Castanheira (Portuguese: chestnut tree) may refer to the following places:
in Brazil
edit- Castanheira, Mato Grosso, a municipality in the State of Mato Grosso
- Castanheira, Belém, a neighbourhood of the city of Belém, in the State of Pará
in Portugal
edit- Castanheira (Guarda), a civil parish in the municipality of Guarda
- Castanheira (Mogadouro), a civil parish in the municipality of Mogadouro
- Castanheira (Paredes de Coura), a civil parish in the municipality of Paredes de Coura
- Castanheira (Trancoso), a parish in Trancoso Municipality, Portugal
- Castanheira, a locality of the civil parish of Cós, in the municipality of Alcobaça
- Castanheira de Pera, a municipality in the district of Leiria
- Castanheira de Pera (parish), a civil parish in the municipality of Castanheira de Pera
- Castanheira do Ribatejo, a civil parish in the municipality of Vila Franca de Xira
- Castanheira do Vouga, a civil parish in the municipality of Águeda