Sentinel

Sentinel could refer to:
 * Marcus Langston, Code name Sentinel; a comic book superhero and member of Youngblood.
 * Karima Shapandar, Code name Omega Sentinel; Comic book superhero and member of Excalibur.
 * Alan Scott, Also known as the original Green Lantern; Went by the name of Sentinel during the early-mid 1990s.
 * Jacob Roseman, Israeli action hero; member of U.N. Force.
 * Sentinels, A series of robots used for hunting down mutants.
 * Sentinel A-7, A Mk III Sentinel and foe of the Falcon.
 * Tri-Sentinel, A mutated combination of 3 Mk III Sentinels; foe of Cyclops.
 * Wild Sentinels, An upgraded model of Sentinel; Deployed to destroy Genosha.
 * Sentinel Squad O.N.E., A team of manned Sentinels.