High treason is criminal disloyalty to one's government.

Look up high treason in Wiktionary, the free dictionary.

High Treason may also refer to:

• High Treason, a 1927 play by Noel Pemberton Billing
• High Treason (1929 British film), an adaptation of Billing's play, by Maurice Elvey
• High Treason (1929 German film), a silent film directed by Johannes Meyer
• High Treason (1951 film), a British espionage thriller by Roy Boulting
• "High Treason" (The Adventures of Brisco County, Jr.), a 1994 two-part TV episode
• "High Treason" (BMF), a 2023 TV episode of BMF

• Act of War: High Treason, a 2006 expansion pack for the video game Act of War: Direct Action
• "High Treason", a 1966 short story by Poul Anderson
• "High Treason", a song by Memorain from White Line

• High Treason Incident, a 1910 plot to assassinate the Japanese Emperor Meiji
• Treason (disambiguation)
• Traitor (disambiguation)

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