1991 Maryland Congressional Districts (Adopted by Chapter 4 of the 2nd Special Session of 1991)
Population by Race, 1990 Census 
                                                 Pct.    All      All     Pct.
                  Total   White African-Am African-Am  Other Minority Minority Hispanic
DISTRICT 4      597,690 200,081  349,499     58.47%   48,110  411,767   68.89%   37,962
Montgomery      159,345  93,645   43,238     27.13%   22,462   73,865   46.36%   17,913
Prince George's 438,345 106,436  306,261     69.87%   25,648  337,902   77.09%   20,049