Bankston, IA has a population of 28 and is the 28,636th largest city in the United States. The population density is 103 per sq mi which is 88% higher than the Iowa average and 13% higher than the national average. The median age in Bankston is 53 which is approximately 39% higher than the Iowa average of 38. In Bankston, 88% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 96% of Bankston residents were born in Iowa, 4% were born out of state, 0% were born outside of the United States and 0% were foreign born.