San Lucas Quiaviní is a town and municipality in Oaxaca in south-western Mexico. The municipality covers an area of 58.69 km². It is part of th…San Lucas Quiaviní is a town and municipality in Oaxaca in south-western Mexico. The municipality covers an area of 58.69 km². It is part of the Tlacolula District in the east of the Valles Centrales Region.