Santa Lucía Ocotlán is a town and municipality located in the state of Oaxaca in south-western Mexico. It is situated within the Ocotlán District, which lies in the southern portion of the Valles Centrales Region.
The municipality serves as a local administrative division within this region of Oaxaca. While it occupies a specific area within the district, it remains a recognized constituent part of the state's geographic and political landscape.