Castanheira
Castanheira (Portuguese: chestnut tree) may refer to the following places:
in Brazil
- 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
- 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