A refugee, generally speaking, is a displaced person who has crossed national boundaries and who cannot or is unwilling to return home due to well-founded fear of persecution. Such a person may be called an asylum seeker until granted refugee status by the contracting state or the United Nations High Commissioner for Refugees (UNHCR) if they formally make a claim for asylum.

The lead international agency coordinating refugee protection is the United Nations Office of the UNHCR. The United Nations has a second office for refugees, the United Nations Relief and Works Agency (UNRWA), which is solely responsible for supporting the large majority of Palestinian refugees.