Sumner, IL has a population of 5,094 and is the 6,381st largest city in the United States. The population density is 3,712 per sq mi which is 1570% higher than the Illinois average and 3997% higher than the national average. The median age in Sumner is 34 which is approximately 9% lower than the Illinois average of 37. In Sumner, 22% of the population over 15 years of age are married, 85% speak English and 13% speak Spanish. 75% of Sumner residents were born in Illinois, 19% were born out of state, 1% were born outside of the United States and 5% were foreign born.