Blue Mound, IL has a population of 1,087 and is the 14,624th largest city in the United States. The population density is 1,838 per sq mi which is 727% higher than the Illinois average and 1928% higher than the national average. The median age in Blue Mound is 38 which is approximately 2% higher than the Illinois average of 37. In Blue Mound, 64% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 90% of Blue Mound residents were born in Illinois, 10% were born out of state, 0% were born outside of the United States and 0% were foreign born.