Oeiras (disambiguation)
Oeiras is
- a city in Portugal, see Oeiras
- a city in the Brazilian state of Piauí, see Oeiras (Piauí)
- a city in the Brazilian state of Pará, see Oeiras do Pará
- a tributary of the Guadiana in Portugal, see Oeiras (Guadiana)
- a diocese in the Brazilian state of Piauí, see Diocese of Oeiras
