Pontoon Beach is a village in Madison County, Illinois, United States. The population was 5,876 at the 2020 census. It is part of the St. Louis metropolitan area. Geography Pontoon Beach is located in southwestern Madison County at (38.726078, -90.060505), 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. Illinois Route 111 runs through the village center, leading north to Wood River and south to Fairmont City. Illinois Route 162 crosses Route 111 south of the village center; it leads east to Troy and southwest five miles to Madison. Interstate 255 runs through the east part of the village limits, with access from Exit 26 (Horseshoe Lake Road) and Exit 29 (IL 162). Interstate 270 crosses the northern part of the village, with access from Exit 6 (IL 111). According to the U.S. Census Bureau, Pontoon Beach has a total area of , of which are land and , or 19.92%, are water. The village is in the American Bottom region, part of the Mississippi River floodplain. A portion of Horseshoe Lake, an oxbow lake that is a former channel of the Mississippi, is in the southwest part of the village. Demographics As of the census of 2000, there were 5,620 people, 2,134 households, and 1,519 families residing in the village. The population density was . There were 2,341 housing units at an average density of . The racial makeup of the village was 87.72% White, 8.88% African American, 0.55% Native American, 0.78% Asian, 0.02% Pacific Islander, 0.71% from other races, and 1.33% from two or more races. Hispanic or Latino of any race were 1.92% of the population. There were 2,134 households, out of which 38.0% had children under the age of 18 living with them, 48.9% were married couples living together, 16.0% had a female householder with no husband present, and 28.8% were non-families. 22.0% of all households were made up of individuals, and 6.9% had someone living alone who was 65 years of age or older. The average household size was 2.62 and the average family size was 3.06. In the village, the population was spread out, with 28.2% under the age of 18, 11.0% from