All together there were 7,245 American POW's. Of these, 4,418 returned to the U.S, 2,847 died, and 21 refused repatriation. There were also 389 POW's known to be alive in North Korea after all US POW's had supposedly been returned.
According to the data from the the United States Department of Defense, the U.S. suffered 33,686 battle deaths, along with 2,830 non-battle deaths during the Korean War and 8,176 missing in action....