W33

W33 may refer to:
 * W33 (nuclear warhead), an American nuclear artillery shell
 * Friday Harbor Seaplane Base, on San Juan Island, Washington, United States
 * Hansa-Brandenburg W.33, a German floatplane
 * Junkers W 33, a German transport aircraft
 * Jurruru language
 * Minami-Pippu Station, in Hokkaido Japan