Single Member District (SMDs) were created pursuant to legislation approving the District of Columbia's Home Rule charter in 1973. These neighborhood groups provide the District electorate with grass-roots experience in the electoral process. SMDs are based on the 2020 Census of the District's population, with each SMD having approximately 2,000 residents. Representatives elected to each Single Member District sit as Advisory Neighborhood Commissioners.This dataset reflects the SMD boundaries delineated in the Advisory Neighborhood Commission Boundaries Act of 2022, signed into law on June 16, 2022. They are in effect beginning January 1, 2023.