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

Electronics

 * Canon PowerShot S20, a digital camera
 * Chrome S20 series, a graphics accelerator
 * Samsung Galaxy S20, a series of smartphones
 * Akai S20, an Akai synthesizer

Lines

 * S20 (Long Island bus), in Suffolk County, New York, United States
 * S20 (Munich), in Germany
 * S20 (RER Fribourg), in Switzerland
 * S20 (TILO), in Ticino, Switzerland
 * S20 (ZVV), of the Zürich S-Bahn, Switzerland

Stations

 * Kamisawa Station (Nagoya), in Midori-ku, Nagoya, Aichi, Japan
 * Imazato Station (Osaka Metro), in Japan
 * Shikaribetsu Station, in Niki, Yoichi District, Hokkaidō, Japan
 * Shinozaki Station, in Edogawa, Tokyo, Japan

Roads

 * S20 Shanghai Outer Ring Expressway, China
 * County Route S20 (California), United States

Submarines

 * BRAZILIAN SUBMARINE Humaitá
 * HMS Opportune (S20), a submarine of the Royal Navy
 * INS Kursura (S20), a submarine of the Indian Navy
 * Type S20 submarine, an export version of China's Type 039A submarine
 * USS S-20 (SS-125), a submarine of the United States Navy

Other uses

 * 40S ribosomal protein S20
 * British NVC community S20, a natural habitat of swamps and tall-herb fens in the British National Vegetation Classification system
 * Nissan S20 engine, an automobile engine
 * S20: When using do not eat or drink, a safety phrase
 * Sako S20, a Finnish bolt-action rifle
 * Toyota Crown (S20), a luxury sedan
 * Venda language
 * S20, a postcode district in Sheffield, England