| San Agustín Atenango | |
| Settlement Type: | Municipality and town |
| Pushpin Map: | Mexico |
| Pushpin Label Position: | above |
| Pushpin Map Caption: | Location in Mexico |
| Subdivision Type: | Country |
| Subdivision Name: |  Mexico |
| Subdivision Type1: | State |
| Subdivision Name1: | Oaxaca |
| Area Total Km2: | 82.93 |
| Population As Of: | 2005 |
| Population Total: | 1787 |
| Timezone: | Central Standard Time |
| Utc Offset: | -6 |
| Timezone Dst: | Central Daylight Time |
| Utc Offset Dst: | -5 |
| Coordinates: | 17.6111°N -98.0139°W |
San Agustín Atenango is a town and municipality in Oaxaca in south-western Mexico. The municipality covers an area of 82.93 km2. It is part of the Silacayoapam District in the Mixteca Region.
As of 2020, the municipality had a total population of 1,871. Out of the town's population, 963 are female (51.5%), and 908 are male (48.5%). 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.[1] In the town, 1,586 people are indigenous, and 21 people are Afro-Mexican.[2]