 For many years, especially throughout much of the 20th century, the municipality was known by its Spanish name, San Juan Bautista.However, in 1981, following the establishment of the Autonomous Region of the Balearic Islands, where Catalan was the official language, all place names were reverted to their Catalan names, in this case it became Sant Joan de Labritja.The municipality is the least-populated municipality in Ibiza, and is almost entirely rural.