Oña is a municipality and town located in the province of Burgos, Castile and León, Spain. According to the 2011 census (INE), the municipality has a population of 1,219 inhabitants.

Main sights Benedictine monastery of San Salvador de Oña (11th century). During 2012, the town hosted the 17th edition of the sacred art exhibition Las Edades del Hombre.Monacatus Las Edades del hombre 17th edition, 2012 El jardín secreto, an outdoor walk and art exhibit by local artists.

People from Oña Andrés de Olmos (1485 – 8 October 1571) – Catholic church priest and grammarian and ethno-historian of Mexico's Indians Martina Ibaibarriaga (1788–1849) – soldier

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