Peter O'Donnell (28 February 1939 – 9 January 2008) was an Australian sailor and Olympic champion. He competed at the 1964 Summer Olympics in Tokyo and won a gold medal in the 5.5 metre class, with the boat Barrenjoey and team members Bill Northam and James Sargeant. In 2017, he was an inaugural inductee to the Australia Sailing Hall of Fame with Northam and Sargeant.