Old Mill Creek, IL has a population of 180 and is the 24,922nd largest city in the United States. The population density is 17 per sq mi which is 92% lower than the Illinois average and 81% lower than the national average. The median age in Old Mill Creek is 45 which is approximately 20% higher than the Illinois average of 37. In Old Mill Creek, 65% of the population over 15 years of age are married, 83% speak English and 3% speak Spanish. 63% of Old Mill Creek residents were born in Illinois, 18% were born out of state, 3% were born outside of the United States and 16% were foreign born.
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The population density in Old Mill Creek is 92% lower than Illinois.
The median age in Old Mill Creek is 20% higher than Illinois.
In Old Mill Creek 81.11% of the population is White.
In Old Mill Creek 0.00% of the population is Black or African American.
In Old Mill Creek 17.22% of the population is Asian.