El Oro Municipality, Durango
El Oro is a municipality in the Mexican state of Durango. The municipal seat lies at Santa María del Oro. The municipality covers an area of 10,041 km2.
As of 2010, the municipality had a total population of 11,320, up from 10,501 as of 2005.
The municipality had 113 localities, the largest of which was Santa María del Oro, classified as urban.