Jack Bauer is the protagonist of the American television series 24 (24 (TV series)). His character has worked in various capacities on the show, often as a member of the fictional Counter Terrorist Unit (CTU) based in Los Angeles, but also for other government agencies and in other jurisdictions.

Within the 24 storyline, Bauer is a key member of CTU and is often portrayed as their most capable agent. Bauers job usually involves helping prevent major terrorist attacks on the United States, saving both civilian lives and government administrations. On many occasions Jack does so at great personal expense, as those he thwarts subsequently target him and his loved ones. Bauers frequent use of torture to gather information has generated much controversy and discussion (Critical_reaction_to_24_(TV_series)#Torture). Entertainment Weekly named Jack Bauer one of The 20 All Time Coolest Heroes in Pop Culture.

Actor Kiefer Sutherland portrays Jack Bauer in the television show and video game. The television series ended on May 24, 2010 after 8 successful seasons. A feature film is now underway.