Mitchell, IL has a population of 1,183 and is the 14,123rd largest city in the United States. The population density is 2,011 per sq mi which is 805% higher than the Illinois average and 2120% higher than the national average. The median age in Mitchell is 47 which is approximately 26% higher than the Illinois average of 37. In Mitchell, 51% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 61% of Mitchell residents were born in Illinois, 39% were born out of state, 0% were born outside of the United States and 1% were foreign born.