Crossville, IL has a population of 801 and is the 16,603rd largest city in the United States. The population density is 1,250 per sq mi which is 462% higher than the Illinois average and 1280% higher than the national average. The median age in Crossville is 38 which is approximately 2% higher than the Illinois average of 37. In Crossville, 54% of the population over 15 years of age are married, 98% speak English and 2% speak Spanish. 54% of Crossville residents were born in Illinois, 44% were born out of state, 1% were born outside of the United States and 0% were foreign born.