Outline Map of Maine
This map is a basic black and white map showing the county lines as its only details.
Source: Indiana State University

Maps of Maine (REQUIRES ADOBE ACROBAT)
If you're looking for a special kind of Maine map, you should not have any problem finding it here! They have everything from county line maps to satellite imagery maps.
Source: Maine Office of GIS

Annual Average Precipitation Map
This map shows the average annual rainfall in the state.
Source: Spatial Climate Analysis Service, Oregon State University

Town Maps of Maine
Select a town from the pull down menu, hit go and a beautiful color map will appear showing you where the city is in the state of Maine. This is a great resource for exploring Maine more carefully.
Source: Maine Office of GIS

Maine State Map
If you need a map that shows the major freeways in Maine, this is it!
Source: World Sites Atlas

Maps of Acadia National Park
Get many maps of Maine's own Acadia Park from the Library of Congress at this very neat site.
Source: American Memory - Library of Congress

Merriam Webster Atlas
This atlas page shows the Maine state map and some quick facts. There is also a good explanation of the symbolism of the state flag.
Source: The New York Times and Merriam Webster

Learn more with the help of Google.