Tanzania became a member of the United Nations on 14th December 1961. It should be however noted that Tanganyika was a member of the United Nations from 14 December 1961 and Zanzibar was a Member from 16 December 1963. Following the ratification on 26 April 1964 of Articles of Union between Tanganyika and Zanzibar, the United Republic of Tanganyika and Zanzibar continued as a single member, changing its name to the United Republic of Tanzania on 1 November 1964.
The United Republic of Tanzania participates in the following principal organs of the United Nations:
- General Assembly
- Security Council
- Economic and Social Council (ECOSOC)
The United Republic of Tanzania is currently a member in the following organizations of the United Nations:
- United Nation Environment Programme (UNEP) 2004-2007
- United Nations High Commission for Refugee (UNHCR)
- World Food Programme (WFP)
- United Nations Educational
- Scientific, and Cultural Organization (UNESCO) 2001-2005
- International Telecommunication Union (ITU) 2002-2006
- World Meteorological Organization (WMO) 2002-2006
The United Republic of Tanzania has been a member in the following United Nations organizations:
- United Nations Children’s Fund (UNICEF) 1976-1979, 1991-1994
- United Nations Development Program (UNDP) 1998-2000
- Global Environment Facility (GEF) 1996
- International Labour Organization (ILO) 1975-1978, 1987-1990, 1999-2000
- Food and Agriculture Organization (FAO) 1969-1971, 1979-1982,1985-1988, 1991-1993
- United Nations Human Settlement Programme (UN-HABITAT) 2001-2004
- World Health Organization (WHO) 1975-1978, 1993-1996
- International Civil Aviation Organization (ICAO) 1977-1980, 1983-1995
- Universal Postal Union (UPU) 1989-1999
- United Nations Industrial Development Organization (UNIDO) December 2003
- International Bank for Reconstruction and Development (IBRD) March 2004
- International Development Association (IDA) May 2004
- International Finance Corporation (IFC) March 2004
- International Atomic Energy Agency (IAEA) 1978-1980