ONU may refer to:
*
United Nations
The United Nations (UN) is the Earth, global intergovernmental organization established by the signing of the Charter of the United Nations, UN Charter on 26 June 1945 with the stated purpose of maintaining international peace and internationa ...
in other languages, e.g. French ''Organisation des Nations Unies'', Spanish ''Organización de las Naciones Unidas'' and Portuguese ''Organização das Nações Unidas''
*
Olivet Nazarene University
*
Ohio Northern University
*
Optical Network Unit, the IEEE term for
Optical Network Terminal
*
Order of Nunavut
*
Organizacion de Narcotraficantes Unidos, a Puerto Rican criminal organization
*
Onu (pronoun), Polish neopronoun
{{disambig