S14 may refer to:

Aircraft Fokker S.14 Machtrainer, a Dutch jet trainer Letov Š-14, a Czechoslovak fighter Rans S-14 Airaile, an American civil utility aircraft Short S.14 Sarafrand, a British biplane flying boat Sikorsky S-14, a Russian aircraft design proposal

Automobiles BMW S14, an automobile engine Nissan Silvia (S14), a Japanese sports car Nissan 240SX (S14), a sports car sold in North America

Rail and transit Lines S14 (St. Gallen S-Bahn), in Thurgau, Switzerland S14 (ZVV), in Zurich and Zug, Switzerland S14, an Aargau S-Bahn line, Switzerland Line S14 (Milan suburban railway service)

Locomotives LSWR S14 class, a steam locomotive

Stations Aratama-bashi Station, in Mizuho-ku, Nagoya, Aichi Prefecture, Japan Gakuen-Toshi Station, in Kobe, Hyōgo Prefecture, Japan Iyo-Shirataki Station, in Ōzu, Ehime Prefecture, Japan Minami-Otaru Station, in Otaru, Hokkaido, Japan Nishi-Nagahori Station, in Nishi-ku, Osaka, Japan Nishi-ojima Station, in Kōtō, Tokyo, Japan

Roads Expressway S14 (Poland) County Route S14 (California), United States

Science 40S ribosomal protein S14 British NVC community S14, a swamps and tall-herb fens community in the British National Vegetation Classification system S14: Keep away from ... (incompatible materials to be indicated by the manufacturer), a safety phrase S14, a star orbiting Sagittarius A*

Vessels

, an armed yacht of the Royal Canadian Navy , a submarine of the Royal Navy , a torpedo boat of the Imperial German Navy , a submarine of the United States Navy

Other uses S14 (classification), a Paralympic swimming disability classification for intellectually disabled athletes S14 (Ukrainian group), a radical nationalist group in Ukraine S14, a postcode district in Sheffield, England