Olba is a municipality in the province of Teruel, within the autonomous community of Aragon, Spain. It is a small, rural settlement typical of the sparsely populated uplands of the Teruel region in northeastern Spain.
According to the 2005 census conducted by Spain's National Statistics Institute (INE), Olba had a population of 233 inhabitants. This figure reflects the low population density characteristic of many municipalities in the Teruel province.