S8, S-8, or S 8 may refer to:
Transportation S8 (Berlin), an S-Bahn line in Germany S8 (Milan suburban railway network) line in Italy S8 (Munich) an S-Bahn in Germany S8 (RER Vaud), an S-Bahn line in Switzerland S8 (Rhine-Main S-Bahn), a line in Germany S8 (Rhine-Ruhr S-Bahn), a line in North Rhine-Westphalia, Germany S8 (ZVV), a Zurich S-Bahn line in the cantons of Zurich and Zug, Switzerland S8, a line in the Brussels Regional Express Network in Belgium S8, a line of Styria S-Bahn in Austria S8, a line of Tyrol S-Bahn in Austria Line S8 (Nanjing Metro) in China Stagecoach Gold bus route S8, a bus route in Oxfordshire, England Expressway S8 (Poland) Short S.8 Calcutta, British transport flying boat London Underground S8 Stock
Other uses S8 (classification), for disabled swimmers S-8 (rocket), a Russian air-to-surface missile S8: Keep container dry, a safety phrase in chemistry Samsung Galaxy S8, a smartphone by Samsung Samsung Galaxy Tab S8, a tablet computer by Samsung Octasulfur, the main allotrope of sulfur, having the formula S8 Audi S8, German car S8 (star), in the Sagittarius A* cluster
See also 8S (disambiguation)