Sudan
1 January 1956 (from Egypt and UK)
Suriname
25 November 1975 (from Netherlands)
Svalbard
none (territory of Norway)
Swaziland
6 September 1968 (from UK)
Sweden
6 June 1523 (Gustav VASA elected king)
Switzerland
1 August 1291 (Founding of the Swiss Confederation)
Syria
17 April 1946 (from League of Nations mandate under French
administration)
Tajikistan
9 September 1991 (from Soviet Union)
Tanzania
26 April 1964; Tanganyika became independent 9 December
1961 (from UK-administered UN trusteeship); Zanzibar became
independent 19 December 1963 (from UK); Tanganyika united with
Zanzibar 26 April 1964 to form the United Republic of Tanganyika and
Zanzibar; renamed United Republic of Tanzania 29 October 1964
Thailand
1238 (traditional founding date; never colonized)