Philo, IL has a population of 1,627 and is the 12,236th largest city in the United States. The population density is 1,963 per sq mi which is 783% higher than the Illinois average and 2066% higher than the national average. The median age in Philo is 39 which is approximately 4% higher than the Illinois average of 37. In Philo, 70% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 83% of Philo residents were born in Illinois, 16% were born out of state, 0% were born outside of the United States and 0% were foreign born.