Olleros de Tera is a locality in
Calzadilla de Tera,
Zamora province
A province is almost always an administrative division within a country or state. The term derives from the ancient Roman '' provincia'', which was the major territorial and administrative unit of the Roman Empire's territorial possessions ou ...
,
Castile and León, Spain.
it had a population of 179.
References
Populated places in the Province of Zamora
Localities of Spain
{{Zamora-geo-stub