Sesser, IL has a population of 1,861 and is the 11,451st largest city in the United States. The population density is 1,834 per sq mi which is 725% higher than the Illinois average and 1924% higher than the national average. The median age in Sesser is 37 which is approximately 1% lower than the Illinois average of 37. In Sesser, 53% of the population over 15 years of age are married, 96% speak English and 4% speak Spanish. 82% of Sesser residents were born in Illinois, 16% were born out of state, 1% were born outside of the United States and 1% were foreign born.