Arcola, IL has a population of 2,881 and is the 9,011th largest city in the United States. The population density is 1,443 per sq mi which is 549% higher than the Illinois average and 1493% higher than the national average. The median age in Arcola is 35 which is approximately 6% lower than the Illinois average of 37. In Arcola, 57% of the population over 15 years of age are married, 71% speak English and 28% speak Spanish. 70% of Arcola residents were born in Illinois, 14% were born out of state, 1% were born outside of the United States and 15% were foreign born.