Castelo de Paiva is a municipality in Portugal, in Aveiro district, in the Beiras, in central Portugal. At the 2021 census it had 15,597 inhabitants over an area of 115.0 km².
With about 136 inhabitants per km², it combines a medium-sized town with villages and farmland. Of the 19 municipalities in Aveiro district, it is number 17 by population.
As the crow flies it lies about 50 km north-east of Aveiro, the capital. The nearest major city is Porto, about 30 km away.
Nearby, within a few dozen kilometres, are other destinations featured in our guides: Arouca (12 km), Santa Maria da Feira (23 km), Vila Nova de Gaia (29 km), Porto (31 km), Amarante (34 km).
To explore the area, use the map of neighbouring municipalities and the accommodation options in and around Castelo de Paiva; all the municipalities in Aveiro district are listed on their own page.