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 sightsBenedictine monastery of San Salvador de Oña (11th century). During the year 2012, the town hosted the 17th edition of the sacred art exhibition Las Edades del Hombre.People from OñaAndrés de Olmos (1485 – 8 October 1571) - Catholic church priest and extraordinary grammarian and ethno-historian of Mexico's IndiansMartina Ibaibarriaga (1788 – 1849) - soldier