Country Profile: Sao Tome and Principe


The Democratic Republic of São Tomé and Príncipe is an island country located off the western coast of Africa that shares maritime borders with Equatorial Guinea, Gabon, and Nigeria. Sao Tome and Principe is a semi-presidential representative democratic republic that gained its independence in 1975.

Capital: São Tomé

There are no nuclear power plants or research reactors in São Tomé and Príncipe.


  • Member of Non-Aligned Movement (NAM) since 1976
  • Signed Anti-Personnel Mine Ban Convention in 1998
    • Ratified in 2003
  • Signed Arms Trade Treaty in 2014
  • Acceded to Biological Weapons Convention (BWC) in 1979
  • Acceded to Chemical Weapons Convention (CWC) in 2003
  • Signed Comprehensive Nuclear Test Ban Treaty (CTBT) in 1996
  • Signed Convention on Cluster Munitions in 2008
    • Ratified in 2020
  • Acceded to Convention on Environmental Modification Techniques (ENMOD) in 1979
  • Signed Kinshasa Convention in 2010
    • Ratified in 2017
  • Acceded to Sea-bed Treaty in 1979
  • Signed International Convention for the Suppression of Acts of Nuclear Terrorism (ICSANT) in 2005
  • Signed Treaty of Pelindaba 1996
  • Acceded to Treaty for the Nonproliferation of Nuclear Weapons (NPT) in 1983
  • Signed Treaty for the Prohibition of Nuclear Weapons (TPNW) in 2017


  • Member of the African Group
  • Member of the G-77


UN State Summary

Ratification of Treaties & Membership in International Organizations Related to Disarmament