 The eastern boundary is formed with the city boundary of Bowie, then by Chestnut Avenue and High Bridge Road, then again by the boundary of Bowie.The southern boundary of Glenn Dale is formed by Annapolis Road (Maryland Route 450), and the western boundary follows the stream called Folly Branch, then Lanham-Severn Road (Maryland Route 564), then Greenbelt Road (Route 193), returning to Good Luck Road.As of the census of 2000, there were 12,609 people, 4,086 households, and 3,305 families residing in the CDP.