Josa is a municipality in the province of Teruel, in the autonomous community of Aragon, Spain. It is a small, sparsely populated settlement in this inland region of northeastern Spain.
According to the 2004 census carried out by the Instituto Nacional de Estadística (INE), Josa had a population of 30 inhabitants. This makes it one of the many very small municipalities that characterise the rural interior of Teruel province.