The Constitution of Andorra (Catalan: Constitució d'Andorra) is the supreme law of the Principality of Andorra. It was adopted on 2 February 1993 and given assent by the Andorran people in a referendum on 14 March 1993. According to the Constitution itself, it was to enter into force on the day of its publication in the Butlletí Oficial del Principat d'Andorra, which occurred on 28 April 1993.
The Constitution was signed by Andorra's two co-princes, the President of France, and the Bishop of Urgell, who at that time were François Mitterrand and Joan Martí Alanis respectively. The new constitution stipulates that these two officials are Andorra's heads of state. Indeed, this arrangement has existed for centuries, although at one time, the French king held the position now held by the French president.