Royal Air Force Mount Batten, or more simply RAF Mount Batten, is a former Royal Air Force station and flying boat base at Mount Batten, a peninsula in Plymouth Sound, Devon, England, UK. Originally a seaplane station opened in 1917 as a Royal Navy Air Service Station Cattewater it became RAF Cattewater in 1918 and in 1928 was renamed RAF Mount Batten. The base is named after Captain Batten, a Civil War commander who defended this area at the time, with the Mountbatten family motto In Honour Bound taken as the station's motto.

Today, little evidence of the RAF base remains apart from several memorials, some aviation-related road names, the main slipway and two impressive Grade II listed F-type aeroplane hangars dating from 1917.