In 2010, the Riverfront Times named River City Casino the Best St. Built for an initial $380 million, the project's second phase requires an additional $75 million investment within the first three years for construction of a hotel. The property's decor uses a 1904 World’s Fair theme. Located in Lemay, Missouri, River City Casino is on the western bank of the Mississippi River. It is owned by Gaming and Leisure Properties and operated by Penn Entertainment. River City Casino is a casino in Lemay, Missouri, in Greater St. For the casino in New Orleans, see River City Casino (New Orleans).