Population of Lake Forest, Illinois as of March 2025. How many people live in Lake Forest today?

The exact population of Lake Forest, Illinois as of March 2025 is estimated at 19,367 residents. Please note: this figure is an estimate and may slightly change as people get born and pass away, it also depends on migration to/from Lake Forest.

Check out more data on population in Illinois:

• Population of Rockford
• Population of Cicero
• Population of Skokie
• Population of Berwyn
• Population of Wheaton
• Population of Downers Grove
• Population of Buffalo Grove
• Population of Romeoville
• Population of Urbana
• Population of Rock Island
• Population of Woodridge
• Population of Mundelein
• Population of Algonquin
• Population of Glen Ellyn
• Population of McHenry
• Population of Lockport
• Population of Edwardsville