S7 or S-7 may refer to:
Electronics and software
- Acer Aspire S7, a laptop
- Samsung Galaxy S7, a smartphone
- Simatic S7 PLC, an automation system based on Programmable Logic Controller from Siemens, successor to Simatic S5 PLC
- Sub7, a computer backdoor
Media
- Sovereign Seven, a superhero team and comic book published by DC Comics in 1995–1998
- Samurai 7, a 2004 anime series
Science and technology
- 7-sphere (S7), an n-sphere
- Heptasulfur (S7), a cyclic allotrope of sulfur
- S7 or S-7, a grade of tool steel
- S7: Keep container tightly closed, a safety phrase in chemistry
Transportation
Air
- Ambrosini S.7, an Italian racing aircraft flown before World War II
- Rans S-7 Courier, a light aircraft
- S7 Airlines, a Russian commercial airliner, its IATA Airlines code is also S7
Automobiles
- Audi S7, a German executive sports sedan
- BYD S7, a Chinese mid-size SUV formerly known as S6
- Haima S7, a Chinese compact SUV
- Huansu S7, a Chinese mid-size SUV
- JAC Refine S7, a Chinese mid-size SUV
- Saleen S7, an American supercar
Motorcycles
- Sunbeam S7, a British motorcycle
Rail
Trains
- London Underground S7 Stock, a type of train on London Underground, England
- Prussian S 7, a Prussian steam locomotives class
Lines
- S7 (Berlin), a S-Bahn line
- S7 (Munich), a S-Bahn line in Munich, Germany
- S7 (Rhine-Ruhr S-Bahn) line, Germany
- S7 (ZVV), a regional railway line of the Zürich S-Bahn, Switzerland
- Line S7 (Nanjing Metro)
- The Intercity Railway Connector, also known as Line S7 in the Beijing Metropolitan Area Railway planning
Roads and routes
- County Route S7 (California)
- Expressway S7 (Poland)
Watercraft
- HMS Sealion (S07), a 1959 British Porpoise-class submarine
- USS S-7 (SS-112), a 1920 S-class submarine of the United States Navy
Other uses
- S7 postcode, a postcode covering areas of southern Sheffield, England
- British NVC community S7, a swamps and tall-herb fens community in the British National Vegetation Classification system