Population of Frankfort, Illinois as of April 2025. How many people live in Frankfort today?

The exact population of Frankfort, Illinois as of April 2025 is estimated at 20,296 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 Frankfort.

Check out more data on population in Illinois:

• Population of Chicago
• Population of Peoria
• Population of Highland Park
• Population of Orland Park
• Population of Normal
• Population of Elmhurst
• Population of Bartlett
• Population of Quincy
• Population of Carpentersville
• Population of Calumet City
• Population of O'Fallon
• Population of Niles
• Population of Burbank
• Population of Granite City
• Population of Oak Forest
• Population of Alton
• Population of Homer Glen