The United Nations Relief and Works Agency for Palestine Refugees in the Near East is a UN agency that supports the relief and human development of Palestinian refugees. UNRWA's mandate encompasses Palestinians who fled or were expelled during the Nakba, the 1948 Palestine War, and subsequent conflicts, as well as their descendants, including legally adopted children. As of 2019, more than 5.6 million Palestinians are registered with UNRWA as refugees.

The United Nations System consists of the United Nations' six principal bodies, the Specialized Agencies and related organizations. The UN System includes subsidiary bodies such as the separately administered funds and programmes, research and training institutes, and other subsidiary entities. Some of these organizations predate the founding of the United Nations in 1945 and were inherited after the dissolution of the League of Nations.