ARBA can refer to:

  • Ariba (Nasdaq stock symbol: ARBA), an American software and information technology services company
  • American Rabbit Breeders' Association
  • American Rare Breed Association, an American kennel club
  • American Revolution Bicentennial Administration, the government office that coordinated the United States Bicentennial celebrations.
  • Army Review Boards Agency
  • Arba Sicula Organization