Casa Grande Ruins National Monument

Casa Grande Ruins National Monument
The southern facade of the "Big House"
Interactive map of Casa Grande Ruins National Monument
LocationPinal County, Arizona, USA
Nearest cityCoolidge
Coordinates32°59′49″N 111°31′55″W / 32.9970051°N 111.5320692°W / 32.9970051; -111.5320692
Area472.5 acres (191.2 ha)
CreatedAugust 3, 1918 (1918-08-03)
Visitors62,995 (in 2018)
Governing bodyNational Park Service
WebsiteCasa Grande Ruins National Monument
Casa Grande Ruins National Monument
NRHP reference No.66000192
Added to NRHPOctober 15, 1966

Casa Grande Ruins National Monument (O'odham: Siwañ Waʼa Ki: or Sivan Vahki) is a United States national monument preserving a group of Classic Period (1150–1450 CE) Hohokam structures in Coolidge, Arizona, northeast of Casa Grande.