A Dunbar education became synonymous with academic excellence and became desired around the state. In 1931, the North Central Association of Colleges and Schools (NCA) endorsed Dunbar's academics with regional accreditation. Dunbar was the only black high school in Arkansas with NCA accreditation until 1938, when Fort Smith's Lincoln High School was added. Dunbar became a junior high in 1955 when Horace Mann High School opened as the last black high school in segregated Little Rock.
The National Dunbar Alumni Association of Little Rock (NDAA) continues the legacy of Dunbar High School. With chapters in Chicago, Detroit, Los Angeles, Denver, Seattle, St. Louis, Washington, D.C., San Francisco and Little Rock, the NDAA has dedicated itself to "perpetuating the ‘Dunbar Spirit' of excellence" through community service and by documenting the history of Dunbar High School.