•
Office of Management and Budget, the largest office within the Executive Office of the President of the United States • OMB, a graphic design studio founded by
Oscar Mariné •
Ontario Municipal Board, an independent administrative board in the province of Ontario, Canada •
Optical Media Board, a national agency under the Office of the President of the Philippines •
Oregon Marching Band, the marching band of the University of Oregon •
Oregon Medical Board, state agency responsible for establishing the rules and regulations for medicine ==Other uses==