at the Lobethal Circuit in South Australia on 2 January 1939. The race, which covered a total of 50 miles over six laps of the 8.6-mile course, was conducted under a handicap format where the slowest cars began the race first, while the fastest started last.
The race was open to standard touring and sports cars, fitted with standard equipment and operating on standard first grade fuel. The only modifications permitted to the cars were the raising of the compression ratio and alterations to the suspension.
The race was won by Tom Brady driving a Singer Bantam.