The co-princes of Andorra represent a unique diarchical system of joint heads of state for the Principality of Andorra, a landlocked microstate situated in the Pyrenees mountains between France and Spain. This political arrangement was originally established in 1278 through a treaty negotiated between the Bishop of Urgell and the Count of Foix, and the system has survived continuously from the Middle Ages to the present day.
Following historical shifts, the claims originally held by the Count of Foix were transferred to the French Crown and eventually to the presidency of the French Republic. Under the current structure, the Bishop of Urgell serves as the episcopal co-prince, while the President of France serves as the lay co-prince. Both positions utilize personal representatives to manage their administrative duties.
