Stewardson, IL has a population of 719 and is the 17,298th largest city in the United States. The population density is 1,201 per sq mi which is 440% higher than the Illinois average and 1226% higher than the national average. The median age in Stewardson is 40 which is approximately 8% higher than the Illinois average of 37. In Stewardson, 52% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 91% of Stewardson residents were born in Illinois, 7% were born out of state, 2% were born outside of the United States and 0% were foreign born.