Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Main Street Historic District | Park | 132 | Oxford | 44 00 53 N | 070 58 47 W |
| Mainayr Campground | Locale | 19 | Washington | 44 30 34 N | 067 58 40 W |
| Maine | Populated Place | 125 | Aroostook | 46 49 12 N | 067 55 23 W |
| Maine Aquarium | Building | 23 | York | 43 31 54 N | 070 25 31 W |
| Maine Aquarium Heliport | Airport | 26 | Cumberland | 43 31 46 N | 070 25 31 W |
| Maine Archives and Museums | Building | 12 | Cumberland | 43 39 28 N | 070 15 11 W |
| Maine Art Gallery | Building | 28 | Lincoln | 44 00 21 N | 069 39 57 W |
| Maine Avenue Cemetery | Cemetery | 23 | Kennebec | 44 15 08 N | 069 46 25 W |
| Maine Business Enterprise Park | Locale | 64 | Penobscot | 44 48 15 N | 068 48 13 W |
| Maine Center for the Arts | Building | 36 | Penobscot | 44 53 58 N | 068 40 03 W |
| Maine Charitable Mechanic Association Library | Building | 28 | Cumberland | 43 39 23 N | 070 15 41 W |
| Maine Christian Association | Church | 27 | Penobscot | 44 53 27 N | 068 40 17 W |
| Maine Coast Artists Gallery | Building | 7 | Knox | 44 11 13 N | 069 04 17 W |
| Maine Coast Mall Shopping Center | Locale | 39 | Hancock | 44 31 52 N | 068 24 33 W |
| Maine Coast Memorial Hospital | Hospital | 58 | Hancock | 44 32 49 N | 068 24 58 W |
| Maine College of Art | School | 33 | Cumberland | 43 39 14 N | 070 15 52 W |
| Maine College of Art Library | Building | 33 | Cumberland | 43 39 14 N | 070 15 52 W |
| Maine Commerce and Industrial Center | Locale | 72 | Androscoggin | 44 03 59 N | 070 16 34 W |
| Maine Department of Inland Fisheries and Wildlife Game Farm | Locale | 91 | Cumberland | 43 55 26 N | 070 21 04 W |
| Maine Department of Marine Resources Aquarium | Building | -3 | Lincoln | 43 50 43 N | 069 38 23 W |
| Maine Department of Marine Resources Bigelow Laboratory | Building | -3 | Lincoln | 43 50 43 N | 069 38 23 W |
| Maine Department of Social Services | Building | 63 | Hancock | 44 31 38 N | 068 24 07 W |
| Maine District Courthouse | Building | 164 | Aroostook | 47 21 06 N | 068 18 00 W |
| Maine Eye and Ear Infirmary (historical) | Hospital | 38 | Cumberland | 43 39 14 N | 070 16 23 W |
| Maine Folklife Center | Building | 36 | Penobscot | 44 54 03 N | 068 40 08 W |
| Maine Forestry Service | Building | 45 | Cumberland | 43 40 55 N | 070 28 24 W |
| Maine Gate Factory Store Shopping Center | Locale | 8 | York | 43 06 10 N | 070 44 28 W |
| Maine Hall | Building | 22 | Cumberland | 43 54 32 N | 069 57 43 W |
| Maine Historical Society Building | Building | 23 | Cumberland | 43 39 23 N | 070 15 31 W |
| Maine Historical Society Library | Building | 23 | Cumberland | 43 39 23 N | 070 15 31 W |
| Maine History Gallery | Building | 23 | Cumberland | 43 39 23 N | 070 15 32 W |
| Maine Information Center | Building | 20 | York | 43 07 28 N | 070 43 03 W |
| Maine Mall | Building | 16 | Cumberland | 43 38 02 N | 070 20 08 W |
| Maine Maritime Museum | Building | 2 | Sagadahoc | 43 53 37 N | 069 48 53 W |
| Maine Maritime Museum Library Archives | Building | 6 | Sagadahoc | 43 53 38 N | 069 48 54 W |
| Maine Medical Center | Hospital | 40 | Cumberland | 43 39 11 N | 070 16 32 W |
| Maine Medical Center Library | Building | 38 | Cumberland | 43 39 10 N | 070 16 33 W |
| Maine New Hampshire Bridge | Bridge | -6 | York | 43 05 11 N | 070 45 37 W |
| Maine Publicity Bureau Building | Building | 7 | Cumberland | 43 38 42 N | 070 16 42 W |
| Maine River | Stream | | Washington | 45 04 56 N | 067 34 43 W |
| Maine School for the Deaf | School | 19 | Cumberland | 43 41 16 N | 070 13 55 W |
| Maine School of Science and Mathematics | School | 202 | Aroostook | 46 54 27 N | 067 49 48 W |
| Maine Square Mall Shopping Center | Locale | 34 | Penobscot | 44 50 15 N | 068 44 40 W |
| Maine State Building | Building | 175 | Androscoggin | 44 01 43 N | 070 21 40 W |
| Maine State Department of Transportation Building | Building | 40 | Hancock | 44 31 54 N | 068 24 16 W |
| Maine State Information Center | Building | 41 | Cumberland | 43 47 08 N | 070 11 38 W |
| Maine State Pier | Locale | 4 | Cumberland | 43 39 23 N | 070 14 47 W |
| Maine State Prison | Building | 33 | Knox | 44 04 35 N | 069 11 46 W |
| Maine State Prison Library | Building | 33 | Knox | 44 04 35 N | 069 11 46 W |
| Maine State Reformatory for Women (historical) | Locale | 55 | Somerset | 44 45 47 N | 069 43 21 W |
| Maine Veterans Memorial Cemetery | Cemetery | 88 | Kennebec | 44 21 10 N | 069 47 23 W |
| Maine Watercraft Museum | Building | 0 | Knox | 44 04 16 N | 069 10 48 W |
| Maine Yankee Energy Information Center | Building | 20 | Lincoln | 43 59 17 N | 069 40 45 W |
| Maine Yankee Nuclear Power Plant | Locale | 44 | Lincoln | 43 57 05 N | 069 41 45 W |
| Maine Youth Center Library | Building | 28 | Cumberland | 43 38 15 N | 070 18 29 W |
| Mainland Cove | Bay | 127 | Washington | 45 32 15 N | 067 48 38 W |
| Mainstream | Populated Place | 116 | Somerset | 44 58 10 N | 069 30 25 W |
| Mainstream Mountain | Summit | 235 | Somerset | 44 57 47 N | 069 29 49 W |
| Mainstream Pond | Lake | 92 | Somerset | 44 59 14 N | 069 29 39 W |
| Mainstream Station (historical) | Locale | 95 | Somerset | 44 57 40 N | 069 30 55 W |
| Major Island | Island | -3 | Washington | 44 52 34 N | 067 00 41 W |
| Malabeam Lake | Reservoir | 188 | Aroostook | 46 55 42 N | 067 55 10 W |
| Malabeam Lake Dam | Dam | 188 | Aroostook | 46 55 42 N | 067 55 10 W |
| Malaga Island | Island | 12 | Sagadahoc | 43 46 54 N | 069 52 30 W |
| Malaga Island | Island | -2 | York | 42 58 56 N | 070 36 47 W |
| Malbons Mills | Populated Place | 58 | Somerset | 44 47 46 N | 069 41 07 W |
| Malcolm Branch | Stream | | Aroostook | 46 25 26 N | 068 44 04 W |
| Malcolm Ledge | Bar | -5 | Knox | 43 52 05 N | 068 46 33 W |
| Malcome Bog | Swamp | 166 | Washington | 45 27 32 N | 067 44 36 W |
| Malden Island | Island | 4 | Sagadahoc | 43 49 16 N | 069 42 25 W |
| Mall Plaza Shopping Center | Locale | 16 | Cumberland | 43 38 18 N | 070 20 02 W |
| Mallars Island | Island | 313 | Piscataquis | 45 41 26 N | 069 35 45 W |
| Mallison Falls | Falls | 31 | Cumberland | 43 43 38 N | 070 25 13 W |
| Mallison Falls Dam | Dam | 30 | Cumberland | 43 43 42 N | 070 25 10 W |
| Mallon Brook | Stream | | Sagadahoc | 44 04 28 N | 069 52 49 W |
| Maloy Mountain | Summit | 179 | York | 43 41 48 N | 070 42 00 W |
| Man Island | Island | 8 | Washington | 44 29 17 N | 067 31 10 W |
| Man O'War Brook Falls | Falls | 38 | Hancock | 44 19 08 N | 068 19 12 W |
| Man of War Brook | Stream | | Hancock | 44 19 04 N | 068 18 55 W |
| Manana Island | Island | 25 | Lincoln | 43 45 49 N | 069 19 32 W |
| Manana Island Fog Station | Locale | 21 | Lincoln | 43 45 48 N | 069 19 34 W |
| Manchester | Populated Place | 65 | Kennebec | 44 19 28 N | 069 51 37 W |
| Manchester Point | Cape | 6 | Hancock | 44 17 39 N | 068 18 10 W |
| Manchester School | School | 92 | Cumberland | 43 49 54 N | 070 26 08 W |
| Manhanock Pond | Reservoir | 137 | Piscataquis | 45 09 30 N | 069 21 16 W |
| Manhanock Pond Dam | Dam | 141 | Piscataquis | 45 09 48 N | 069 21 16 W |
| Manhanock Pond Dam | Dam | 137 | Piscataquis | 45 09 30 N | 069 21 16 W |
| Manks Corner | Populated Place | 42 | Lincoln | 44 10 26 N | 069 20 00 W |
| Manley Island | Island | 137 | Washington | 45 40 04 N | 067 44 47 W |
| Mann Bog | Swamp | 81 | Hancock | 44 40 42 N | 068 34 49 W |
| Mann Brook | Stream | | Hancock | 44 40 14 N | 068 33 05 W |
| Mann Hill | Summit | 139 | Androscoggin | 44 07 28 N | 070 02 31 W |
| Mann Hill | Summit | 394 | Oxford | 44 33 54 N | 070 30 21 W |
| Mann Hill | Summit | 141 | Penobscot | 44 46 05 N | 068 38 49 W |
| Mann Meadow | Swamp | 72 | Hancock | 44 27 32 N | 068 30 21 W |
| Mann Mountain | Summit | 209 | York | 43 36 22 N | 070 51 55 W |
| Mann Pond | Lake | 137 | York | 43 36 32 N | 070 52 10 W |
| Manning Cemetery | Cemetery | 81 | Cumberland | 43 54 11 N | 070 30 56 W |
| Mannings Farm | Island | 1 | Washington | 44 26 46 N | 067 36 09 W |
| Mansell Brook | Stream | | Piscataquis | 45 24 16 N | 069 37 38 W |
| Mansell Brook | Stream | | Somerset | 45 45 49 N | 069 45 00 W |
| Mansell Mountain | Summit | 282 | Hancock | 44 18 23 N | 068 21 41 W |
| Mansell Mountain Trail | Trail | 272 | Hancock | 44 18 25 N | 068 21 37 W |
| Mansell Pond | Lake | 58 | Penobscot | 45 02 24 N | 068 44 06 W |
| Manset | Populated Place | 18 | Hancock | 44 16 05 N | 068 18 46 W |
| Manset Union Church | Church | 22 | Hancock | 44 15 57 N | 068 18 34 W |
| Mansfield Creek | Stream | | Washington | 44 37 16 N | 067 35 18 W |
| Mansfield Ledge | Bench | 290 | Penobscot | 45 03 43 N | 069 11 16 W |
| Mansfield Pond | Lake | 110 | Knox | 44 15 04 N | 069 11 55 W |
| Manson Corner | Populated Place | 104 | Somerset | 44 51 44 N | 069 28 27 W |