Katahdin is a mountain in Piscataquis County, Maine, US.
Katahdin may also refer to: Katahdin Falls, tallest waterfall in Maine Arctic Katahdin Butterfly Katahdin sheep, a breed of domestic sheep developed in Maine Katahdin Iron Works, a Maine state historic site Katadhin (steamboat), a steamboat on Moosehead Lake USS Katahdin, two United States Navy vessels
See also Katahdin Woods and Waters National Monument, a National Monument adjacent to Mount Katahdin