Mill Creek, IL has a population of 41 and is the 28,369th largest city in the United States. The population density is 109 per sq mi which is 51% lower than the Illinois average and 20% higher than the national average. The median age in Mill Creek is 52 which is approximately 40% higher than the Illinois average of 37. In Mill Creek, 61% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 39% of Mill Creek residents were born in Illinois, 61% were born out of state, 0% were born outside of the United States and 0% were foreign born.
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The population density in Mill Creek is 51% lower than Illinois.
The median age in Mill Creek is 40% higher than Illinois.
In Mill Creek 100.00% of the population is White.
In Mill Creek 0.00% of the population is Black or African American.