Shannon City, IA has a population of 54 and is the 28,079th largest city in the United States. The population density is 131 per sq mi which is 140% higher than the Iowa average and 45% higher than the national average. The median age in Shannon City is 47 which is approximately 23% higher than the Iowa average of 38. In Shannon City, 61% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 81% of Shannon City residents were born in Iowa, 19% were born out of state, 0% were born outside of the United States and 0% were foreign born.