S33

S33 may refer to:

== Aviation == Blériot-SPAD S.33, a French airliner Letov Š-33, a Czechoslovak bomber Madras Municipal Airport, in Jefferson County, Oregon, United States Short S.33, a variant of the Short S.27 British biplane of the 1910s Short S.33, a variant of the Short Empire British flying boat of the 1930s Sikorsky S-33 Messenger, an American sesquiplane Spectrum S-33 Independence, an American business jet