history
Oiã is a civil parish in the municipality of Oliveira do Bairro, in the district of Aveiro, covering 26.74 km² and home to 7,862 inhabitants (2021 census). It was granted town status by Law no. 42/89, of 24 August 1989. The settlements of Águas Boas, Giesta, Malhapão, Perrães, Rego, Silveira and Silveiro are part of the parish. The Igreja de São Simão (Church of São Simão) is the parish church of Oiã.
