S11

S11 may refer to:

Aircraft

 * Fokker S-11, a trainer aircraft
 * Rans S-11 Pursuit, an American light aircraft
 * SABCA S.11, a Belgian prototype airliner
 * Sikorsky S-11, a Russian reconnaissance aircraft
 * SPAD S.XI, a French reconnaissance biplane

Lines

 * S11 (Rhine-Ruhr S-Bahn), Germany
 * S11 (ZVV), Zürich, Switzerland
 * Line S11 (Milan suburban railway service), Italy
 * S11, of the Hamburg S-Bahn, Germany
 * S11, of the Karlsruhe Stadtbahn, Germany

Locomotives

 * ALCO S-11, a diesel-electric switcher
 * LSWR S11 class, a steam locomotive
 * Sri Lanka Railways S11, a diesel multiple unit

Stations

 * Kitanada Station, in Ōzu, Ehime Prefecture, Japan
 * Morishita Station (Tokyo), in Kōtō, Tokyo, Japan
 * Myōhōji Station (Hyōgo), in Suma-ku, Kobe, Hyōgo Prefecture, Japan
 * Sakurayama Station, in Mizuho-ku, Nagoya, Aichi Prefecture, Japan
 * Wutthakat BTS station, in Bangkok, Thailan
 * Zenibako Station, in Otaru, Hokkaido, Japan

Roads

 * S11 highway (Georgia)
 * Expressway S11 (Poland)
 * County Route S11 (California), United States

Submarines

 * Brazilian submarine Rio Grande do Sul (S11) (Balao class), in service 1963–1972
 * Brazilian submarine Rio Grande do Sul (S11) (Tench class), in service 1972–1978
 * HMS Orpheus (S11), of the Royal Navy
 * USS S-11 (SS-116), of the United States Navy

Other uses

 * S11 (classification), a disability swimming classification
 * S11 (protest), at the meeting of the World Economic Forum in Melbourne, Australia on September 11, 2000
 * 40S ribosomal protein S11
 * British NVC community S11, see swamps and tall-herb fens in the British National Vegetation Classification system
 * Nissan Silvia (S11), a sports car
 * Project S-11, a video game
 * September 11 attacks
 * S11, a postcode district in Sheffield, England
 * S-11, a creature in the Sharktopus film