Senegal
4 April 1960 (from France); note - complete independence was
achieved upon dissolution of federation with Mali on 20 August 1960
Serbia
5 June 2006 (from Serbia and Montenegro)
Seychelles
29 June 1976 (from UK)
Sierra Leone
27 April 1961 (from UK)
Singapore
9 August 1965 (from Malaysian Federation)
Slovakia
1 January 1993 (Czechoslovakia split into the Czech
Republic and Slovakia)
Slovenia
25 June 1991 (from Yugoslavia)
Solomon Islands
7 July 1978 (from UK)
Somalia
1 July 1960 (from a merger of British Somaliland, which
became independent from the UK on 26 June 1960, and Italian
Somaliland, which became independent from the Italian-administered
UN trusteeship on 1 July 1960, to form the Somali Republic)
South Africa
31 May 1910 (from UK); note - South Africa became a
republic in 1961 following an October 1960 referendum