Sentinel may refer to:

Starships

• Prime reality
  • USS Sentinel, a Miranda-class starship.
  • USS Sentinel, an Akira-class starship.
  • USS Sentinel (NCC-1733-B), a Sovereign-class starship.
  • TDS Sentinel, a Trill starship.
• Alternate reality
  • USS Sentinel, an Arbiter-class missile cruiser.
  • USS Sentinel, a Constitution-class flagship.
  • USS Sentinel, a Defender-class bomber.
  • USS Sentinel, a Guardian-class support frigate.
  • USS Sentinel, an Interceptor-class fighter.

Miscellaneous

• Sentinel, a Romulan.
• Sentinel, a title in Ardanan society.
• Sentinel, a robot model in the early 21st century of a parallel reality