Coralville is a city in Johnson County, Iowa, United States. It is a suburb of Iowa City and part of the Iowa City Metropolitan Statistical Area. The population was 18,907 at the 2010 census.
Coralville is the location of the Edgewater Park Site, a 3,800-year-old archaeological site along the Iowa River. Edgewater is the oldest site in Iowa with evidence of domesticated plant use.
Coralville incorporated as a city on June 1, 1857. The city's name is derived from the fossils that are found in the limestone along the Iowa River. In 1864, Louis Agassiz, a Harvard University zoologist, gave a lecture at the nearby University of Iowa titled “The Coral Reefs of Iowa City”. During the lecture, he presented local samples of fossilized Devonian period coral. The lecture was well received and helped raise public interest in the local fossils.