Monona, IA has a population of 1,495 and is the 12,706th largest city in the United States. The population density is 1,281 per sq mi which is 2246% higher than the Iowa average and 1314% higher than the national average. The median age in Monona is 47 which is approximately 25% higher than the Iowa average of 38. In Monona, 72% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 66% of Monona residents were born in Iowa, 33% were born out of state, 0% were born outside of the United States and 1% were foreign born.