Seira (Spanish:[ˈsejɾa]; locally[ˈsejɾa]) is a municipality located in the Ribagorza comarca, province of Huesca, Aragon, Spain. According to the 2018 census the municipality has a population of 150 inhabitants.[2] Its postal code is 22463.
The town is located on the left side of the Ésera River in a very mountainous place.