81 Group (81 Gp) was a group within the Royal Air Force's Fighter Command during the Second World War and the post-war era, which disbanded at the end of March 1958.

It was initially formed during December 1940, lasting almost two and a half years before disbanding in April 1943.

81 Group was formed on 16 December 1940 at RAF Sealand, as part of Fighter Command, to control the Operational Training Units.

On 19 February 1941 the group headquarters moved to Tallow Hall in Worcester, and then on 22 December 1941 it was based at Avening Court in Gloucestershire.

[2] The group was reformed on 1 January 1952 at RAF Watnall, in Nottinghamshire to control all training units within Fighter Command.