For most of the second half of the 20th century, the area of Long Neck was sparsely populated, except for several mobile home communities that served mostly as summer vacation properties for permanent residents of the Washington, DC, Baltimore, Maryland, Wilmington, Delaware, and Philadelphia, Pennsylvania metropolitan areas. However, in the late 1990s, more permanent, year-round communities began being built, such as the neighborhood surrounding the golf course at Baywood Greens, and The Peninsula, which is being developed by Jack Nicklaus. Long Neck is now seeing unprecedented growth in permanent residents.