Captain

Captain is a rank, used in many military, paramilitary, and civilian contexts:
 * In many military organizations, including the United States Army and Air Force, captain is a commissioned officer rank superior to lieutenant.
 * In law enforcement and some federal agencies, a captain is a superior rank, often in charge of a station or precinct.
 * In civilian aviation, a captain is the chief pilot responsible for flying and navigating an aircraft.

Military

 * Jack Bauer &mdash; United States Army, First Special Operational Detachment, Delta
 * Clarke &mdash; United States Air Force
 * John Hansen &mdash; United States Air Force
 * Mike Murphy &mdash; United States Army, Delta Force
 * Reiss &mdash; United States Army, Delta Force
 * Riggs &mdash; United States Marine Corps
 * Jessica Schneider &mdash; United States Marine Corps, 3rd Marine Division
 * Jonathan Wallace &mdash; United States Marine Corps, Coral Snake unit

CTU field operations

 * Bill
 * Steve Goodrich

Police

 * Raskind &mdash; Los Angeles Police Department
 * Ravello &mdash; New York Police Department
 * Walleki &mdash; New York Police Department

Aviation

 * Butcher &mdash; CTU charter
 * Stan Cotter &mdash; Flight 520