Leon, IA has a population of 1,995 and is the 11,042nd largest city in the United States. The population density is 629 per sq mi which is 1051% higher than the Iowa average and 594% higher than the national average. The median age in Leon is 38 which is approximately 1% lower than the Iowa average of 38. In Leon, 66% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 78% of Leon residents were born in Iowa, 21% were born out of state, 0% were born outside of the United States and 1% were foreign born.