Jo, jo, JO, or J.O. might refer to:

Arts and entertainment

Businesses and organizations

Names

Other uses

  • (), a wooden staff used in a few Japanese martial arts, about four Japanese feet long
  • (), a Japanese unit of length equivalent to the Chinese zhang, equal to ten Japanese feet
  • (), a Japanese unit of area corresponding to the area of a standard tatami mat (1×½ ken or 18 square Japanese feet)
  • JO, U.S. Navy rating abbreviation for "journalist"
  • Jordan (ISO country code)
    • .jo, the internet country code top-level domain (ccTLD) for the country of Jordan
  • Journal Officiel de la République Française, the official gazette of the Government of France