Airman first class (A1C) is the third enlisted rank in the United States Air Force, just above airman and below senior airman. The male form of rank designation also applies to women. The rank of airman first class is considered a junior enlisted rank, with the non-commissioned officers and senior non-commissioned officers above it.

An airman is a member of an air force or air arm of a nation's armed forces. In certain air forces, it can also refer to a specific enlisted rank. An airman can also be referred as a soldier in other definitions. As a military rank designation the male form of address also applies to women.