Population of O'Fallon, Missouri as of February 2025. How many people live in O'Fallon today?

The exact population of O'Fallon, Missouri as of February 2025 is estimated at 91,316 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 O'Fallon.

Check out more data on population in Missouri:

• Population of Kansas City
• Population of Columbia
• Population of Blue Springs
• Population of Wentzville
• Population of Ballwin
• Population of Mehlville
• Population of Belton
• Population of Sedalia
• Population of Creve Coeur
• Population of Kirksville
• Population of Lemay
• Population of Carthage
• Population of Jennings
• Population of Festus
• Population of Troy
• Population of Eureka
• Population of Bolivar