Sadorus, IL has a population of 375 and is the 21,233rd largest city in the United States. The population density is 365 per sq mi which is 64% higher than the Illinois average and 303% higher than the national average. The median age in Sadorus is 45 which is approximately 20% higher than the Illinois average of 37. In Sadorus, 55% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 85% of Sadorus residents were born in Illinois, 11% were born out of state, 3% were born outside of the United States and 1% were foreign born.