S9
- 9S (disambiguation)
- Allotropes of sulfur
- Basel S-Bahn
- British National Vegetation Classification
- County Route S9 (California)
- Cowon S9
- East African Safari Air
- HMS Oberon (S09)
- Karlsruhe Stadtbahn
- Line S9 (Milan suburban railway service)
- Line S9 (Nanjing Metro)
- List of Motorola products
- List of Osamu Tezuka anime
- List of aircraft registration prefixes
- Lucerne S-Bahn
- Prussian S 9
- Rans S-9 Chaos
- S 9 (Abydos)
- S postcode area
- S09
- S9 (Berlin)
- S9 (RER Vaud)
- S9 (Rhine-Main S-Bahn)
- S9 (Rhine-Ruhr S-Bahn)
- S9 (St. Gallen S-Bahn)
- S9 (ZVV)
- S9 (classification)
- S9 fraction
- SIAI S.9
- SREC (file format)
- Samsung Galaxy S9
- Samsung Galaxy Tab S9
- Sri Lanka Railways S9
- Styria S-Bahn
- USS S-9 (SS-114)