James Francis Reilly, II, Ph.D. (born March 18, 1954) is an American geologist and a former NASA astronaut who has flown on three space shuttle missions: STS-89, STS-104 and STS-117. He was born at Mountain Home Air Force Base, Idaho and considers Mesquite, Texas to be his hometown. He enjoys flying, skiing, photography, running, soccer, hunting and fishing.