Danville, IL has a population of 32,030 and is the 1,330th largest city in the United States. The population density is 1,781 per sq mi which is 701% higher than the Illinois average and 1866% higher than the national average. The median age in Danville is 37 which is approximately 2% lower than the Illinois average of 37. In Danville, 46% of the population over 15 years of age are married, 93% speak English and 4% speak Spanish. 78% of Danville residents were born in Illinois, 18% were born out of state, 0% were born outside of the United States and 4% were foreign born.