KIO (KDE Input/Output) is a system library incorporated into the KDE architecture.

KIO may also refer to:

• Kiō, a Japanese professional shogi title
• Kio, stage name of a Soviet magician dynasty
  • Emil Kio
  • Emil Kio, Jr. [ru]
  • Igor Kio
• Kachin Independence Organisation
• Keep Ireland Open, an organisation that campaigns for open access to the Irish countryside
• An abbreviation of Kibioctet, a unit of information or computer storage
• Kick It Out (organisation), an organisation that aims to keep racism out of football
• Kin On stop (MTR station code: KIO), Hong Kong
• Kuwait Investment Office, the London office of Kuwait Investment Authority
• Sida fallax (Marshallese: kio), a flowering plant in the Hibiscus family

People:

• Kio Yamada (山田 葵士, born 2000), Japanese footballer
• Shimoku Kio (木尾 士目, born 1974), a Japanese manga artist
• YoungKio, stage name of Dutch record producer Kiowa Roukema