Jacksonville, IL has a population of 19,042 and is the 2,286th largest city in the United States. The population density is 1,820 per sq mi which is 719% higher than the Illinois average and 1909% higher than the national average. The median age in Jacksonville is 38 which is approximately 1% higher than the Illinois average of 37. In Jacksonville, 46% of the population over 15 years of age are married, 96% speak English and 2% speak Spanish. 79% of Jacksonville residents were born in Illinois, 17% 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 Jacksonville is 719% higher than Illinois.
The median age in Jacksonville is 1% higher than Illinois.
In Jacksonville 85.30% of the population is White.
In Jacksonville 10.71% of the population is Black or African American.