Ciudad Lerdo (Lerdo City) is a small city in the northeastern portion of the Mexican state of Durango. It serves as the municipal seat for the surrounding municipality of the same name. It is located at co-ordinates 25.33° N, 103.31° W, bordering southeastern Coahuila. As of 2010, the city of Lerdo had a population of 79,669, up from 71,373 peop...