RMAF Butterworth (Malay: TUDM Butterworth) is an active Air Force Station of the Royal Malaysian Air Force (RMAF) situated 4.5 nautical miles (8.3 km; 5.2 mi) from Butterworth in Penang, Malaysia. It is currently home to the Headquarters Integrated Area Defence System (HQIADS), part of the Five Power Defence Arrangements (FPDA).

The airfield was originally known as RAF Station Butterworth and later as RAAF Butterworth, under the operational commands of the Royal Air Force (RAF) and the Royal Australian Air Force (RAAF) respectively. Although the airfield is now a RMAF base, under the terms of the FPDA the RAAF are a co-tenant of the base, maintaining an operational presence in the region alongside the RMAF squadrons. The airfield and associated base facilities are colloquially referred to as Butterworth.