Sloan, IA has a population of 1,192 and is the 14,066th largest city in the United States. The population density is 1,916 per sq mi which is 3407% higher than the Iowa average and 2014% higher than the national average. The median age in Sloan is 41 which is approximately 8% higher than the Iowa average of 38. In Sloan, 67% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 73% of Sloan residents were born in Iowa, 26% were born out of state, 0% were born outside of the United States and 0% were foreign born.