Iola, KS has a population of 5,560 and is the 6,039th largest city in the United States. The population density is 1,243 per sq mi which is 3443% higher than the Kansas average and 1272% higher than the national average. The median age in Iola is 36 which is approximately equal to the Kansas average of 36. In Iola, 51% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 72% of Iola residents were born in Kansas, 26% were born out of state, 2% were born outside of the United States and 0% were foreign born.