Leaf River, IL has a population of 637 and is the 18,058th largest city in the United States. The population density is 764 per sq mi which is 244% higher than the Illinois average and 744% higher than the national average. The median age in Leaf River is 37 which is approximately 2% lower than the Illinois average of 37. In Leaf River, 55% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 89% of Leaf River residents were born in Illinois, 10% were born out of state, 0% were born outside of the United States and 1% were foreign born.
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The population density in Leaf River is 244% higher than Illinois.
The median age in Leaf River is 2% lower than Illinois.
In Leaf River 90.27% of the population is White.
In Leaf River 0.31% of the population is Black or African American.