The Diocese of Calahorra and La Calzada-Logroño (Latin: Dioecesis Calaguritanus et Calceatensis – Lucroniensis )) is a Latin diocese of the Catholic Church located in the cities of Calahorra, Santo Domingo de la Calzada, and Logroño in the ecclesiastical province of Pamplona y Tudela in Spain.

[1][2] There are cathedrals in Calahorra, Santo Domingo de la Calzada and Logroño.

In 463, the Diocese of Calahorra was established.

In 1232, "y La Calzada" was added.

It became the Diocese of Calahorra y La Calzada – Logroño on 9 March 1959.