Charlotte, IA has a population of 404 and is the 20,830th largest city in the United States. The population density is 702 per sq mi which is 1186% higher than the Iowa average and 675% higher than the national average. The median age in Charlotte is 32 which is approximately 15% lower than the Iowa average of 38. In Charlotte, 57% of the population over 15 years of age are married, 96% speak English and 2% speak Spanish. 81% of Charlotte residents were born in Iowa, 17% were born out of state, 0% were born outside of the United States and 2% were foreign born.