Santa Lucía Miahuatlán is a town and municipality in Oaxaca in south-western Mexico.

The municipality covers an area of 109.72 km2.

It is part of the Miahuatlán District in the south of the Sierra Sur Region.

As of 2005, the municipality had a total population of 4,508.

This article about a location in the Mexican state of Oaxaca is a stub.