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MD Regions
Appalachian Region (5) Eastern Shore (37)
Southern Maryland (26) Western Maryland (11)
Western Shore (4)

States
Delaware (3) District of Columbia (62)
Maryland (186) Maryland and Delaware (62)
Maryland and Pennsylvania (1) Maryland and Virginia (40)
Mid-Atlantic (32) Virginia (13)

Counties
Allegany County (44) Anne Arundel County (65) Baltimore County (123) Calvert County (33)
Caroline County (31) Carroll County (54) Cecil County (57) Charles County (53)
Dorchester County (52) Frederick County (65) Garrett County (49) Harford County (50)
Howard County (43) Kent County (34) Montgomery County (183) Prince George's County (139)
Queen Anne's County (29) Somerset County (43) St. Mary's County (42) Talbot County (35)
Washington County (49) Wicomico County (41) Worcester County (50)

Cities
Annapolis (19) Baltimore City (234) Bel Air (9) Bethesda (26) Betterton (1)
Bladensburg (6) Bowie (10) Brandywine (2) Brunswick (1) Bryans Road (1)
Cabin John (2) Cambridge (1) Catoctin Mountains (1) Chesapeake Bay (6) Chestertown (3)
Cheverly (1) Chevy Chase (3) Clarksburg (1) Colesville (7) College Park (16)
Columbia (3) Cumberland (6) Decatur Heights (1) Delmar (3) District Heights (1)
Dundalk (2) Easton (1) Elkton (2) Essex (1) Forest Heights (1)
Frederick (5) Frostburg (2) Gaithersburg (9) Germantown (9) Glen Burnie (2)
Glenarden (2) Glenn Dale (2) Greenbelt (3) Hagerstown (10) Harbour Towne (1)
Harper's Ferry (1) Havre de Grace (2) Hillandale (1) Hyattsville (5) Kensington (11)
La Plata (2) Landover (4) Langley Park (4) Largo (4) Laurel (13)
Middle River (1) Ocean City (1) Olney (4) Piscataway Park (1) Poolesville (1)
Potomac (5) Reisterstown (3) Riverdale (4) Rockville (12) Salisbury (9)
Sandy Spring (1) Silver Spring (15) Suitland (3) Takoma Park (10) Taneytown (1)
Towson (9) Upper Marlboro (5) Westminster (5) Wheaton (12)

Railroad
Baltimore and Ohio Railroad (36)

Waterway
Anacostia River (5) Chesapeake Bay (76)
Patuxent River (8) Potomac River (19)
Severn River (1)

Region
France (1) Liberia (1) United States (8)