How many Medals of Honor have been awarded in US history?

Answer 1

3,464 This medal was first awarded during the American Civil War. One unit of men all received the medal for simply reenlisting in 1864, but these medals were later rescinded as it became evident that this would be a much more special honor. George Armstrong Custer's brother Tom received two of them in the Civil War. Tom Custer was killed with his brothers George and Boston Custer at the Little Big Horn river battle on June 25th, 1876.
19 men have received two Medals of Honor.
One woman has received this award - during the Civil War for medical work
Here's an excerpt from a good site (listed below)

"The Medal of Honor was first issued during the Civil War, and since it was the only military award for valor during that war, 1,527 medals were awarded. By the time of the Spanish American War, there were more earned medals available for distribution, and the Medal of Honor became the supreme honor. During the military action in Vietnam, a much longer conflict than the Civil War, 238 medals were awarded."

Answer 2

3,459 medals have been awarded. The number of recipients is 3,408. Some people received more than one medal. The stats below are from the Department of Defense.

Answer 3

3,464.