Lacona, IA has a population of 472 and is the 19,890th largest city in the United States. The population density is 1,429 per sq mi which is 2516% higher than the Iowa average and 1477% higher than the national average. The median age in Lacona is 37 which is approximately 4% lower than the Iowa average of 38. In Lacona, 57% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 90% of Lacona residents were born in Iowa, 10% were born out of state, 0% were born outside of the United States and 0% were foreign born.