Worthville is a home rule-class city in Carroll County, Kentucky, United States. The population was 185 at the 2010 census. A post office wa…Worthville is a home rule-class city in Carroll County, Kentucky, United States. The population was 185 at the 2010 census. A post office was established at Worthville in 1847. The community was named for William J. Worth, an American general.