EOO or Eoo may refer to:
Extent of occurrence, a concept in Occupancy–abundance relationship End of object, a type of operator in the computer data interchange format BSON Exchange of Options for Options, a kind of Exchange for Related Positions (EFRP) contrasted to an Exchange of futures for physicals Église Orthodoxe Occidentale, a group involved in Western Rite Orthodoxy in the Orthodox Church of France "Eoo" (song), a 2025 song by Bad Bunny from the album Debí Tirar Más Fotos