Luxemburg, IA has a population of 203 and is the 24,379th largest city in the United States. The population density is 430 per sq mi which is 686% higher than the Iowa average and 374% higher than the national average. The median age in Luxemburg is 55 which is approximately 45% higher than the Iowa average of 38. In Luxemburg, 84% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 91% of Luxemburg residents were born in Iowa, 9% were born out of state, 0% were born outside of the United States and 0% were foreign born.