Castro Caldelas is a municipality in the province of Ourense, in the autonomous community of Galicia, Spain. It belongs to the comarca of Terra de Caldelas.
The municipality is located in the southeastern part of Galicia, within the Ourense province. Its administrative identity is defined by its status as a municipality (concello) and by its membership in the Terra de Caldelas comarca, a regional grouping used for administrative and territorial purposes in Galicia.
Castro Caldelas is one of the municipalities that make up the Terra de Caldelas comarca, sharing this designation with the other local councils of the area. As a Galician municipality, it forms part of the broader administrative structure of both the province of Ourense and the autonomous community of Galicia.