Ione ( ; formerly, Bed Bug, Bedbug, Freeze Out, Hardscrabble, Ione City, Woosterville, Jone City, Jone Valley, and Rickeyville) is a city in Amador County, California, United States. The population was 7,918 at the 2010 census, up from 7,129 at the 2000 census. Once known as "Bed-Bug" and "Freeze Out," Ione was an important supply center on the main road to the Mother Lode and Southern Mines during the California Gold Rush.