Maryland has 23 Counties plus the independent City of Baltimore (not part of any County) and 8 Congressional Districts: 18 counties are wholly within one congressional district; 5 counties- along with the independent City of Baltimore- are divided among more than one congressional district.

UNDIVIDED COUNTIES (those wholly within one Congressional District):

• CD # 1: Caroline, Cecil, Dorchester, Kent, Queen Anne's, Somerset, Talbot, Wicomico and Worcester
• CD # 2: Harford
• CD # 5: Calvert, Charles and St. Mary's
• CD # 6: Allegany, Carroll, Frederick, Garrett and Washington

DIVIDED COUNTIES (those split among more than one Congressional District)

• Anne Arundel: CDs 1, 2, 3 and 5
• Baltimore County [NOTE: this is NOT the City of Baltimore nor does it include the City of Baltimore]: CDs 2, 3 and 7
• Howard: CDs 3 and 6
• Montgomery: CDs 4 and 8 [CD # 8 is wholly within Montgomery County]
• Prince George's: CDs 4 and 5

The independent City of Baltimore is divided among CDs 1, 3 and 7.