Ione 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.
Ione is located at 38°21?10?N 120°55?58?W / 38.35278°N 120.93278°W / 38.35278; -120.93278.
According to the United States Census Bureau, the city has a total area of 4.8 square miles (12.4 km²), 4.8 square miles (12.3 km²) of it is land and 0.015 square miles (0.04 km²) of it (0.31%) is water.