Audubon, IA has a population of 2,043 and is the 10,894th largest city in the United States. The population density is 1,069 per sq mi which is 1857% higher than the Iowa average and 1080% higher than the national average. The median age in Audubon is 48 which is approximately 27% higher than the Iowa average of 38. In Audubon, 71% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 80% of Audubon residents were born in Iowa, 20% were born out of state, 0% were born outside of the United States and 0% were foreign born.