The Constitution of Bhutan (Dzongkha: འབྲུག་གི་རྩ་ཁྲིམས་ཆེན་མོ་; Wylie: 'Druk-gi cha-thrims-chen-mo) was enacted 18 July 2008 by the Royal Government of Bhutan. The Constitution was thoroughly planned by several government officers and agencies over a period of almost seven years amid increasing democratic reforms in Bhutan. The current Constitution is based on Buddhist philosophy, international Conventions on Human Rights, comparative analysis of 20 other modern constitutions, public opinion, and existing laws, authorities, and precedents. According to Princess Sonam Wangchuck, the constitutional committee was particularly influenced by the Constitution of South Africa because of its strong protection of human rights.
On 4 September 2001, King Jigme Singye Wangchuck briefed the Lhengye Zhungtshog (Council of Ministers, or Cabinet), the Chief Justice, and the Chairman of the Royal Advisory Council on the need to draft a formal Constitution for the Kingdom of Bhutan. The King expressed his desire that the Lhengye Zhungtshog and the Chief Justice should hold discussions on formulating the Draft Constitution. While Bhutan did not have a formal Constitution, the King believed all the principles and provisions of a Constitution were covered under the various written laws and legislation which guided the actions of the King and the functioning of the Royal Government, the judiciary and the National Assembly of Bhutan. Nevertheless, with the country and the people having successfully achieved a high level of development and political maturity, the time had come for a formal Constitution for the Kingdom of Bhutan.