Casa Grande Ruins National Monument
| Casa Grande Ruins National Monument | |
|---|---|
The southern facade of the "Big House" | |
| Location | Pinal County, Arizona, USA |
| Nearest city | Coolidge |
| Coordinates | 32°59′49″N 111°31′55″W / 32.9970051°N 111.5320692°W |
| Area | 472.5 acres (191.2 ha) |
| Created | August 3, 1918 |
| Visitors | 62,995 (in 2018) |
| Governing body | National Park Service |
| Website | Casa Grande Ruins National Monument |
| NRHP reference No. | 66000192 |
| Added to NRHP | October 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.