Earth City is an unincorporated community located in St. Louis County. It is bounded by the city of Bridgeton on the east and north, the city of Maryland Heights to the south, and the Missouri River to the west. The town is notable as being home to the headquarters of the Save-A-Lot and a major UPS shipping hub. It is a major business park bounded by I-70 on the south, I-270 on the east, and MO 370 to the north.
Earth City is home to Rams Park (now the Russell Athletic Training Center named after sportswear manufacturer Russell Athletic), the St. Louis Rams' training facility and offices.