Riverside is a city in Platte County, Missouri and is part of the Kansas City metropolitan area within the United States. The population was 2,937 at the 2010 census.
Riverside lies on the edge of the Missouri River and was formally incorporated in 1951.
For many years, the town was known for its Riverside Race Track. The Riverside Park Jockey Club operated from 1928 to 1937 and was popularly called “Pendergast Track” after its patron, big city boss Tom Pendergast (although Pendergast was not officially on its organization papers). The horse racing track was on the site of a former dog racing track. The track operated under a questionable legal basis. The site was supplanted by an automobile race track, which closed in the 1990s.
A legal gambling establishment on the river now is the $106 million casino run by Argosy Gaming Company.
One of the landmarks in Riverside is the Riverside Red X store. It was founded as a gas station in 1948 by Edward Young.