Yes, twelve people have walked on the moon. All of them were American astronauts, and they were part of the Apollo program.

The first person to walk on the moon was Neil Armstrong on July 20, 1969.

Here are the names of all the astronauts who have walked on the moon:

* Neil Armstrong (Apollo 11)

* Buzz Aldrin (Apollo 11)

* Pete Conrad (Apollo 12)

* Alan Bean (Apollo 12)

* Alan Shepard (Apollo 14)

* Edgar Mitchell (Apollo 14)

* David Scott (Apollo 15)

* James Irwin (Apollo 15)

* John Young (Apollo 16)

* Charles Duke (Apollo 16)

* Eugene Cernan (Apollo 17)

* Harrison Schmitt (Apollo 17)