- Obere Donaustrasse 93, 1020 Vienna, Austria
- Tel: +43 1 211 12/0 Fax: +43 1 216 4320 Tlx: 134474
OPEC's headquarters were in Geneva, Switzerland, from 21st January, 1961 (1380 AH), through to August 1965 (1385 AH), when they moved to Vienna. Both sites were chosen because of the host countries' political neutrality.
