Creston, IA has a population of 7,877 and is the 4,752nd largest city in the United States. The population density is 1,518 per sq mi which is 2679% higher than the Iowa average and 1576% higher than the national average. The median age in Creston is 39 which is approximately 2% higher than the Iowa average of 38. In Creston, 56% of the population over 15 years of age are married, 95% speak English and 2% speak Spanish. 74% of Creston residents were born in Iowa, 22% were born out of state, 1% were born outside of the United States and 3% were foreign born.