S71
S71 may refer to:
Submarines[edit]
- INS Chakra (S71), of the Indian Navy
- INS Tanin (S71), of the Israeli Navy
- Spanish submarine Galerna (S71)
Other uses[edit]
- S71 (Long Island bus)
- Blériot-SPAD S.71, a French biplane fighter
- Savoia-Marchetti S.71, an Italian transport aircraft
- S71, a postcode district for Barnsley, England