Alter do Chão is a municipality in Portugal, in Portalegre district, in the Alentejo. At the 2021 census it had 3,046 inhabitants over an area of 362.0 km².
With about 8 inhabitants per km², it is a sparsely populated area of countryside, small villages and wide open spaces, typical of inland Portugal. Of the 15 municipalities in Portalegre district, it is number 11 by population.
As the crow flies it lies about 31 km west of Portalegre, the capital. The nearest major city is Évora, about 75 km away.
Nearby, within a few dozen kilometres, are other destinations featured in our guides: Portalegre (28 km), Castelo de Vide (32 km), Marvão (36 km), Estremoz (44 km).
Below you will find a map of neighbouring municipalities, the weather, places to stay in the area and a link to all the municipalities in Portalegre district.