Morningside came into existence in 1949 when residents incorporated a triangular piece of suburban Prince George’s County adjacent to Andrews Air Force Base. The new municipality was without paved roads and relied on well water and septic tanks for utilities.
Initially, the majority of the residents were veterans of World War II and later of the Vietnam War. In the late 1970s, the make up of the town slowly began to change. By the end of the 20th century, only about a quarter of the residents were veterans. Many of the residents now are civilian personnel working at the various government agencies in the area.