Oleiros (Portuguese pronunciation: [oˈlɐjɾuʃ]) is a municipality in the district of Castelo Branco in Portugal with a total area of 471.1 km² and a total population of 6,212. The present mayor is José Santos Marques, elected by the Social Democratic Party. The municipal holiday is the Monday after the 2nd Sunday of August.
Built in 2006, a wind farm (Pinhal Interior Wind Farm) operates in Oleiros, comprising a 54 MW power generation capacity.
Administratively, the municipality is divided into 10 civil parishes (freguesias):
- Amieira - Oleiros
- Estreito - Vilar Barroco
- Sarnadas de São Simão
Coordinates: 39°55′07″N 7°54′46″W / 39.9186°N 7.91278°W