Guttenberg, IA has a population of 1,956 and is the 11,154th largest city in the United States. The population density is 936 per sq mi which is 1612% higher than the Iowa average and 933% higher than the national average. The median age in Guttenberg is 53 which is approximately 40% higher than the Iowa average of 38. In Guttenberg, 64% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 80% of Guttenberg residents were born in Iowa, 19% were born out of state, 1% were born outside of the United States and 1% were foreign born.