Keosauqua, IA has a population of 1,029 and is the 14,965th largest city in the United States. The population density is 711 per sq mi which is 1202% higher than the Iowa average and 685% higher than the national average. The median age in Keosauqua is 53 which is approximately 38% higher than the Iowa average of 38. In Keosauqua, 68% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 83% of Keosauqua residents were born in Iowa, 16% were born out of state, 0% were born outside of the United States and 1% were foreign born.