| Country | Constitution |
| Cambodia | promulgated 21 September 1993 |
| Cameroon | 20 May 1972 approved by referendum, adopted 2 June 1972; revised January 1996 |
| Canada | made up of unwritten and written acts, customs, judicial decisions, and traditions; the written part of the constitution consists of the Constitution Act of 29 March 1867, which created a federation of four provinces, and the Constitution Act of 17 April 1982, which transferred formal control over the constitution from Britain to Canada, and added a Canadian Charter of Rights and Freedoms as well as procedures for constitutional amendments |
| Cape Verde | 25 September 1992; a major revision on 23 November 1995 substantially increased the powers of the president; a 1999 revision created the position of national ombudsman (Provedor de Justica) |
| Cayman Islands | 1959; revised 1962, 1972, and 1994 |
| Central African Republic | ratified by popular referendum 5 December 2004; effective 27 December 2004 |
| Chad | passed by referendum 31 March 1996; a June 2005 referendum removed constitutional term limits |
| Chile | 11 September 1980, effective 11 March 1981; amended 1989, 1991, 1997, 1999, 2000, 2003, and 2005 |
| China | most recent promulgation 4 December 1982 |
| Christmas Island | Christmas Island Act of 1958-59 (1 October 1958) as amended by the Territories Law Reform Act of 1992 |
| Clipperton Island | void |
| Cocos (Keeling) Islands | Cocos (Keeling) Islands Act of 1955 (23 November 1955) as amended by the Territories Law Reform Act of 1992 |
| Colombia | 5 July 1991; amended many times |
| Comoros | 23 December 2001 |
| Congo, Democratic Republic of the | 18 February 2006 |
| Congo, Republic of the | approved by referendum 20 January 2002 |
| Cook Islands | 4 August 1965 |
| Coral Sea Islands | void |
| Costa Rica | 7 November 1949 |
| Cote d'Ivoire | approved by referendum 23 July 2000 |
| Croatia | adopted on 22 December 1990; revised 2000, 2001 |
| Cuba | 24 February 1976; amended July 1992 and June 2002 |
| Cyprus | 16 August 1960 note: from December 1963, the Turkish Cypriots no longer participated in the government; negotiations to create the basis for a new or revised constitution to govern the island and for better relations between Greek and Turkish Cypriots have been held intermittently since the mid-1960s; in 1975, following the 1974 Turkish intervention, Turkish Cypriots created their own constitution and governing bodies within the "Turkish Federated State of Cyprus," which became the "Turkish Republic of Northern Cyprus (TRNC)" when the Turkish Cypriots declared their independence in 1983; a new constitution for the "TRNC" passed by referendum on 5 May 1985, although the "TRNC" remains unrecognized by any country other than Turkey |
| Czech Republic | ratified 16 December 1992, effective 1 January 1993 |
| Denmark | 5 June 1953 constitution allowed for a unicameral legislature and a female chief of state |
| Dhekelia | Sovereign Base Areas of Akrotiri and Dhekelia Order in Council 1960, effective 16 August 1960, functions as a basic legal document |
| Djibouti | multiparty constitution approved by referendum 4 September 1992 |
| Dominica | 3 November 1978 |
| Dominican Republic | 28 November 1966; amended 25 July 2002 |
| Ecuador | 10 August 1998 |
| Egypt | 11 September 1971; amended 22 May 1980, 25 May 2005, and 26 March 2007 |
| El Salvador | 20 December 1983 |
| Equatorial Guinea | approved by national referendum 17 November 1991; amended January 1995 |
| Eritrea | a transitional constitution, decreed on 19 May 1993, was replaced by a new constitution adopted on 23 May 1997, but not yet implemented |
| Estonia | adopted 28 June 1992 |
| Ethiopia | ratified 8 December 1994, effective 22 August 1995 |
| Europa Island | void |