ONR

ONR may refer to:


 * Obóz Narodowo-Radykalny, three far-right fascist Polish nationalist organisations known as National Radical Camp
 * Office for Nuclear Regulation in the United Kingdom
 * Office of Naval Research of the U.S. Navy
 * ON-Regel, a standard by the Austrian Standards International
 * ONR, the ICAO airline code for Air One Nine Company, Libya
 * ONR., stage name of Scottish singer Robert Shields
 * Ontario Northland Railway in Ontario, Canada
 * Organisation for National Reconstruction, a defunct political party in Trinidad and Tobago
 * Otter Nelson River School, a high school in Manitoba, Canada