Leo Joseph "Bud" Goodwin (November 13, 1883 – May 25, 1957) was an American swimmer, diver, and water polo player who competed for the New York Athletic Club.

Dr. Dave Hennen, a swimmer from his club and a famous surgeon, dissected his entire forearm while cleaning it from poison, then re-assembled the veins, muscles and ligaments.

He was an accomplished marathon swimmer, and gained local notoriety for winning New York's Battery-to-Coney Island race.

He placed third, taking a bronze medal, in the "Plunge for distance", gliding a measured 17.37 meters in a 60 second timed interval after a dive of no more than 18 inches from the surface of the pool where the arms and legs were not used to gain momentum.

At the 1915 Panama–Pacific International Exposition Goodwin set an outdoor record by swimming 3.5 miles in 1 hour and 38 minutes in San Francisco Bay.

He later received the Congressional Gold Medal, the highest peacetime award in the United States, for rescuing people from drowning at Newport News, Virginia.