Pearl City, IL has a population of 875 and is the 15,988th largest city in the United States. The population density is 1,369 per sq mi which is 516% higher than the Illinois average and 1412% higher than the national average. The median age in Pearl City is 38 which is approximately 2% higher than the Illinois average of 37. In Pearl City, 67% of the population over 15 years of age are married, 94% speak English and 5% speak Spanish. 76% of Pearl City residents were born in Illinois, 20% were born out of state, 0% were born outside of the United States and 4% were foreign born.