S25

S25 can refer to:

Aircraft

 * Blériot-SPAD S.25, a French biplane
 * Letov Š-25, a Czechoslovak biplane trainer
 * Short S.25 Sandringham, a British flying boat airliner
 * Short S.25 Sunderland, a British flying boat bomber
 * Sikorsky S-25, a Russian biplane bomber
 * Spalinger S.25, a Swiss training glider

Roads

 * County Route S25 (California)
 * County Route S25 (Bergen County, New Jersey)
 * New Jersey Route 413, numbered S25 until 1953

Rail and transit

 * S25 (Berlin), a line on the Berlin S-Bahn
 * S25 (Long Island bus)
 * S25 (ZVV), a line of the Zürich S-Bahn
 * Niseko Station, in Hokkaido, Japan

Other uses

 * S-25 (rocket), a Soviet air-to-ground rocket
 * 40S ribosomal protein S25
 * British NVC community S25, a swamps and tall-herb fens community in the British National Vegetation Classification system
 * INS Vagir (S25), a submarine of the Indian Navy
 * S25: Avoid contact with eyes, a safety phrase
 * S-25 Berkut, a Soviet surface-to-air missile system
 * Siemens S25, a Siemens Mobile phone
 * USS S-25 (SS-130), a submarine of the United States Navy
 * S25, a postcode district in Sheffield, England