| United Nationsmembership | |
|---|---|
| Membership | Full member |
| Since | November 7, 1945 (1945-11-07) |
| UNSC seat | Non-permanent |
| Permanent Representative | Héctor Vasconcelos |
Mexico is one of the 51 founding members of theUnited Nations and was admitted into the organization in 1945. Since then, Mexico is a full member of all the UN agencies and participates actively within the organization and has diplomatic relations with most member states.[1]

On 26 June 1945, Mexico was represented inSan Francisco byEzequiel Padilla Peñaloza,Francisco Castillo Nájera andManuel Tello Baurraud in the signing of theUnited Nations Charter. The country was formally admitted into the organization on 7 November 1945.[1]
Since the beginning, Mexico has participated actively in the social and economic activities of the UN's various specialized agencies and other international organizations concerned with social, cultural, and economic improvement. However, due to restraints in theMexican constitution, Mexico is prohibited from contributing troops forpeacekeeping missions abroad unless Mexico has formally declared war on a country. Calls have been made from Mexican politicians to amend the constitution (mainly article 76) in order to partake in UN peacekeeping missions.[2] This situation started to change after PresidentEnrique Peña Nieto's address to theGeneral Assembly on 24 September 2014, when he stated that "Mexico has taken the decision to participate in U.N. peacekeeping missions, taking part in humanitarian tasks that benefit civil society".[3]
Mexico has been elected five times to theUnited Nations Security Council. The Mexican Government is vehemently opposed to adding new members to the Security Council. Mexico and eight other countries created a group called the "Uniting for Consensus" (also known as theCoffee Club), where they are opposed to new permanent members, however they would like to raise the number of more non-permanent members to 20.[4]
List of terms as an elected member to the Security Council:[5]

Mexico maintains permanent representation to the United Nations headquarters inNew York City and to the other main UN agencies based inGeneva,Nairobi,Paris,Rome andVienna.[6]