Rockwell, IA has a population of 1,100 and is the 14,551st largest city in the United States. The population density is 369 per sq mi which is 575% higher than the Iowa average and 307% higher than the national average. The median age in Rockwell is 42 which is approximately 11% higher than the Iowa average of 38. In Rockwell, 67% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 83% of Rockwell residents were born in Iowa, 16% were born out of state, 0% were born outside of the United States and 1% were foreign born.