Oklahoma City was an American city located in central Oklahoma.
A few years before the events of Trinity, the city was victimized in a notorious bombing, perpetrated by Timothy McVeigh. (Trinity, Veto Power)
While undercover during Chaos Theory, Jack Bauer's cover was that of a middleman for a dealer based in Oklahoma City. (Chaos Theory)
The city was one of the many potential targets for Habib Marwan during the Day 4 attacks. ("Day 4: 3:00am-4:00am")