Maine is divided into 8 tourism regions...
(Locations on grids are abreviated)

South Coast
(South Coast)
Greater Portland & Casco Bay
(Portland, Airport, GP South, GP North)
Mid-Coast
(Mid Coast)
Downeast & Acadia
(Downeast)
Aroostook County
(Aroostook)
The Maine Highlands
(Highlands)
Kennebec & Moose River Valleys
(Valleys)
Maine Lakes & Mountains
(Lakes & Mtns)
For an interactive version of this map & descriptions of each region click here.