Atalissa, IA has a population of 339 and is the 21,791st largest city in the United States. The population density is 2,436 per sq mi which is 4359% higher than the Iowa average and 2589% higher than the national average. The median age in Atalissa is 41 which is approximately 8% higher than the Iowa average of 38. In Atalissa, 65% of the population over 15 years of age are married, 95% speak English and 4% speak Spanish. 84% of Atalissa residents were born in Iowa, 15% were born out of state, 0% were born outside of the United States and 1% were foreign born.