Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Penman Rips | Rapids | 46 | Washington | 44 48 14 N | 067 47 04 W |
| Pennaman Brook | Stream | | Washington | 45 07 13 N | 067 59 31 W |
| Pennamaquan Lake | Lake | 23 | Washington | 45 00 26 N | 067 13 45 W |
| Pennamaquan Lake | Reservoir | 25 | Washington | 44 59 06 N | 067 11 52 W |
| Pennamaquan River | Stream | | Washington | 44 55 00 N | 067 06 42 W |
| Pennamaquan River Dam | Dam | 25 | Washington | 44 59 06 N | 067 11 52 W |
| Pennamaquan River Reservoir | Reservoir | 20 | Washington | 44 57 48 N | 067 09 40 W |
| Pennamaquan River Reservoir | Reservoir | 18 | Washington | 44 57 36 N | 067 09 40 W |
| Pennell Junior High School | School | 94 | Cumberland | 43 53 17 N | 070 19 40 W |
| Pennell Pond | Reservoir | 244 | Somerset | 44 56 00 N | 070 06 34 W |
| Pennell Pond Dam | Dam | 244 | Somerset | 44 56 00 N | 070 06 34 W |
| Pennellville | Populated Place | 11 | Cumberland | 43 51 37 N | 069 57 41 W |
| Pennellville Historic District | Park | 10 | Cumberland | 43 51 36 N | 069 57 39 W |
| Pennesseewassee Lake | Reservoir | 119 | Oxford | 44 12 48 N | 070 32 46 W |
| Pennesseewassee Lake Dam | Dam | 119 | Oxford | 44 12 48 N | 070 32 46 W |
| Pennesseewassee Stream | Stream | | Oxford | 44 12 12 N | 070 31 41 W |
| Penney Pond | Lake | 81 | Kennebec | 44 24 23 N | 069 49 50 W |
| Pennington Brook | Stream | | Aroostook | 47 01 16 N | 068 34 45 W |
| Pennington Mountain | Summit | 522 | Aroostook | 46 58 15 N | 068 30 04 W |
| Pennington Pond | Lake | 277 | Aroostook | 46 56 12 N | 068 31 28 W |
| Penny Brook | Stream | | Waldo | 44 35 45 N | 069 08 28 W |
| Penny Cemetery | Cemetery | 64 | Hancock | 44 46 46 N | 068 22 19 W |
| Penny Island | Island | 129 | Cumberland | 44 05 00 N | 070 44 20 W |
| Penobscot | Populated Place | 11 | Hancock | 44 27 52 N | 068 42 40 W |
| Penobscot (historical) | Populated Place | 24 | Hancock | 44 23 16 N | 068 47 59 W |
| Penobscot Bald Mountain | Summit | 248 | Penobscot | 45 20 41 N | 067 59 52 W |
| Penobscot Bay | Bay | 0 | Knox | 44 11 14 N | 068 55 16 W |
| Penobscot Bay Medical Center | Hospital | 35 | Knox | 44 08 38 N | 069 05 05 W |
| Penobscot Bay Medical Center Heliport | Airport | 48 | Knox | 44 08 32 N | 069 04 54 W |
| Penobscot Bridge | Bridge | 1 | Penobscot | 44 47 57 N | 068 45 49 W |
| Penobscot Brook | Stream | | Somerset | 45 52 19 N | 070 07 34 W |
| Penobscot Christian School | School | 41 | Penobscot | 44 50 11 N | 068 49 18 W |
| Penobscot Church | Church | 27 | Hancock | 44 24 31 N | 068 41 54 W |
| Penobscot County | Civil | 53 | Penobscot | 45 15 02 N | 068 39 58 W |
| Penobscot County Courthouse | Building | 17 | Penobscot | 44 48 07 N | 068 46 21 W |
| Penobscot County Law Library | Building | 17 | Penobscot | 44 48 07 N | 068 46 21 W |
| Penobscot Elementary School | School | 18 | Hancock | 44 28 07 N | 068 42 33 W |
| Penobscot Experimantal Forest | Forest | 48 | Penobscot | 44 51 05 N | 068 37 39 W |
| Penobscot Farm | Locale | 306 | Piscataquis | 45 53 31 N | 069 36 43 W |
| Penobscot Hall | Building | 33 | Penobscot | 44 53 50 N | 068 40 14 W |
| Penobscot Indian Island Reservation | Civil | 39 | Penobscot | 45 12 00 N | 068 37 09 W |
| Penobscot Indian Reservation | Reserve | 36 | Penobscot | 44 57 14 N | 068 39 04 W |
| Penobscot Island | Island | 18 | Knox | 44 05 26 N | 068 48 53 W |
| Penobscot Lake | Reservoir | 488 | Somerset | 45 54 42 N | 070 13 16 W |
| Penobscot Lake Dam | Dam | 488 | Somerset | 45 54 42 N | 070 13 16 W |
| Penobscot Mountain | Summit | 350 | Hancock | 44 19 58 N | 068 16 00 W |
| Penobscot Mountain Trail | Trail | 292 | Hancock | 44 19 39 N | 068 15 52 W |
| Penobscot National Historical Society Building | Building | 34 | Penobscot | 44 56 51 N | 068 39 13 W |
| Penobscot Pond | Lake | 383 | Piscataquis | 45 41 00 N | 069 12 16 W |
| Penobscot River | Stream | | Hancock | 44 26 27 N | 068 49 41 W |
| Penobscot River Reservoir | Reservoir | 1 | Penobscot | 44 48 36 N | 068 44 28 W |
| Penobscot River Reservoir | Reservoir | 6 | Penobscot | 44 49 54 N | 068 42 04 W |
| Penobscot River Reservoir | Reservoir | 18 | Penobscot | 44 55 12 N | 068 37 52 W |
| Penobscot River Reservoir | Reservoir | 30 | Penobscot | 44 56 30 N | 068 38 52 W |
| Penobscot River Reservoir | Reservoir | 41 | Penobscot | 45 15 00 N | 068 38 58 W |
| Penobscot United Methodist Church | Church | 15 | Hancock | 44 27 56 N | 068 42 35 W |
| Penobscot Valley Church of Christ | Church | 44 | Penobscot | 44 59 55 N | 068 53 08 W |
| Penobscot Valley High School | School | 51 | Penobscot | 45 14 50 N | 068 39 43 W |
| Penobscot Valley Hospital | Hospital | 110 | Penobscot | 45 21 18 N | 068 30 08 W |
| Penobscot-Piscataquis Wildlife Management Area | Park | 143 | Piscataquis | 45 05 00 N | 069 07 43 W |
| Penobscot-Valley Country Club | Locale | 56 | Penobscot | 44 51 36 N | 068 41 21 W |
| Penobscott River Reservoir | Reservoir | 73 | Penobscot | 45 34 12 N | 068 24 34 W |
| Penquis Valley High School | School | 99 | Piscataquis | 45 15 05 N | 068 59 45 W |
| Penquis Valley Middle School | School | 99 | Piscataquis | 45 15 05 N | 068 59 45 W |
| Pentecostal Church of God | Church | 63 | Penobscot | 45 21 51 N | 068 30 22 W |
| Peoples Church | Church | 175 | Aroostook | 46 03 01 N | 067 56 44 W |
| Peoples United Methodist Church | Church | 11 | Cumberland | 43 38 23 N | 070 14 33 W |
| Peoples United Methodist Church | Church | 11 | Knox | 44 03 03 N | 069 07 38 W |
| Peoples United Methodist Church | Church | 316 | Piscataquis | 45 27 39 N | 069 36 56 W |
| Pepperell Park | Park | 19 | York | 43 29 56 N | 070 26 17 W |
| Peppermint Brook | Stream | | Piscataquis | 45 19 05 N | 069 29 24 W |
| Pepperpot Pond | Lake | 457 | Oxford | 44 55 06 N | 070 54 39 W |
| Pepperrell Cove | Bay | -10 | York | 43 04 47 N | 070 42 01 W |
| Pequawket Dam | Dam | 86 | York | 43 45 48 N | 070 40 52 W |
| Pequawket Pond | Lake | 110 | Oxford | 43 54 33 N | 070 50 30 W |
| Perch Island | Island | 107 | Hancock | 45 05 19 N | 068 08 34 W |
| Perch Island | Island | -5 | Lincoln | 43 51 02 N | 069 35 37 W |
| Perch Pond | Reservoir | 408 | Aroostook | 46 56 24 N | 068 51 46 W |
| Perch Pond Dam | Dam | 408 | Aroostook | 46 56 24 N | 068 51 46 W |
| Percival P Baxter School | School | 17 | Cumberland | 43 40 36 N | 070 17 01 W |
| Percy and Small Dock | Locale | 5 | Sagadahoc | 43 53 35 N | 069 48 51 W |
| Perham | Populated Place | 197 | Aroostook | 46 50 39 N | 068 11 50 W |
| Perham First Baptist Church | Church | 197 | Aroostook | 46 50 40 N | 068 11 50 W |
| Perham Hill | Summit | 215 | Franklin | 44 41 29 N | 070 05 24 W |
| Perham Hill | Summit | 215 | Piscataquis | 45 17 44 N | 069 04 40 W |
| Perham Junction | Populated Place | 371 | Franklin | 44 55 16 N | 070 24 37 W |
| Perham Stream | Stream | | Franklin | 44 54 18 N | 070 23 51 W |
| Perio Point | Cape | 0 | Washington | 44 31 19 N | 067 36 39 W |
| Perk Pond | Lake | 509 | Franklin | 45 00 04 N | 070 40 39 W |
| Perkins | Populated Place | 154 | Penobscot | 45 36 46 N | 068 49 01 W |
| Perkins Brook | Stream | | Waldo | 44 33 17 N | 068 52 18 W |
| Perkins Brook | Stream | | York | 43 15 14 N | 070 47 25 W |
| Perkins Brook | Stream | | York | 43 18 43 N | 070 43 23 W |
| Perkins Cemetery | Cemetery | 168 | Waldo | 44 26 08 N | 069 25 25 W |
| Perkins Cove | Bay | 4 | York | 43 14 05 N | 070 35 12 W |
| Perkins Hill | Summit | 72 | Hancock | 44 27 25 N | 068 44 34 W |
| Perkins Hill | Summit | 101 | Kennebec | 44 16 16 N | 069 47 51 W |
| Perkins House | Building | 36 | Hancock | 44 23 19 N | 068 48 12 W |
| Perkins Island | Island | 14 | Sagadahoc | 43 47 12 N | 069 47 01 W |
| Perkins Island Ledge | Bar | -2 | Sagadahoc | 43 46 51 N | 069 47 10 W |
| Perkins Island Light Station | Locale | 5 | Sagadahoc | 43 47 07 N | 069 47 04 W |
| Perkins Marsh Brook | Stream | | York | 43 24 57 N | 070 39 29 W |
| Perkins Mountain | Summit | 63 | Hancock | 44 24 18 N | 068 45 07 W |
| Perkins Point | Cape | -2 | Hancock | 44 24 28 N | 068 49 16 W |
| Perkins Point | Cape | 31 | Lincoln | 44 00 02 N | 069 32 51 W |
| Perkins Ridge | Ridge | 147 | Androscoggin | 44 08 15 N | 070 17 36 W |
| Perkins Town | Populated Place | 67 | York | 43 20 18 N | 070 42 16 W |
| Perley Brook | Stream | | Aroostook | 47 14 28 N | 068 34 51 W |
| Perley Hill | Summit | 175 | Cumberland | 43 59 07 N | 070 39 43 W |
| Perley Meadow | Swamp | 134 | Cumberland | 43 58 35 N | 070 39 38 W |