Lenzburg, IL has a population of 586 and is the 18,576th largest city in the United States. The population density is 507 per sq mi which is 128% higher than the Illinois average and 460% higher than the national average. The median age in Lenzburg is 36 which is approximately 5% lower than the Illinois average of 37. In Lenzburg, 50% of the population over 15 years of age are married, 98% speak English and 2% speak Spanish. 65% of Lenzburg residents were born in Illinois, 30% were born out of state, 1% were born outside of the United States and 4% were foreign born.
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The population density in Lenzburg is 128% higher than Illinois.
The median age in Lenzburg is 5% lower than Illinois.
In Lenzburg 85.15% of the population is White.
In Lenzburg 0.17% of the population is Black or African American.