Justí Guitart i Vilardebó (December 16, 1875 – January 30, 1940) reigned as the Bishop of Urgell and Episcopal Co-Prince of Andorra from 1920 to 1940.
Born in Barcelona, Vilaredbó was ordained as a priest in 1901, and was consecrated as Bishop of Urgell on May 23, 1920. He took the oath as Prince on July 27 of the same year. During his reign, numerous improvements, such as the introduction of electricity, the construction of roads, and establishment of Spanish post offices, came to Andorra.
Vilardebó died in Barcelona.