The member states of the African Union are the 55 sovereign states that have ratified or acceded to the Constitutive Act of the African Union to become member states to the African Union (AU). The AU was the successor to the Organisation of African Unity (OAU), and AU membership was open to all OAU member states.
From an original membership of 36 states when the OAU was established on 25 May 1963, there have been nineteen successive enlargements—the largest occurring on 18 July 1975 when four states joined. Morocco is the newest member state, having joined in January 2017. Morocco was a founder member of the OAU but withdrew in 1984 following the organization's acceptance of the Sahrawi Arab Democratic Republic as a member state. Morocco rules over most of the territory, but sovereignty is disputed.
As of 2017, the AU spans the entirety of the African continent, with the exception of Ceuta, Melilla, and the plazas de soberanía. Also excluded are offshore islands that are integral parts of the transcontinental countries of France, Portugal, Spain and Yemen. The 55 member states are grouped into five regions.
|Benin||1963-05-25||11,722,000||112,622||Porto-Novo||French||Known as Dahomey until 1975.|
|Burkina Faso||1963-05-25||20,000,000||274,000||Ouagadougou||French||Known as Upper Volta until 1984. Suspended in September 2015 after a brief military coup.|
|Central African Republic||1963-05-25||5,181,000||622,984||Bangui||Suspended from March 2013 to April 2016 during the 2012–present Central African Republic conflict|
|Democratic Republic of the Congo||1963-05-25||91,931,000||2,344,858||Kinshasa||French||Known as Zaire from 1971–1997.|
|Republic of the Congo||1963-05-25||4,500,000||342,000||Brazzaville||French|
|Egypt||1963-05-25||99,211,000||1,002,450||Cairo||Arabic||Suspended from July 2013 until June 2014|
following the 2013 Egyptian coup d'état
|Eritrea||1993-05-24||6,159,000||117,600||Asmara||Eritrea returned to the 53-member organization after several years' absence.|
|Eswatini||1968-09-24||1,177,000||17,364||Lobamba (royal and legislative)
|Known as Swaziland from 1968–2018.|
|Guinea||1963-05-25||13,627,000||245,857||Conakry||French||Suspended from 23 December 2008|
to January 2011
after a military coup.
|Guinea-Bissau||1973-11-19||1,776,000||36,544||Bissau||Portuguese||Suspended from April 2012 until June 2014|
following the 2012 Guinea-Bissau coup d'état.
|Ivory Coast||1963-05-25||26,275,000||322,460||Yamoussoukro||French||Suspended after the|
2010–2011 Ivorian crisis.
|Madagascar||1963-05-25||27,055,000||587,041||Antananarivo||Suspended from December 2001 – 10 July 2003 and from 20 March 2009 – 27 January 2014 after a political crisis.|
|Mali||1963-05-25||20,161,000||1,240,192||Bamako||French||Suspended from 23 March 2012 until October 2013 after a military coup.|
|Mauritania||1963-05-25||3,516,806||1,030,700||Nouakchott||Arabic||Suspended 4 August 2005 after a military coup. Presidential elections were held in March 2007. Suspended 6 August 2008 after a military coup.|
||35,587,000||446,550||Rabat||Withdrew from the AU's predecessor, the OAU, in 1984 when a majority of member states supported|
the admission of the Sahrawi Arab Democratic Republic, proclaimed by the Polisario Front in 1976 claiming representation of Western Sahara
which is claimed by Morocco, as an AU member. AU membership approved in January 2017.
|Niger||1963-05-25||20,000,000||1,267,000||Niamey||French||Suspended 8 February 2010 after a military coup.|
|Sahrawi Arab Democratic Republic (Western Sahara)||1982-02-22||267,405||266,000||El Aaiun (de jure claimed)
Tifariti (de facto temporary)
|São Tomé and Príncipe||1975-07-18||222,000||964||São Tomé||Portuguese|
|South Africa||1994-06-06||58,333,000||1,221,037||Pretoria (executive)
Cape Town (legislative)
|Sudan||1963-05-25||43,222,000||1,886,068||Khartoum||Suspended 6 June 2019 due to violence committed by the military following a coup d'état as part of the 2018–19 Sudanese protests. Suspension was lifted three months later on 6 September 2019.|
|Tanzania||1963-05-25||52,067,000||945,203||Dodoma||Zanzibar: Arabic)||Formed by a merger on 26 April 1964 of Tanganyika and Zanzibar, which had both become members on 25 May 1963.|
|Togo||1963-05-25||8,205,000||56,785||Lomé||French||Suspended 25 February 2005 after concerns over unconstitutional presidential appointment. Presidential elections were held 4 May 2005.|
||Former African Union State
||Years of membership
|Tanganyika||Tanganyika||1963–1964||49,000,000||942,433||Dar es Salaam||Swahili
|Tanganyika and Zanzibar merged on 26 April 1964 to|
form the United Republic of Tanganyika and Zanzibar,
which was renamed Tanzania on 1 November 1964
The AU's most recent member state is Morocco, having joined in January 2017. Morocco withdrew from the OAU in 1984 following the organization's acceptance of the Sahrawi Arab Democratic Republic as a member state. Morocco rules over most of the territory, but sovereignty is disputed.
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