Holstein, IA has a population of 1,416 and is the 13,033rd largest city in the United States. The population density is 899 per sq mi which is 1545% higher than the Iowa average and 892% higher than the national average. The median age in Holstein is 42 which is approximately 11% higher than the Iowa average of 38. In Holstein, 66% of the population over 15 years of age are married, 98% speak English and 2% speak Spanish. 79% of Holstein residents were born in Iowa, 19% were born out of state, 0% were born outside of the United States and 2% were foreign born.