San Juan del Río is a town and municipality in Oaxaca in southern Mexico.

It is part of the Tlacolula District in the east of the Valles Centrales Region.

It is located in the Central Valleys region of Oaxaca, in the state's center.

San Juan del Río is at 1,128 meters of altitude.

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