Truman Fontello "Fonty" Flock (March 21, 1920–July 5, 1972) of Fort Payne, Alabama was an early NASCAR driver.

He was the brother of NASCAR pioneers Tim Flock and Bob Flock, and the second female NASCAR driver Ethel Mobley. The four raced at the July 10, 1949 race at the Daytona Beach Road Course, which was the first event to feature a brother and a sister, and the only NASCAR event to feature four siblings. Ethel beat Fonty and Bob by finishing in eleventh.

Like many early NASCAR drivers, Fonty's career began by delivering illegal moonshine. He started delivering on his bicycle as a teenager. He used his car to deliver moonshine as he got older. "I used to deliberately seek out the sheriff and get him to chase me," he later recalled. "It was fun, and besides we could send to California to get special parts to modify our cars, and the sheriff couldn't afford to do that."

He won a 100 mile race Lakewood Speedway Park in Atlanta, Georgia in 1940. He raced on dirt tracks in Georgia.

He qualified in the pole position for the July 27, 1941 race at the Daytona Beach Road Course beside Roy Hall. Flock took the early lead, before Flock and Hall got together in the south turn. Flock rolled and landed upside down in bushes. The seatbelt broke during the rolling, and Flock was tossed around. He was rushed by ambulance to the hospital. Fonty suffered a crushed chest, broken pelvis, head and back injuries, and severe shock.