Ackley, IA has a population of 1,738 and is the 11,852nd largest city in the United States. The population density is 709 per sq mi which is 1199% higher than the Iowa average and 683% higher than the national average. The median age in Ackley is 49 which is approximately 30% higher than the Iowa average of 38. In Ackley, 73% of the population over 15 years of age are married, 94% speak English and 4% speak Spanish. 84% of Ackley residents were born in Iowa, 12% were born out of state, 1% were born outside of the United States and 3% were foreign born.