The Republic of Macedonia joins the United Nations.

The United Nations (UN) is an intergovernmental organization whose purpose is to maintain international peace and security, develop friendly relations among nations, achieve international cooperation, and be a centre for harmonizing the actions of nations. It is the world's largest and most familiar international organization. The UN is headquartered on international territory in New York City, and has other main offices in Geneva, Nairobi, Vienna, and The Hague (home to the International Court of Justice).

The UN was established after World War II with the aim of preventing future wars, succeeding the rather ineffective League of Nations. On 25 April 1945, 50 governments met in San Francisco for a conference and started drafting the UN Charter, which was adopted on 25 June 1945 and took effect on 24 October 1945, when the UN began operations. Pursuant to the Charter, the organization's objectives include maintaining international peace and security, protecting human rights, delivering humanitarian aid, promoting sustainable development, and upholding international law. At its founding, the UN had 51 member states; with the addition of South Sudan in 2011, membership is now 193, representing almost all of the world's sovereign states.The organization's mission to preserve world peace was complicated in its early decades by the Cold War between the United States and Soviet Union and their respective allies. Its missions have consisted primarily of unarmed military observers and lightly armed troops with primarily monitoring, reporting and confidence-building roles. UN membership grew significantly following widespread decolonization beginning in the 1960s. Since then, 80 former colonies have gained independence, including 11 trust territories that had been monitored by the Trusteeship Council. By the 1970s, the UN's budget for economic and social development programmes far outstripped its spending on peacekeeping. After the end of the Cold War, the UN shifted and expanded its field operations, undertaking a wide variety of complex tasks.The UN has six principal organs: the General Assembly; the Security Council; the Economic and Social Council (ECOSOC); the Trusteeship Council; the International Court of Justice; and the UN Secretariat. The UN System includes a multitude of specialized agencies, funds and programmes such as the World Bank Group, the World Health Organization, the World Food Programme, UNESCO, and UNICEF. Additionally, non-governmental organizations may be granted consultative status with ECOSOC and other agencies to participate in the UN's work.

The UN's chief administrative officer is the secretary-general, currently Portuguese politician and diplomat Antnio Guterres, who began his first five year-term on 1 January 2017 and was re-elected on 8 June 2021. The organization is financed by assessed and voluntary contributions from its member states.

The UN, its officers, and its agencies have won many Nobel Peace Prizes, though other evaluations of its effectiveness have been mixed. Some commentators believe the organization to be an important force for peace and human development, while others have called it ineffective, biased, or corrupt.

North Macedonia (Macedonia before February 2019), officially the Republic of North Macedonia, is a country in Southeast Europe. It gained independence in 1991 as one of the successor states of Yugoslavia. North Macedonia is a landlocked country bordering with Kosovo to the northwest, Serbia to the north, Bulgaria to the east, Greece to the south, and Albania to the west. It constitutes approximately the northern third of the larger geographical region of Macedonia. Skopje, the capital and largest city, is home to a quarter of the country's 1.83 million population. The majority of the residents are ethnic Macedonians, a South Slavic people. Albanians form a significant minority at around 25%, followed by Turks, Romani, Serbs, Bosniaks, Aromanians and a few other minorities.

The history of the region begins with the kingdom of Paeonia, a mixed Thraco-Illyrian polity. In the late sixth century BC, the area was subjugated by the Persian Achaemenid Empire, then incorporated into the Kingdom of Macedonia in the fourth century BC. The Roman Empire conquered the region in the second century BC and made it part of the larger province of Macedonia. The area remained part of the Byzantine Empire, but was often raided and settled by Slavic tribes beginning in the sixth century of the Christian era. Following centuries of contention between the Bulgarian, Byzantine, and Serbian Empires, it was part of the Ottoman Empire from the mid-14th until the early 20th century, when, following the Balkan Wars of 1912 and 1913, the modern territory of North Macedonia came under Serbian rule.

During the First World War, the territory was ruled by Bulgaria, but after the end of the war it returned to being under Serbian rule as part of the newly formed Kingdom of Serbs, Croats and Slovenes. During the Second World War, it was ruled by Bulgaria again and in 1945 it was established as a constituent state of communist Yugoslavia, which it remained until its peaceful secession in 1991. The country became a member of the United Nations in April 1993, but as a result of a dispute with Greece over the name "Macedonia", it was admitted under the provisional description "the former Yugoslav Republic of Macedonia" (abbreviated as "FYR Macedonia" or "FYROM"). In June 2018, Macedonia and Greece resolved the dispute with an agreement that the country should rename itself "Republic of North Macedonia". This renaming came into effect in February 2019.

A unitary parliamentary constitutional republic, North Macedonia is a member of the UN, NATO, the Council of Europe, the World Bank, OSCE, CEFTA, BSEC and the WTO. Since 2005, it has also been a candidate for joining the European Union. North Macedonia is an upper-middle-income country and has undergone considerable economic reform since independence in developing an open economy. North Macedonia is a developing country, ranking 82nd on the Human Development Index, and provides a social security, universal health care system, and free primary and secondary education to its citizens.