The following is a list of countries attending the 2014 Hague Nuclear Security Summit and their national regulators. All websites are in English unless otherwise noted.
- Algeria: Nuclear Regulatory Agency (website forthcoming)
- Argentina: Nuclear Regulatory Authority (Spanish)
- Armenia: Armenian Nuclear Regulatory Authority (Armenian)
- Australia: Australian Radiation Protection and Nuclear Safety Agency (ARPANSA);Australian Safeguards and Non-Proliferation Office (ASNO)
- Azerbaijan: State Agency on Nuclear and Radiological Activities Regulation (SANRAR) (no website)
- Belgium: Federal Agency for Nuclear Control (FANC)(Dutch);ONDRAF (National Agency for Radioactive Waste and Enriched Fissile Materials)(Dutch)
- Brazil: Comissao Nacional de Energia Nuclear (CNEN) (Portuguese)
- Canada: Canadian Nuclear Safety Commission (CNSC)
- Chile: Chilean Nuclear Energy Commission (CCHEN) (Spanish)
- China: China Atomic Energy Authority (CAEA);National Nuclear Safety Administration (Chinese)
- Czech Republic: State Office for Nuclear Safety (SUJB)
- Denmark: National Institute of Radiation Protection
- Egypt: Nuclear and Radiological Regulatory Authority (NRRA) (website forthcoming)
- Finland: Radiation and Nuclear Safety Authority (STUK)
- France: Nuclear Safety Authority (ASN)
- Gabon: Gabonese Agency for Safety and Nuclear Safety (AGSSN) (no website)
- Georgia: Ministry of Environment and Natural Resources Protection (no website)
- Germany: Federal Ministry for the Environment, Nature Conservation, Building and Nuclear Safety;Federal Office for Radiation Protection
- Hungary: Hungarian Atomic Energy Authority (HAEA)
- India: Department of Atomic Energy
- Indonesia: Nuclear Energy Regulatory Agency (BAPETEN)
- Israel: Israel Atomic Energy Commission (IAEC)
- Italy: Ministry of Economic Development;Institute for Environmental Protection and Research
- Japan: Nuclear Regulatory Authority (NRA); Japan Atomic Energy Commission
- Jordan: Jordan Nuclear Regulatory Commission
- Kazakhstan: Atomic Energy Agency of Kazakhstan (no website)
- Lithuania: Lithuanian Nuclear Power Safety Inspectorate (VATESI)
- Malaysia: Atomic Energy Licensing Board
- Morocco: Nuclear Safety Authority (NSA) (no website); National Centre of Radiation Protection (CNRP) (no website)
- Mexico: Ministry of Energy(Spanish);National Commission on Nuclear Safety and Safeguards(CNSNS) (Spanish)
- Netherlands: Ministry of Economic Affairs;Department of Nuclear Safety, Security & Safeguards (no website)
- New Zealand: Ministry of Health, Office of Radiation Safety
- Nigeria: Nigerian Nuclear Regulatory Authority
- Norway: Norwegian Radiation Protection Authority (NRPA)
- Ukraine: State Nuclear Regulatory Inspectorate
- Pakistan: Pakistan Nuclear Regulatory Authority
- Philippines: Philippine Nuclear Research Institute, Department of Science and Technology (PNRI DSOT)
- Poland: National Atomic Energy Agency
- Republic of Korea: Nuclear Safety and Security Commission
- Romania: The National Commission for Nuclear Activities Control
- Russian Federation: ROSATOM State Atomic Energy Corporation;Federal Environmental, Industrial and Nuclear Supervision Service of Russia
- Saudi Arabia: Saudi Arabian Atomic Regulatory Authority (website forthcoming)
- Singapore: Radiation Detection and Nuclear Science Department (RPNSD)
- South Africa: National Nuclear Regulator;Department of Energy
- Spain: Nuclear Safety Council
- Sweden: Swedish Radiation Safety Authority
- Switzerland: Swiss Federal Nuclear Safety Inspectorate
- Thailand: Office of Atoms for Peace (OAP)
- Turkey: Turkish Atomic Energy Authority
- United Kingdom: Office for Nuclear Regulation
- United Arab Emirates: Federal Authority for Nuclear Regulation
- United States: U.S. Nuclear Regulatory Commission
- Vietnam: Vietnam Atomic Energy Agency
- European Union (observer; President of the European Council and President of the European Commission): European Union
- International Atomic Energy Agency (IAEA) (observer): IAEA
- Interpol (observer): Interpol
- United Nations (observer): United Nations