Pawnee, IL has a population of 2,738 and is the 9,274th largest city in the United States. The population density is 2,172 per sq mi which is 877% higher than the Illinois average and 2297% higher than the national average. The median age in Pawnee is 38 which is approximately 2% higher than the Illinois average of 37. In Pawnee, 67% of the population over 15 years of age are married, 97% speak English and 2% speak Spanish. 89% of Pawnee residents were born in Illinois, 11% were born out of state, 0% were born outside of the United States and 0% were foreign born.