​The Census 2000 Supplementary Survey was designed to demonstrate the feasibility of collecting long form-type information at the same time but separately from the decennial census. It used the American Community Survey questionnaire to collect demographic, social, economic, and housing data from a sample of 700,000 households nationwide.

 Estimates for Maryland and The United States (Revised November, 2001)

 Estimates for Maryland Jurisdictions with a Population Over 250,000​