Geography Pontoon Beach is located in southwestern Madison County northeast of St. Louis. It is bordered to the west by Granite City, to the northwest by Mitchell, to the north by Edwardsville, the Madison county seat, to the east by Glen Carbon, to the southeast by Collinsville, to the south by Fairmont City, and to the southwest by Madison.
Geography Pontoon Beach is located in southwestern Madison County northeast of St. Louis. It ,is bordered to the west by Granite City, to the northwest by Mitchell, to the north by Edwardsville the Madison county seat, to the east by Glen Carbon, to the southeast by Collinsville, to the south by Fairmont City, and to the southwest by Madison.