Ciadoncha is a municipality located in the province of Burgos, in the autonomous community of Castile and León, Spain. It is one of the many small rural municipalities that make up this sparsely populated region of northern Spain.
According to the 2004 census conducted by the Instituto Nacional de Estadística (INE), Ciadoncha had a population of 99 inhabitants. This figure reflects the small, village-scale character typical of municipalities in the Burgos countryside.