The town hall of Leoz is part of Vale of the Valdorba. It is formed by the places or councils of Amatriain, Amunarrizqueta, Artariain, Benegorri, Bézquiz, Iracheta (capital and head office adaministrativa), Leoz, Maquirriain, Olleta, Sansoain, Sansomain, Uzquita  

In the municipal term remains have appeared archaeological fechables in the Ages of the Bronze and of the Iron.
During the Average age several places existed later deserted places.
Along the history, the municipality has been becoming depopulated. despoblamiento ancient he explains himself partly for the social structure with plenty of private dominions and scarcity of resources. Her church of San Esteban is a building of medieval origin with important transformations realized in the XVIth and XVIIth centuries. In a niche placed in the side of the epistle there is crucified in polychrome wood of elongated canon and powerful musculature, prelude of the romanismo influenced by Anchieta.