Lesley Leigh Bush (born September 17, 1947) is an American diver and 1964 Olympic champion in the 10-meter platform who competed for Indiana University.

[5][6] Already having moved to Princeton, New Jersey, Bush placed ninth on the 10-meter platform at the August 1963, Senior Women's National AAU Swimming and Diving Championship.

[9] Bush attended and swam for Indiana University where she was managed by Hall of Fame Coach Hobie Billingsley.

[10] Bush tried out for the 1964 Olympic trials after training with Indiana University Coach Hobie Billingsley on the 10-meter platform for only five weeks during a summer break after her High School Junior year.

[4][13] At only 16, Bush represented the US at the 1964 Summer Olympics in Tokyo, where despite her youth and lack of international experience, she received a gold medal in Platform Diving.

[14] Prior to the competition, many coaches from opposing nations dismissed her as a serious competitor due to her young age and limited experience, and she was not expected to medal.

In a close match, Bush finished only 1.35 points ahead of the defending champion and favorite, East Germany's Ingrid Krämer-Engel.