Lyndon, IL has a population of 690 and is the 17,575th largest city in the United States. The population density is 887 per sq mi which is 299% higher than the Illinois average and 879% higher than the national average. The median age in Lyndon is 42 which is approximately 12% higher than the Illinois average of 37. In Lyndon, 61% of the population over 15 years of age are married, 97% speak English and 2% speak Spanish. 84% of Lyndon residents were born in Illinois, 14% 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 Lyndon is 299% higher than Illinois.
The median age in Lyndon is 12% higher than Illinois.
In Lyndon 92.90% of the population is White.
In Lyndon 3.77% of the population is Black or African American.