Oeiras

Oeiras may refer to:

Brazil

 * Oeiras, Piauí, a municipality in the State of Piauí
 * Oeiras do Pará, Pará, a municipality in the State of Pará

Portugal

 * Oeiras, Portugal, a municipality in the district of Lisbon
 * Oeiras e São Julião da Barra, a former civil parish in the municipality of Oeiras
 * Oeiras e São Julião da Barra, Paço de Arcos e Caxias, successor of the above