Danforth, IL has a population of 602 and is the 18,411th largest city in the United States. The population density is 1,290 per sq mi which is 480% higher than the Illinois average and 1324% higher than the national average. The median age in Danforth is 42 which is approximately 12% higher than the Illinois average of 37. In Danforth, 72% of the population over 15 years of age are married, 96% speak English and 3% speak Spanish. 82% of Danforth residents were born in Illinois, 15% were born out of state, 0% were born outside of the United States and 3% were foreign born.