A total of 12 people have walked on the moon. They were all American astronauts who participated in the Apollo program between 1969 and 1972. Here they are:

Apollo 11 (July 20, 1969):

* Neil Armstrong
* Buzz Aldrin

Apollo 12 (November 19, 1969):

* Pete Conrad
* Alan Bean

Apollo 14 (February 5, 1971):

* Alan Shepard
* Edgar Mitchell

Apollo 15 (July 30, 1971):

* David Scott
* James Irwin

Apollo 16 (April 21, 1972):

* John Young
* Charles Duke

Apollo 17 (December 11, 1972):

* Eugene Cernan
* Harrison Schmitt

It's worth noting that some other astronauts have traveled to the moon but did not walk on its surface. These astronauts were part of the Apollo missions that focused on lunar orbit or other objectives.