The United Nations Economic and Social Council (ECOSOC) (French: Le Conseil économique et social des Nations unies; CÉSNU) constitutes one of the six principal organs (one is not active as of 2011) of the United Nations. It is responsible for coordinating the economic, social and related work of 14 UN specialized agencies, their functional commissions and five regional commissions. ECOSOC has 54 members; it holds a four-week session each year in July. Since 1998, it has also held a meeting each April with finance ministers heading key committees of the World Bank and the International Monetary Fund (IMF). The ECOSOC serves as the central forum for discussing international economic and social issues, and for formulating policy recommendations addressed to member states and the United Nations system.

The Economic and Social Council Chamber in the United Nations Conference Building was a gift from Sweden. It was conceived by Swedish architect Sven Markelius, one of the 11 architects in the international team that designed the UN headquarters. Wood from Swedish pine trees was used in the delegates' area for the railings and doors. The pipes and ducts in the ceiling above the public gallery were deliberately left exposed; the architect believed that anything useful could be left uncovered. The "unfinished" ceiling is a symbolic reminder that the economic and social work of the United Nations is never finished; there will always be something more which can be done to improve living conditions for the world's people.