| Name: | Council of Europe |
| Foundation date: | 5 May 1949 |
| Headquarters: | Strasbourg (France) |
|
Flag of the Council of Europe since 1955 |
| 5 May 1949 | |
| 9 August 1949 | Greece |
| 30 March 1950 | Iceland |
| 13 April 1950 | Turkey |
| 13 July 1950 | Germany |
| 16 April 1956 | Austria |
| 24 May 1961 | Cyprus |
| 6 May 1963 | Switzerland |
| 29 April 1965 | Malta |
| 22 September 1976 | Portugal |
| 24 November 1977 | Spain |
| 23 November 1978 | Liechtenstein |
| 16 November 1988 | San Marino |
| 5 May 1989 | Finland |
| 6 November 1990 | Hungary |
| 29 November 1991 | Poland |
| 7 May 1992 | Bulgaria |
| 14 May 1993 | Estonia, Lithuania, Slovenia |
| 30 June 1993 | Czechia, Slovakia |
| 7 October 1993 | Rumania |
| 10 October 1994 | Andorra |
| 10 February 1995 | Latvia |
| 13 July 1995 | Albania, Moldavia |
| 9 November 1995 | Macedonia, Ukraine |
| 28 February 1996 | Russia |
| 6 November 1996 | Croatia |
| 27 April 1999 | Georgia |
| 25 January 2001 | Armenia, Azerbaijan |
| 24 April 2002 | Bosnia and Herzegovina |
| 3 April 2003 | Serbia and Montenegro |
