State Center, IA has a population of 1,337 and is the 13,375th largest city in the United States. The population density is 1,357 per sq mi which is 2383% higher than the Iowa average and 1397% higher than the national average. The median age in State Center is 43 which is approximately 13% higher than the Iowa average of 38. In State Center, 68% of the population over 15 years of age are married, 96% speak English and 3% speak Spanish. 78% of State Center residents were born in Iowa, 19% were born out of state, 0% were born outside of the United States and 2% were foreign born.