found: Maps of Madison County, Granite, Madison & Pontoon Beach, Illinois, c1979
found: GNIS Dec. 28, 1999(Pontoon Beach, Illinois, pop pl., Madison County, 38°43ʹ54ʺN/90°04ʹ49ʺW)
found: Rand McNally comm atlas, 1998(Pontoon Beach; Madison)
found: Columbia gaz.(Pontoon Beach, village, Madison co., SW Ill., residential suburb 8 mi/12.9 km NE of downtown St. Louis (Mo.), 3 mi/4.8 km NE of Granite City)
notfound: Lippincott;MW geog. dict.
found: GeoNames, algorithmically matched, 2009(ppl; 38°43ʹ54ʺN 090°04ʹ49ʺW)