RAF Mepal is a former RAF station located 0.7 miles (1.1 km) south of Mepal, Cambridgeshire, England and 5.9 miles (9.5 km) west of Ely. It was an "expansion" airfield whose construction commenced in July 1942 and opened in June 1943.
Mepal first hosted No. 75 (NZ) Squadron RAF flying Short Stirlings and later Avro Lancasters.
It was used towards the end of the Second World War to prepare Avro Lancaster bombers squadrons such as No. 44 (Rhodesia) squadron for use in Tiger Force which was to bomb Japan.
From 1957 PGM-17 Thor missiles were based at the airfield in the north east corner.