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.

Mount Batten is a 24-metre (80-ft) tall outcrop of rock on a 600-metre (2000-ft) peninsula in Plymouth Sound, Devon, England, named after Sir William Batten (c.1600-1667), MP and Surveyor of the Navy; it was previously known as How Stert.