Andover, IL has a population of 583 and is the 18,615th largest city in the United States. The population density is 587 per sq mi which is 164% higher than the Illinois average and 548% higher than the national average. The median age in Andover is 40 which is approximately 7% higher than the Illinois average of 37. In Andover, 68% of the population over 15 years of age are married, 96% speak English and 4% speak Spanish. 86% of Andover residents were born in Illinois, 11% were born out of state, 0% were born outside of the United States and 3% were foreign born.
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The population density in Andover is 164% higher than Illinois.
The median age in Andover is 7% higher than Illinois.
In Andover 98.97% of the population is White.
In Andover 0.00% of the population is Black or African American.