It is erected under the Apostolic Constitution "Qui Aeque" of Pope John XXIII on July 22, 1961, named in Latin as "Pluviensis". derives from the meaning of the name of the city of Tilarán: a place where it rains.
It comprised the territories of the provinces of Guanacaste, Puntarenas and Alajuela. On July 25, 1995 in the Bull "Maiori Cristifidelium Bono" of Pope John Paul II established the Diocese of Ciudad Quesada, integrating into this new diocese the territory of the province of Alajuela, except the area known as Upala, part of this diocese.
In the Bull "Sacrorum Antistites" of April 17, 1998, the Diocese of Puntarenas was established, integrating the territory of the Province of Puntarenas into the new diocese.
This area is characterized by the conservation of biodiversity, with more than 1470 km² protected from protected forest and fauna, in addition, it has historical buildings for the history of the country such as Hacienda Santa Rosa and the Colonial Church of Nicoya.
Monsignor Bishop Manuel Eugenio Salazar Mora Bishop of the Diocese of Tilarán Liberia
He has obtained a Bachelor’s Degree in Fundamental Theology at the Pontifical Gregorian University in Rome. He was ordained a priest on December 4, 1982. He served as Director of the Department for Religious Education of the Ministry of Public Education and the Episcopal Conference, Director of the Introductory Seminary, and rector of the National Seminary. On February 6, 2016, Pope Francis appointed him as IV Bishop of the Diocese of Tilarán-Liberia, Costa Rica. He received his episcopal ordination on April 4, 2016, in the Cathedral of Tilarán, Costa Rica.
Under the civil limits, it spans the province of Guanacaste and Upala, canton Alajuelense
Constituted Diocese on
July 22, 1961