Ratified conventions by Cook Islands
- 1994 - Convention on the Prohibition of the development, production, stockpilling and use of chemical weapons
- 1997 - Convention on the Rights of the Child
- 2002 - 1st Geneva Convention for the Amelioration of the Condition of the Wounded and Sick in Armed Forces in the Field
- 2002 - 2nd Geneva Convention For the Amelioration of the Condition of Wounded, Sick and Shipwrecked Members of Armed Forces at Sea
- 2002 - 3rd Geneva Convention Relative to the Treatment of Prisoners of War
- 2002 - 4th Geneva Convention relative to the protection of civilian persons in time of war
- 2002 - Additional Protocol Relating to the Protection of Victims of International Armed Conflicts
- 2002 - Additional Protocol Relating to the Protection of Victims of Non-International Armed Conflicts
- 2006 - Convention on the Prohibition of the Use, Stockpilling, production and transfer and antipersonnel mines
- 2008 - Statute of the International Criminal Court
- 2011 - Convention on Cluster Munitions