Andrew, IA has a population of 519 and is the 19,304th largest city in the United States. The population density is 1,947 per sq mi which is 3464% higher than the Iowa average and 2049% higher than the national average. The median age in Andrew is 30 which is approximately 20% lower than the Iowa average of 38. In Andrew, 58% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 86% of Andrew residents were born in Iowa, 14% were born out of state, 0% were born outside of the United States and 0% were foreign born.