Mark, IL has a population of 530 and is the 19,193rd largest city in the United States. The population density is 470 per sq mi which is 111% higher than the Illinois average and 418% higher than the national average. The median age in Mark is 47 which is approximately 26% higher than the Illinois average of 37. In Mark, 64% of the population over 15 years of age are married, 90% speak English and 10% speak Spanish. 86% of Mark 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 Mark is 111% higher than Illinois.
The median age in Mark is 26% higher than Illinois.
In Mark 100.00% of the population is White.
In Mark 0.00% of the population is Black or African American.