Story City, IA has a population of 3,423 and is the 8,158th largest city in the United States. The population density is 1,249 per sq mi which is 2186% higher than the Iowa average and 1279% higher than the national average. The median age in Story City is 47 which is approximately 22% higher than the Iowa average of 38. In Story City, 67% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 68% of Story City residents were born in Iowa, 28% were born out of state, 1% were born outside of the United States and 2% were foreign born.