S6 or S-6 may refer to:

Routes

• S6 (Berlin), an S-Bahn line in Germany

• S6 (Milan suburban railway network) line in Italy

• S6 (Munich), an S-Bahn line in Germany

• S6 (Rhine-Main S-Bahn) line in Germany

• S6 (Rhine-Ruhr S-Bahn) line in Germany

• S6 (St. Gallen S-Bahn) line in the cantons of Glarus and St. Gallen, Switzerland

• S6 (ZVV), a Zurich S-Bahn line in the cantons of Aargau and Zurich in Switzerland

• S6, a cross-border line of Basel S-Bahn, Switzerland/Germany

• S6, a Hanover S-Bahn, line in Germany

• S6, a Karlsruhe Stadtbahn, line in Germany

• S6, a Lucerne S-Bahn, line in the cantons of Bern and Lucerne, Switzerland

• S6, a Rhein-Ruhr S-Bahn, line in Germany

• S6, a Rhine-Main S-Bahn, line in Germany

• S6, a Stuttgart S-Bahn, line in Germany

• S6, a Styria S-Bahn line in Austria

• S6, a cross-border line of Tyrol S-Bahn, Austria/Germany

• Line S6 (Beijing Subway), China

• Line S6 (Nanjing Metro), China

• Seehas, a regional railway between Konstanz and Engen, Germany

• Tongmi line in China

• County Route S6 (California)

• Expressway S6 (Poland)

• Essex, a county of England

• S6 postcode, covering areas of north western Sheffield

Science

• Ribosomal protein s6

• S6: Keep under ... (inert gas to be specified by the manufacturer), a safety phrase in chemistry

• hexasulfur, a cyclic sulfur allotrope

• the symmetric group of degree six

Technology

• Samsung Galaxy S6, a smartphone produced by Samsung

• Samsung Galaxy Tab S6, an Android tablet

• S6 NBC Respirator, the protective gas mask issued to the British armed forces from 1966 up until the introduction of the current-issue S10 in 1986

• S6 truss, a part of the International Space Station

• s6 (software), a software suite providing process supervision in Unix-like systems.

Vehicles

• ALCO S-6, an American diesel switching (shunting) locomotive

• Audi S6, a car

• Prussian S 6, a 1906 steam locomotives class

• Union Pacific Class S-6, an American diesel switching (shunting) locomotive

• Rans S-6 Coyote II, a light aircraft

• Supermarine S.6 (1929), and Supermarine S.6B (1931), British racing seaplanes

• USS S-6 (SS-111), a 1919 S-class submarine of the United States Navy

• HMS Cachalot (S06), a 1957 British Porpoise-class submarine

Other uses

• Staff (military), a communications officer within military units

• Star Air (Denmark), IATA airline designator

• S6 (classification), a paralympic swimming classification

See also

• 6S (disambiguation)