Independence, IA has a population of 6,005 and is the 5,755th largest city in the United States. The population density is 988 per sq mi which is 1709% higher than the Iowa average and 991% higher than the national average. The median age in Independence is 40 which is approximately 6% higher than the Iowa average of 38. In Independence, 61% of the population over 15 years of age are married, 96% speak English and 3% speak Spanish. 82% of Independence residents were born in Iowa, 15% were born out of state, 0% were born outside of the United States and 3% were foreign born.