Casas Grandes is an archaeological site approximately 200 miles (320 km) south of US Gila Cliff Dwellings National Monument ruins and was built by the Mogollon people. It is the contemporary name given to a pre-Columbian archaeological zone and its central site, located in the modern-day Mexican state of Chihuahua.
It is one of the largest and most complex Mogollon culture sites in the region. Settlement began after 1130 CE, and would see the larger buildings developed into multi-storied dwellings after 1350 CE. The community was abandoned approximately 1450 CE. Cases Grandes is regarded as one of the most significant Mogollon archaeological zones in the northwestern Mexico region, linking it to other sites in Arizona and New Mexico in the United States, and exhibiting the expanse of the Mogollon sphere of influence.
Casas Grandes complex is located in a wide, fertile valley on the Casas Grandes or San Miguel River, 35 miles (56 km) south of Janos and 150 miles (240 km) northwest of the state capital, the city of Chihuahua. The settlement relied on irrigation to support its agriculture. Casas Grandes has been designated a UNESCO World Heritage Site and is under the purview of INAH.
The archaeological zone is contained within the eponymous modern municipio (municipality) of Casas Grandes. The valley and region have been inhabited by indigenous groups for thousands of years.