Le Claire, IA has a population of 3,931 and is the 7,519th largest city in the United States. The population density is 842 per sq mi which is 1441% higher than the Iowa average and 829% higher than the national average. The median age in Le Claire is 40 which is approximately 6% higher than the Iowa average of 38. In Le Claire, 68% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 58% of Le Claire residents were born in Iowa, 42% were born out of state, 0% were born outside of the United States and 0% were foreign born.