O Fallon Condos for Sale

There are 171 real estate listings found in O Fallon, IL. View our O Fallon real estate area information to learn about the weather, local school districts, demographic data, and general information about O Fallon, IL. Get in touch with an O Fallon real estate agent who can help you find the home of your dreams in O Fallon. Use our mortgage calculator to see how much it would be to finance a home in O Fallon. Not ready to buy yet? Find and compare apartments for rent in O Fallon.