Ione, CA has a population of 7,056 and is the 5,147th largest city in the United States. The population density is 1,540 per sq mi which is 563% higher than the California average and 1600% higher than the national average. The median age in Ione is 44 which is approximately 22% higher than the California average of 36. In Ione, 41% of the population over 15 years of age are married, 75% speak English and 18% speak Spanish. 66% of Ione residents were born in California, 24% were born out of state, 1% were born outside of the United States and 9% were foreign born.