| Name | Location | Region | Type |
| 1811 Lincoln County Museum & Old Jail | Wiscasset | Mid Coast | Prison |
| Abbe Museum | Bar Harbor | Down East | Native American |
| Abbot Historical Society Museum | Abbot | Maine Highlands | History |
| Abbott Museum | Dexter | Maine Highlands | History |
| Abbott School (Castine, Maine) | Castine | Down East | History |
| Acadian Village (Maine) | Van Buren | Maine Lake Country | Open air |
| Acton-Shapleigh Historical Society | Acton | Southern Maine Coast | History |
| Alexander-Crawford Historical Society | Alexander | Down East | History |
| Alfred Shaker Museum | Alfred | Southern Maine Coast | Religion |
| Allagash Historical Society Museum | Allagash | Maine Lake Country | History |
| Androscoggin Historical Society | Auburn | Western Maine Mountains | History |
| Aroostook County Historical & Art Museum | Houlton | Maine Lake Country | History |
| Ashland Logging Museum | Ashland | Maine Lake Country | Industry |
| Bangor Museum and Center for History | Bangor | Maine Highlands | History |
| Bangor Police Museum | Bangor | Maine Highlands | Law enforcement |
| Bar Harbor Historical Society Museum | Bar Harbor | Down East | History |
| Bar Harbor Whale Museum | Bar Harbor | Down East | Natural history |
| Barracks Museum | Eastport | Down East | History |
| Bates College Museum of Art | Lewiston | Western Maine Mountains | Art |
| Baxter House Museum | Gorham | Southern Maine Coast | Historic house |
| Belfast Museum | Belfast | Mid Coast | History |
| Benjamin C. Wilder Farmstead | Washburn | Maine Lake Country | Historic house |
| Bethel Historical Society's Regional History Center | Bethel | Western Maine Mountains | History |
| Blacksmith Shop Museum | Dover-Foxcroft | Maine Highlands | Industry |
| Blaine House | Augusta | Kennebec | Historic house |
| Blue Hill Historical Society | Blue Hill | Down East | Historic house |
| Bowdoin College Museum of Art | Brunswick | Mid Coast | Art |
| Boothbay Railway Village | Boothbay | Mid Coast | Railway |
| Boothbay Region Historical Society | Boothbay Harbor | Mid Coast | History |
| Brick Store Museum | Kennebunk | Southern Maine Coast | History |
| Brooklin Keeping Historical Society | Brooklin | Down East | Historical society |
| Brooksville Historical Society | Brooksville | Down East | Historical society |
| Brownville Historical Society | Brownville | Maine Highlands | History |
| Bryant Stove & Music Museum | Thorndike | Mid Coast | Collectibles |
| Bucksport Historical Society Museum | Bucksport | Down East | History |
| Burnham Tavern Museum | Machias | Down East | Historic house |
| Burnt Island Light | Boothbay | Mid Coast | Maritime |
| Camden Area History Center | Camden | Mid Coast | History |
| Caribou Historical Center & Museum | Caribou | Maine Lake Country | History |
| Castle Tucker | Wiscasset | Mid Coast | Historic house |
| Center for Maine Contemporary Art | Rockport | Mid Coast | Art |
| Chebeague Island Historical Society | Chebeague Island | Southern Maine Coast | Local history |
| Cherryfield-Narrag Historical Society | Cherryfield | Down East | History |
| Children's Discovery Museum of Maine | Augusta | Kennebec | Children's |
| Children's Museum of Maine | Portland | Southern Maine Coast | Children's |
| Clewley Museum | Brewer | Maine Highlands | History |
| Colburn House State Historic Site | Pittston | Kennebec | Historic house |
| Colby College Museum of Art | Waterville | Kennebec | Art |
| Cole Land Transportation Museum | Bangor | Maine Highlands | Transportation |
| Colonial Pemaquid State Historic Site | New Harbor | Mid Coast | Multiple |
| Camden-Rockport Historical Society | Rockport | Mid Coast | Open air |
| Corinth Historical Society | Cornish | Southern Maine Coast | Local history |
| Counting House Museum | South Berwick | Southern Maine Coast | Historic house |
| Country Store Museum (Maine) | Bass Harbor | Down East | History |
| Cranberry House | Great Cranberry Island | Down East | Local history |
| Davistown Museum | Liberty | Mid Coast | Multi |
| Dead River Area Historical Society | Eustis | Maine Lake Country | History |
| Deer Isle-Stonington Historical Society | Deer Isle | Down East | Historic house |
| Dennys River Historical Society | Dennysville | Down East | Historical society |
| Desert of Maine | Freeport | Mid Coast | Multiple |
| Dixfield Historical Society | Dixfield | Western Maine Mountains | Historical society |
| Downeast Heritage Museum | Calais | Down East | History |
| Dry Mills Schoolhouse Museum | Gray | Southern Maine Coast | Education |
| Eagle Island State Historic Site | Eagle Island | Southern Maine Coast | Historic house |
| Falmouth Heritage Museum | Falmouth | Southern Maine Coast | History |
| Farnsworth Art Museum | Rockland | Mid Coast | Art |
| Fawcett's Antique Toy & Art Museum | Waldoboro | Mid Coast | Toy |
| Fifth Maine Regiment Museum | Peaks Island | Southern Maine Coast | Military |
| Fishermen’s Museum at Pemaquid | Bristol | Mid Coast | Maritime |
| Fort Kent Blockhouse | Fort Kent | Maine Lake Country | Military |
| Fort Kent Historical Society Museum | Fort Kent | Maine Lake Country | Railroad |
| Fort Knox | Prospect | Mid Coast | Military |
| Fort McClary State Historic Site | Kittery Point | Southern Maine Coast | Military |
| Frenchville Historical Society | Frenchville | Maine Lake Country | Railway |
| Frenchboro Historical Society | Frenchboro | Down East | Local history |
| Frontier Heritage Historical Society | Fort Fairfield | Maine Lake Country | Multi |
| Fryeburg Fair Farm Museum | Fryeburg | Western Maine Mountains | Agriculture |
| Fryeburg Historical Society Museum | Fryeburg | Western Maine Mountains | Historical society |
| Gates House | Machiasport | Down East | Historic house |
| General Henry Knox Museum | Thomaston | Mid Coast | Historic house |
| Georgetown Historical Society | Georgetown | Mid Coast | Local history |
| George B. Dorr Museum of Natural History | Bar Harbor | Down East | Natural history |
| Gibbs Avenue Museum | Bridgton | Southern Maine Coast | History |
| Gray Historical Society | Gray | Southern Maine Coast | Historical society |
| Great Harbor Maritime Museum | Northeast Harbor | Down East | Maritime |
| Grist Mill Museum | Dexter | Maine Highlands | History |
| Guilford Historical Society | Guilford | Maine Highlands | Historical society |
| Hamilton House | South Berwick | Southern Maine Coast | Historic house |
| Hamlin Memorial Library and Museum | Paris | Western Maine Mountains | History |
| Hampden Historical Society | Hampden | Maine Highlands | Historical society |
| Harmon Museum | Old Orchard Beach | Southern Maine Coast | History |
| Harpswell Historical Society Museum | Harpswell | Mid Coast | History |
| Harriman School Museum | Sebec | Maine Highlands | History |
| Harrington House | Freeport | Southern Maine Coast | History |
| Haystack Historical Society | Mapleton | Maine Lake Country | History |
| Hendricks Hill Museum | Southport | Mid Coast | Historic house |
| Hope Historical Society House and Museum | Hope | Mid Coast | Historic house |
| Hose 5 Fire Museum | Bangor | Maine Highlands | Fire |
| Hudson Museum | Orono | Maine Highlands | Anthropology |
| International Cryptozoology Museum | Portland | Southern Maine Coast | Natural history |
| Islesboro Historical Society | Islesboro | Down East | History |
| Islesford Historical Museum | Little Cranberry Island | Down East | Local history |
| Jay Historical Society | Jay | Maine Lake Country | Historic house |
| Jonathan Fisher House | Blue Hill | Down East | Historic house |
| Joshua L. Chamberlain Museum | Brunswick | Mid Coast | Historic house |
| Kennebunkport History Center | Kennebunkport | Southern Maine Coast | Open air |
| Kenneth E. Stoddard Shell Museum | Boothbay | Mid Coast | Natural history |
| Kingfield Historical House | Kingfield | Maine Lake Country | Historic house |
| Kittery Historical & Naval Museum | Kittery | Southern Maine Coast | Maritime |
| Lagerstrom House | Woodland | Maine Lake Country | Historic house |
| L. C. Bates Museum | Hinckley | Somerset | Natural history |
| Limington Historical Society | Limington | Southern Maine Coast | Historical society |
| Lincolnville Historical Society School House Museum | Lincolnville | Mid Coast | School |
| Lindbergh Crate Museum | Canaan | Somerset | Collectible |
| Loring Military Heritage Center | Limestone | Maine Lake Country | Military |
| Lovell Historical Society | Lovell | Western Maine Mountains | History |
| Maine Air Museum | Bangor | Maine Highlands | Aviation |
| Maine Discovery Museum | Bangor | Maine Highlands | Children's |
| Maine Folklife Center | Orono | Maine Highlands | Culture |
| Maine Forest & Logging Museum | Bradley | Maine Highlands | Industry |
| Maine Granite Industry Museum | Mount Desert | Down East | Industry |
| Maine Historical Society Museum | Portland | Southern Maine Coast | History |
| Maine Lighthouse Museum | Rockland | Mid Coast | Lighthouse |
| Maine Maritime Museum | Bath | Mid Coast | Maritime |
| Maine Military Historical Society Museum | Augusta | Kennebec | Military |
| Maine Narrow Gauge Railroad Museum | Portland | Southern Maine Coast | Railroad |
| Maine State Aquarium | Boothbay Harbor | Mid Coast Maine | Aquarium |
| Maine State Building | Poland | Western Maine Mountains | Art |
| Maine State Museum | Augusta | Kennebec | Multiple |
| Mainely Critters Wildlife Museum | Dixfield | Western Maine Mountains | Natural history |
| Maine's Paper and Heritage Museum | Livermore Falls | Western Maine Mountains | Industry |
| Margaret Chase Smith Library | Skowhegan | Somerset | Biographical |
| Marrett House | Standish | Southern Maine Coast | Historic house |
| Mason House | Bethel | Western Maine Mountains | Historic house |
| Matthews Museum of Maine Heritage | Union | Mid Coast | Agriculture |
| McLellan-Sweat Mansion | Portland | Southern Maine Coast | Historic house |
| Meetinghouse Museum | Wells | Southern Maine Coast | History |
| Mexico Historical Society | Mexico | Western Maine Mountains | Historic house |
| Milbridge Historical Museum | Milbridge | Down East | History |
| Millinocket Historical Society | Millinocket | Maine Highlands | History |
| Milo Historical Society | Milo | Maine Highlands | History |
| Monhegan Museum | Monhegan | Mid Coast | History |
| Monmouth Museum (Maine) | Monmouth | Kennebec | Open air |
| Moosehead Historical Museum | Greenville | Maine Highlands | History |
| Moosehead Marine Museum | Greenville | Maine Highlands | Maritime |
| Mount Desert Oceanarium | Bar Harbor | Down East | Industry |
| Mount Desert Oceanarium | Southwest Harbor | Down East | Industry |
| Musée culturel du Mont-Carmel | Lille | Maine Lake Country | Historic site |
| Museum L-A | Lewiston | Western Maine Mountains | Industry |
| Museum of African Culture | Portland | Southern Maine Coast | Culture |
| Museum of Yarmouth History | Yarmouth | Southern Maine Coast | History |
| Museums of Old York | York | Southern Maine Coast | Open air |
| Musical Wonder House | Wiscasset | Mid Coast | Collectibles |
| Naples Historical Society | Naples | Southern Maine Coast | Historical society |
| Narramissic | Bridgton | Southern Maine Coast | Historic house |
| Neal Dow Memorial | Portland | Southern Maine Coast | Historic house |
| New England Museum of Telephones | Ellsworth | Down East | Industry |
| New Sweden Historical Society Museum | New Sweden | Maine Lake Country | History |
| Nickels-Sortwell House | Wiscasset | Mid Coast | Historic house |
| Nobleboro Historical Center | Nobleboro | Mid Coast | History |
| Nordica Homestead Museum | Farmington | Maine Lake Country | Historic house |
| Norridgewock Historical Society Museum | Norridgewock | Somerset | History |
| Northeast Historic Film Museum | Bucksport | Down East | Media |
| Northern Maine Museum of Science | Presque Isle | Maine Lake Country | Natural history |
| Northern Timber Cruisers Antique Snowmobile Museum | Millinocket | Maine Highlands | Transportation |
| Nott House | Kennebunkport | Southern Maine Coast | Historic house |
| Nowetah's American Indian Museum | New Portland | Somerset | Native American |
| Nylander Museum | Caribou | Maine Lake Country | Natural history |
| Oakfield Railroad Museum | Oakfield | Maine Lake Country | Railway |
| Observer Building Museum | Dover-Foxcroft | Maine Highlands | History |
| Ogunquit Museum of American Art | Ogunquit | Southern Maine Coast | Art |
| Ogunquit Heritage Museum | Ogunquit | Southern Maine Coast | History |
| Old Fort Western | Augusta | Kennebec | History |
| Old Post Office (Liberty, Maine) | Liberty | Mid Coast | History |
| Old Town Museum | Old Town | Maine Highlands | History |
| Olson House | Cushing | Mid Coast | Historic house |
| Orland Historical Society | Orland | Down East | Historical society |
| Owls Head Transportation Museum | Owls Head | Mid Coast | Transportation |
| Page Farm & Home Museum | Orono | Maine Highlands | Historic house |
| Patten Lumbermen's Museum | Patten | Maine Highlands | Industry |
| Peary–MacMillan Arctic Museum | Brunswick | Mid Coast | Anthropological |
| Pejepscot Museum | Brunswick | Mid Coast | History |
| Pelletier-Marquis House | St. Agatha | Maine Lake Country | Historic house |
| Penobscot Marine Museum | Searsport | Mid Coast | Maritime |
| Penobscot Nation Museum | Old Town | Maine Highlands | Native American |
| Pettengill Farm | Freeport | Southern Maine Coast | Farm |
| Phillips Historical Society | Phillips | Maine Lake Country | Railway |
| Portland Fire Museum | Portland | Southern Maine Coast | Fire |
| Portland Head Light | Cape Elizabeth | Southern Maine Coast | Lighthouse |
| Portland Museum of Art | Portland | Southern Maine Coast | Art |
| Presque Isle Air Museum | Presque Isle | Maine Lake Country | Aviation |
| Presque Isle Historical Society | Presque Isle | Maine Lake Country | Historical society |
| Project PuffinVisitor Center | Rockland | Mid Coast | Natural history |
| Quoddy Dam Model Museum | Eastport | Down East | Technology |
| Quoddy Maritime Museum | Eastport | Down East | Maritime |
| Rangeley Lakes Region Logging Museum | Rangeley | Maine Lake Country | Industry |
| Raye's Mustard Mill Museum | Eastport | Down East | Industry |
| Raymond-Casco Historical Society | Casco | Southern Maine Coast | Local history |
| Readfield Historical Society and Museum | Readfield | Kennebec | Local history |
| Redington Museum | Waterville | Kennebec | Historic house |
| Rier Sardine Museum | Lubec | Down East | Industry |
| Robinson House (Maine) | Bethel | Western Maine Mountains | Historic house |
| Rufus Porter Museum | Bridgton | Southern Maine Coast | Art |
| Ruggles House Museum | Columbia Falls | Down East | Historic house |
| Rumford Historical Society Museum | Rumford | Western Maine Mountains | School |
| Sabbathday Lake Shaker Village | New Gloucester | Southern Maine Coast | Religious |
| Saco Museum | Saco | Southern Maine Coast | Multi |
| St. Agathe Historical Society Museum | Saint Agatha | Maine Lake Country | History |
| Sandy River & Rangeley Lakes Railroad | Phillips | Maine Lake Country | Railway |
| Sarah Orne Jewett House | South Berwick | Southern Maine Coast | Historic house |
| Sayward-Wheeler House | York Harbor | Southern Maine Coast | Historic house |
| Scarborough Historical Society and Museum | Scarborough | Southern Maine Coast | History |
| Seal Cove Auto Museum | Seal Cove | Down East | Automotive |
| Seashore Trolley Museum | Kennebunkport | Southern Maine Coast | Railway |
| Sebago Historical Society | Sebago | Southern Maine Coast | History |
| Sedgwick-Brooklin Historical Society Museum | Sedgwick | Down East | History |
| Ski Museum of Maine | Farmington | Maine Lake Country | Sports |
| Skolfield-Whittier House | Brunswick | Mid Coast | Historic house |
| Skowhegan History House | Skowhegan | Somerset | History |
| Skyline Farm | North Yarmouth | Southern Maine Coast | Transportation |
| Snowman School House | Woodland | Maine Lake Country | School |
| Somesville Museum | Mount Desert Island | Down East | History |
| Sound School House Museum | Mount Desert Island | Down East | History |
| South Bristol Historical Society | South Bristol | Mid Coast | Historical society |
| Southern Aroostook Agricultural Museum | Littleton | Maine Lake Country | Agriculture |
| South Portland Historical Society | South Portland | Southern Maine Coast | Historical society |
| St Croix Historical Society | Calais | Down East | Historic house |
| Stanley Museum | Kingfield | Maine Lake Country | History |
| Stanwood Wildlife Sanctuary | Ellsworth | Down East | Historic house |
| Stockholm Historical Society Museum | Stockholm | Maine Lake Country | History |
| Tante Blanche Museum | Madawaska | Maine Lake Country | Open air |
| Tate House Museum | Portland | Southern Maine Coast | Historic house |
| Thomaston Historical Society | Thomaston | Mid Coast | History |
| Tides Institute and Museum of Art | Eastport | Down East | Art |
| Umbrella Cover Museum | Peaks Island | Southern Maine Coast | Collectible |
| Union Historical Society | Union | Mid Coast | Historic house |
| University of Maine Museum of Art | Bangor | Maine Highlands | Art |
| University of Southern Maine Art Gallery | Portland | Southern Maine Coast | Art |
| University of Southern Maine Art Gallery | Gorham | Southern Maine Coast | Art |
| University of Southern Maine Atrium Gallery | Lewiston | Western Maine Mountains | Art |
| Victoria Mansion | Portland | Southern Maine Coast | Historic house |
| Vinalhaven Historical Society Museum | Vinalhaven | Mid Coast | History |
| Wadsworth-Longfellow House | Portland | Southern Maine Coast | Historic house |
| Waponahki Tribal Museum | Passamaquoddy Pleasant Point Reservation | Down East | Native American |
| Washburn-Norlands Living History Center | Livermore | Western Maine Mountains | Living |
| Wells Auto Museum | Wells | Southern Maine Coast | Automotive |
| Wendell Gilley Museum | Southwest Harbor | Down East | Art |
| West Quoddy Head Light House Visitor Center | Lubec | Down East | Maritime |
| Wilhelm Reich Museum | Rangeley | Maine Lake Country | Biographical |
| Willowbrook Museum Village | Newfield | Southern Maine Coast | Open air |
| Wilson Museum | Castine | Down East | Multiple |
| Wilton Farm & Home Museum | Wilton | Maine Lake Country | History |
| Wiscasset, Waterville, and Farmington Railway Museum | Alna | Mid Coast | Railway |
| Woodlawn Museum | Ellsworth | Down East | Historic house |
| Woolwich History Museum | Woolwich | Mid Coast | History |