Royal Air Force Swingate Down or more simply RAF Swingate Down is a former Royal Air Force Chain Home Low radar station operational during the Second World War located north of Dover, Kent, England.

With the increasing possibility of war, the site was further developed as a military airfield, becoming Dover (St. Margaret's) Aerodrome in July 1913, although still also known as 'Swingate'.

At the outbreak of war in August 1914, all four squadrons of the RFC were posted to Swingate, and on 8 August 1914, the entire strength, a total of 56 aircraft, set out to cross the English Channel, bound for Amiens in France.

[1] For the duration of the war, Swingate served as a training centre, and as a stopping-off point for aircraft before flying over the English Channel to France.

The following units used Swingate in one way or another:[2] RAF Dover was re-established as a Chain Home radar station during 1938.