Södermanland Wing (Swedish: Södermanlands flygflottilj), also F 11 Nyköping, or simply F 11, is a former Swedish Air Force wing with the main base located in south-east Sweden.

The airfield had two runways, one east-west of 2500 m (longest of the Swedish Air Force) and one north-south of 2000 m.[2] Blazon: "Or, the provincial badge of Södermanland, a griffon segreant sable, armed and langued gules".

[3] A colour was presented to the wing on 22 May 1942 at Stora torget in Nyköping by His Riyal Highness Crown Prince Gustaf Adolf.

[4] Blazon: "On blue cloth in the centre the badge of the Air Force; a winged two-bladed propeller under a royal crown proper.

In the first corner, the provincial badge of Södermanland; a griffon segreant or, armed and langued gules".