The 918th Air Refueling Squadron is an inactive United States Air Force unit. It was last assigned to the 11th Bombardment Wing at Altus Air Force Base, Oklahoma. The 918th's predecessor, the 18th Combat Mapping Squadron, was active during World War II. Although most of the squadron remained in the United States during the war, part of its air echelon deployed to the Pacific where it performed photographic mapping missions until the unit was inactivated in 1944.