Iona, ID has a population of 2,266 and is the 10,346th largest city in the United States. The population density is 2,192 per sq mi which is 11388% higher than the Idaho average and 2319% higher than the national average. The median age in Iona is 30 which is approximately 17% lower than the Idaho average of 36. In Iona, 70% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 72% of Iona residents were born in Idaho, 26% were born out of state, 1% were born outside of the United States and 1% were foreign born.