Dow City, IA has a population of 463 and is the 20,006th largest city in the United States. The population density is 1,449 per sq mi which is 2553% higher than the Iowa average and 1500% higher than the national average. The median age in Dow City is 38 which is approximately 1% lower than the Iowa average of 38. In Dow City, 55% of the population over 15 years of age are married, 96% speak English and 4% speak Spanish. 76% of Dow City residents were born in Iowa, 20% were born out of state, 1% were born outside of the United States and 3% were foreign born.