25 Sector RAF is a former Royal Air Force Sector that was operational during both the First and the Second World Wars.

25th (Training) Wing RFC was formed on 18 September 1916 at Castle Bromwich Aerodrome, it joined Southern Group Command on 10 January 1917.

The wing controlled Castle Bromwich, Lilbourne Aerodrome & Tern Hill Aerodrome and was transferred to Western Group Command on 26 September 1917 then on 1 April 1918 it was transferred 13th Group RAF and disbanded on 1 July 1918.

25 (Base) Defence Wing RAF was formed on 1 March 1944 within No.

The sector landed on Utah Beach on 28 August 1944, moving to Vannes then Everburg before disbanding on 16 March 1945 and becoming No.