San Pedro Mártir Yucuxaco is a town and municipality located in the state of Oaxaca in southwestern Mexico. It is situated within the Tlaxiaco District, which lies in the southern portion of the Mixteca Region.
The municipality serves as a local administrative division within the region. While it occupies a specific area within the Mixteca territory, its primary geographical identification is tied to its placement in the south of Oaxaca.