A turnstile is a pedestrian gate.
Turnstile may also refer to:
- Turnstile (symbol), symbol used in mathematics, logic, and computer science
- Turnstiles (album), a 1976 studio album by Billy Joel
- Turnstile antenna, set of two dipole antennas
- Optical turnstile, physical security device
- TURNSTILE, a codename for the UK's Central Government War Headquarters
- Turnstile (band), a hardcore punk band
- The Turnstile, a 1912 novel by A. E. W. Mason
- in the fiction movie Tenet (film), a device that inverts entropy