Riverside is a city in rural Washington County, Iowa, United States, along the English River on Iowa Highway 22. It is part of the Iowa City, Iowa Metropolitan Statistical Area. The population was 993 at the 2010 census. It is part of the Highland Community School District.
Riverside proclaimed itself the future birthplace of Captain James T. Kirk, a fictional character from the television series Star Trek, with the agreement of series creator Gene Roddenberry.