International Olympic Committee
- Maison Olympique, 1007 Lausanne, Switzerland
International Organization for Standardization
- Chemin de Blandonnet 8, 1214 Vernier, Switzerland
International Peace Bureau
- 41 Rue de Zurich, 1201 Geneva, Switzerland
International Seabed Authority
- 14-20 Port Royal Street, Kingston, Jamaica
Inter-Parliamentary Union
- Chemin du Pommier 5, 1218 Le Grand-Saconnex, Switzerland
League of Arab States
- Al Tahrir Square, Cairo 11511, Egypt