Emerson, IA has a population of 525 and is the 19,242nd largest city in the United States. The population density is 2,050 per sq mi which is 3652% higher than the Iowa average and 2162% higher than the national average. The median age in Emerson is 30 which is approximately 21% lower than the Iowa average of 38. In Emerson, 67% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 65% of Emerson residents were born in Iowa, 33% were born out of state, 0% were born outside of the United States and 2% were foreign born.