Ravenna is a home rule-class city in Estill County, Kentucky, United States. The population was 605 at the 2010 census. The US Federal …Ravenna is a home rule-class city in Estill County, Kentucky, United States. The population was 605 at the 2010 census. The US Federal Census dated 7 Aug,1820 reflects a town located in Estill Co., KY as "Ravenna", but before it was incorporated, Ravenna was known only as "The Village".