Prisoner may refer to one of the following:

• A person incarcerated in a prison or similar facility
• Prisoner of war, a soldier in wartime, held as by an enemy
• Political prisoner, someone held in prison for their ideology
• Hostage held to ransom, not necessarily in a prison or similar facility

In television:

• Prisoner (TV series), an Australian soap opera (known as Prisoner Cell Block H in the UK)
• The Prisoner, a British television series