Asunción Ocotlán is a town and municipality in Oaxaca in south-western Mexico. The municipality covers an area of 12.76 km². It is part of the Ocotlán District in the south of the Valles Centrales Region. Its name "Asunción" alludes the assumption of Mary and Ocotlán means between ocotes -Oco (ocote) and tlan (between) in Nahuatl. It borders at north and west with Ocotlán de Morelos, south with San Pedro Apóstol and east with San Pedro Mártir. Almost all the lands are plains and its water sources come from the Mijangos and Atoyac rivers. Its economy is based in agriculture in spite of its semi-desert climate. The largest part of population isCatholic. Its main celebration is The Assumption of Virgin Mary on August 15, moreover they celebrate with a fair, dances and calendas (celebrations of the patron saints of the oaxacans churches.