Yates City, IL has a population of 722 and is the 17,272nd largest city in the United States. The population density is 1,467 per sq mi which is 560% higher than the Illinois average and 1519% higher than the national average. The median age in Yates City is 39 which is approximately 3% higher than the Illinois average of 37. In Yates City, 69% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 83% of Yates City residents were born in Illinois, 16% were born out of state, 1% were born outside of the United States and 0% were foreign born.