John F. Kennedy
While President John F. Kennedy is credited with the creation of the Peace Corps, the first initiative came from Senator Hubert H. Humphrey, Jr. (D-Minnesota), who introduced the first bill to create the Peace Corps in 1957-three years prior to JFK and his University of Michigan speech. (Wikipedia)
For the source and more detailed information concerning your request, click on the related links section (Wikipedia) indicated directly below this answer section.John Kennedy initiated the Peace Corps.
B.Kennedy