São João da Pesqueira is a municipality and town situated in the district of Viseu in northern Portugal. As of the 2021 census, the municipality covers an area of 266.11 square kilometres and has a population of 6,775 residents.
The town is located within the civil parish of São João da Pesqueira e Várzea de Trevões, which recorded a population of 2,273 inhabitants in 2021. The municipality's current mayor is Manuel Cordeiro, who was elected by a citizens' movement, and its official municipal holiday is observed on June 24.