Salt Walther, American race car driver (b. 1947)
David "Salt" Walther (November 22, 1947 – December 27, 2012) was a driver in the USAC and CART Championship Car series. He also drove NASCAR stock cars and unlimited hydroplane boats, and was a car owner in USAC. Walther is best remembered for a crash at the start of the 1973 Indianapolis 500 that left him critically injured. He recovered from his injuries, returned in 1974, and placed 9th in the 1976 race. He also co-drove a car with Bob Harkey to 10th place in 1975.

He was the son of George Walther, owner of Dayton Steel Foundry, who fielded Indy 500 cars for Juan Manuel Fangio in 1958 and Mike Magill in 1959. His brother, George "Skipp" Walther III, was fatally injured while trying to qualify as an Unlimited driver at Miami Marine Stadium, in 1974.David Walther was given the nickname "Salt" during his teen years, owing to his boat racing. He is one of only eight unlimited hydroplane drivers to qualify for the Indianapolis 500.