Shenandoah, IA has a population of 5,030 and is the 6,449th largest city in the United States. The population density is 1,343 per sq mi which is 2357% higher than the Iowa average and 1382% higher than the national average. The median age in Shenandoah is 44 which is approximately 15% higher than the Iowa average of 38. In Shenandoah, 66% of the population over 15 years of age are married, 94% speak English and 5% speak Spanish. 57% of Shenandoah residents were born in Iowa, 38% were born out of state, 0% were born outside of the United States and 5% were foreign born.