Bancroft, IA has a population of 712 and is the 17,367th largest city in the United States. The population density is 1,279 per sq mi which is 2241% higher than the Iowa average and 1312% higher than the national average. The median age in Bancroft is 40 which is approximately 4% higher than the Iowa average of 38. In Bancroft, 67% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 75% of Bancroft residents were born in Iowa, 24% were born out of state, 0% were born outside of the United States and 2% were foreign born.