Allerton, IL has a population of 288 and is the 22,699th largest city in the United States. The population density is 424 per sq mi which is 91% higher than the Illinois average and 368% higher than the national average. The median age in Allerton is 43 which is approximately 14% higher than the Illinois average of 37. In Allerton, 65% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 86% of Allerton residents were born in Illinois, 11% were born out of state, 2% were born outside of the United States and 0% were foreign born.
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The population density in Allerton is 91% higher than Illinois.
The median age in Allerton is 14% higher than Illinois.
In Allerton 97.92% of the population is White.
In Allerton 1.39% of the population is Black or African American.