S20

S20 may refer to:

==Aviation== Letov Š-20, a Czechoslovak fighter Rans S-20 Raven, an American light-sport aircraft SABCA S-20, a Belgian aircraft Short S.20 Mercury, a British parasite seaplane Sikorsky S-20, a Russian biplane fighter SPAD S.XX, later the Blériot-SPAD S.20, a French fighter