List of parties to weapons of mass destruction treaties

The list of parties to weapons of mass destruction treaties encompasses the states which have signed and ratified, succeeded, or acceded to any of the major multilateral treaties prohibiting or restricting weapons of mass destruction (WMD), in particular nuclear, biological, or chemical weapons.

List of states parties to weapons of mass destruction treaties
The following list was last updated in March 2021.

Legend:


 * GP = Geneva Protocol
 * BWC = Biological Weapons Convention
 * CWC = Chemical Weapons Convention
 * NPT = Nuclear Non-Proliferation Treaty
 * TPNW = Treaty on the Prohibition of Nuclear Weapons
 * CTBT = Comprehensive Nuclear-Test-Ban Treaty


 * S = signing; R = ratification; A = accession; Su = succession; Ac = acceptance


 * Notes