Mongolia

Nuclear-weapon-free state

Voted in favour of adopting TPNW

Has not yet joined TPNW

Mongolia has not yet signed or ratified the Treaty on the Prohibition of Nuclear Weapons. 

The government of Mongolia announced in October 2019 that it “is planning to accede to the [treaty] in the near future”.

Mongolia participated in the negotiation of the treaty at the United Nations in New York in 2017 and voted in favour of its adoption.


In an address to the United Nations in September 2017, the then-minister for foreign affairs of Mongolia, Tsend Munkh-Orgil, welcomed the adoption of the treaty, noting that “[c]urrent tensions have only deepened the concern associated with nuclear weapons”.

Mongolia voted in favour of a UN General Assembly resolution in 2019 that welcomed the adoption of the treaty and called upon “all states that have not yet done so to sign, ratify, accept, approve, or accede to the treaty at the earliest possible date”.

In its opening statement to the negotiating conference, Mongolia expressed hope that the treaty-making process would “establish a strong, robust but effective legally binding instrument to prohibit nuclear weapons, leading towards their total elimination”.

In 2016, Mongolia voted in favour of the UN General Assembly resolution that established the formal mandate for states to commence the negotiations in 2017 on “a legally binding instrument to prohibit nuclear weapons, leading towards their total elimination”.

Mongolia was among 127 states that endorsed a “humanitarian pledge” in 2015–16 to cooperate “in efforts to stigmatise, prohibit, and eliminate nuclear weapons”. The pledge was instrumental in building momentum and support for convening the negotiations.

In 1992, Mongolia declared itself a single-state nuclear-weapon-free zone. 


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