Reginald Donald Whittington[1] (born January 23, 1946) is an American former racing driver from Lubbock, Texas, who won the 1979 24 Hours of Le Mans together with his brother Bill Whittington and Klaus Ludwig in a Porsche 935, although Ludwig, a multiple winner at Le Mans and elsewhere, did most of the driving in the heavy rain as the brothers did not have any real racing experience prior to the late 1970s.

In 1979, the brothers purchased and operated the Road Atlanta road-racing circuit, reportedly utilizing the secluded backstretch of the course as a landing strip for aircraft.

In 1984, Don's brother Bill co-owned, with Randy Lanier and Marty Hinze, the Blue Thunder Racing Team.

[4] In 2009, Whittington sued the Indianapolis Motor Speedway Foundation over possession of the 1979 24 Hours of Le Mans winning Porsche 935.

On April 13, 2010, the United States Court of Appeals for the Seventh Circuit sided with the museum and found the evidence pointed to the car being a donation.