Coulterville, IL has a population of 934 and is the 15,566th largest city in the United States. The population density is 1,668 per sq mi which is 650% higher than the Illinois average and 1741% higher than the national average. The median age in Coulterville is 42 which is approximately 12% higher than the Illinois average of 37. In Coulterville, 60% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 79% of Coulterville residents were born in Illinois, 19% were born out of state, 0% were born outside of the United States and 1% were foreign born.