| Country | Independence |
| Cook Islands | none (became self-governing in free association with New Zealand on 4 August 1965 and has the right at any time to move to full independence by unilateral action) |
| Coral Sea Islands | void |
| Costa Rica | 15 September 1821 (from Spain) |
| Cote d'Ivoire | 7 August 1960 (from France) |
| Croatia | 25 June 1991 (from Yugoslavia) |
| Cuba | 20 May 1902 (from Spain 10 December 1898; administered by the US from 1898 to 1902); not acknowledged by the Cuban Government as a day of independence |
| Curacao | none (part of the Kingdom of the Netherlands) |
| Cyprus | 16 August 1960 (from the UK); note - Turkish Cypriots proclaimed self-rule on 13 February 1975 and independence in 1983, but these proclamations are only recognized by Turkey |
| Czech Republic | 1 January 1993 (Czechoslovakia split into the Czech Republic and Slovakia); note - although 1 January is the day the Czech Republic came into being, the Czechs generally consider 28 October 1918, the day the former Czechoslovakia declared its independence from the Austro-Hungarian Empire, as their independence day |
| Denmark | ca. 965 (unified and Christianized under HARALD I Gormson); 5 June 1849 (became a constitutional monarchy) |
| Dhekelia | void |
| Djibouti | 27 June 1977 (from France) |
| Dominica | 3 November 1978 (from the UK) |
| Dominican Republic | 27 February 1844 (from Haiti) |
| Ecuador | 24 May 1822 (from Spain) |
| Egypt | 28 February 1922 (from UK protectorate status; the revolution that began on 23 July 1952 led to a republic being declared on 18 June 1953 and all British troops withdrawn on 18 June 1956); note - it was ca. 3200 B.C. that the Two Lands of Upper (southern) and Lower (northern) Egypt were first united politically |