Twelve, all Americans. Two each from Apollos 11, 12, 14, 15, 16, 17.
12 astronauts landed on the Moon in 6 Apollo missions.
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There were a total of 12 astronauts who walked on the moon.
12 astronauts have gotten to walk on the moon, 2 each mission with one astronaut staying back in the Command Module. 18 astronauts were on the missions (3 per mission), 2 walking on the moon each...
No astronauts have died on the moon.