Carmi, IL has a population of 5,065 and is the 6,413th largest city in the United States. The population density is 2,023 per sq mi which is 810% higher than the Illinois average and 2133% higher than the national average. The median age in Carmi is 44 which is approximately 18% higher than the Illinois average of 37. In Carmi, 67% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 63% of Carmi residents were born in Illinois, 36% were born out of state, 1% were born outside of the United States and 1% were foreign born.