IRB may refer to:

Organizations

  • Immigration and Refugee Board of Canada, a Canadian administrative tribunal
  • Indian Reserve Battalion, a special unit of the Indian Police Force
  • (Ruđer Bošković Institute), a Croatian research institute
  • Institutional review board, a committee to monitor research involving humans
  • Instituto de Resseguros do Brasil, a Brazilian reinsurance company
  • Instituto Ricardo Brennand, a museum in Recife, Brazil
  • International Rugby Board, the former name of World Rugby, the governing board of rugby union
  • IRB Infrastructure, an Indian road infrastructure company
  • Irish Republican Brotherhood, an Irish secret revolutionary society of the 19th and early 20th centuries

Technology

  • Interactive Ruby Shell, a shell for programming in Ruby
  • ASEA IRB, a line of industrial robots

Other

  • Ian Rank-Broadley, British sculptor and designer of the fourth coinage portrait of Elizabeth II
  • Inflatable rescue boat, a rubber boat with an outboard motor used in surf lifesaving
  • IRB racing
  • Indian Rocks Beach, a city in Pinellas County, Florida
  • Internal ratings-based approach (credit risk), a method for estimating bank capital requirements
  • Internal Revenue Bulletin, a weekly publication of the U.S. Internal Revenue Service