The United Nations Office (UNO) on Drugs and Crime is a United Nations office that was established in 1997 as the Office for Drug Control and Crime Prevention by combining the United Nations International Drug Control Program (UNDCP) and the Crime Prevention and Criminal Justice Division in the United Nations Office at Vienna, adopting the current name in 2002.

The United Nations Office at Vienna (UNOV) is one of the four major office sites of the United Nations where numerous different UN agencies have a joint presence. The office complex is located in Vienna, the capital of Austria, and is part of the Vienna International Centre, a cluster of several major international organizations. UNOV was established on 1 January 1980, and was the third such complex to be created.