Knoxville is a city located in the state of Iowa, United States. It serves as the county seat for Marion County.
The city's population was recorded at 7,595 during the 2020 census, reflecting an increase from the 7,313 residents reported in 2010. Geographically, Knoxville is situated approximately four miles south of Lake Red Rock and Elk Rock State Park.
The city is notable for hosting the National Sprint Car Hall of Fame & Museum. This institution is located adjacent to the Knoxville Raceway dirt track.