word | | Constitution |
| Islands | Northern Mariana Islands | Constitution of the Commonwealth of the Northern Mariana Islands effective 1 January 1978; Covenant Agreement fully effective 4 November 1986 |
| Islands | Tokelau | administered under the Tokelau Islands Act of 1948; amended in 1970 |
| Islands | Turks and Caicos Islands | Turks and Caicos Islands Constitution (Interim Amendment) Order 2009, S.I. 2009/701 - effective 14 August 2009 - suspended Ministerial government, the House of Assembly, and the constitutional right to trial by jury, and imposed ... |
| Isle | Isle of Man | unwritten; note - The Isle of Man Constitution Act of 1961 does not embody the unwritten Manx Constitution |
| Israeli | Israel | ... filled by the Declaration of Establishment (1948), the Basic Laws of the parliament (Knesset), and the Israeli citizenship law; note - since May 2003 the Constitution, Law, and Justice Committee of the Knesset ... |
| issued | Oman | none; note - on 6 November 1996, Sultan QABOOS issued a royal decree promulgating a basic law considered by the government to be a constitution which, among other things, clarifies the royal succession ... |
| January | Afghanistan | sixth constitution drafted 14 December 2003-4 January 2004; signed 16 January 2004; ratified 26 January 2004 |
| January | Aruba | 1 January 1986 |
| January | Australia | 9 July 1900; effective 1 January 1901 |
| January | Brunei | 29 September 1959 (some provisions suspended under a State of Emergency since December 1962, others since independence on 1 January 1984) |
| January | Burkina Faso | approved by referendum 2 June 1991; formally adopted 11 June 1991; last amended January 2002 |
| January | Burma | 3 January 1974; suspended 18 September 1988; a new constitution took effect in March 2011 when a new parliament convened |
| January | Cameroon | approved by referendum 20 May 1972; adopted 2 June 1972; revised January 1996; amended April 2008 |
| January | Congo, Republic of the | approved by referendum 20 January 2002 |