The branch serves over 135 countries and comprises a New York-based office as well as three UN Regional Centres for Peace and Disarmament:

• The UN Regional Centre for Peace, Disarmament and Development in Latin America and the Caribbean (UNLIREC, located in Lima, Peru),
• The UN Regional Centre for Peace and Disarmament in Asia and the Pacific (UNRCPD, located in Kathmandu, Nepal), and
• The UN Regional Centre for Peace and Disarmament in Africa (UNREC, located in Lomé, Togo).