Marine Corps Air Station Beaufort or MCAS Beaufort (ICAO: KNBC, FAA LID: NBC) is a United States Marine Corps (USMC) air base located 5 kilometres (3.1 mi) northwest of the central business district of Beaufort, a city in Beaufort County, South Carolina, United States. About 4,700 personnel serve at the station, and it is home to four Marine Corps F/A-18 Hornet fighter-attack squadrons and one F-35B Lighting II training squadron.

Beaufort is served by the Beaufort County Airport (IATA: BFT, ICAO: KARW, FAA LID: ARW), located 10 kilometres (6.2 mi) southeast of MCAS Beaufort.