Demographic Profile of the Elderly "Demographic Profile of the Elderly in the District of Columbia" provides data highlighting areas such as the size of the District's elderly population as well as age, race and sex characteristics. To order, contact: Office on Aging 441 4th Street, NW, Suite 900S Washington, DC 20001 Information and Assistance: (202) 724-5626 Main Office: (202) 724-5622 Fax: (202) 724-4979 TDD-TTY: (202) 724-8925.