Pioz is a municipality in the province of Guadalajara, within the autonomous community of Castile-La Mancha, Spain. It lies in the central part of the country, in the region historically known as Castile.
As a municipality, Pioz is one of the many small administrative units that make up the province of Guadalajara. The province itself forms part of Castile-La Mancha, one of Spain's seventeen autonomous communities.