San Agustín Atenango is a town and municipality in Oaxaca in south-western Mexico.

It is part of the Silacayoapam District in the Mixteca Region.

The primary indigenous language spoken in San Agustín Atenango is Mixteco, with 892 people (47.9%) speaking the language.

934 people in the town (49.9%) live in moderate poverty, while 404 people (21.6%) live in extreme poverty.

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