Ciudad Acuna is located in Saltillo city, Mexico at the 29.3232, -100.9522 coordinates. Distance from Ciudad Acuna to other cities. are listed below, click on the city name to find distance between. Distance from Ciudad Acuña to Torreon 486 km, to Monclova 273 km, to Piedras Negras 81 km. The green marker indicates the location of Ciudad Acuña.