Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| New England Power Company Number 5 | Dam | 352 | Franklin | 42 43 18 N | 072 56 16 W |
| New England Power Number 4 Dam | Dam | 155 | Franklin | 42 37 12 N | 072 44 40 W |
| New Home Sewing Machine Company Dam | Dam | 156 | Franklin | 42 35 24 N | 072 18 28 W |
| New Pond Dam | Dam | 39 | Bristol | 42 01 24 N | 071 08 16 W |
| New Pond Dam | Dam | 174 | Worcester | 42 04 18 N | 071 55 16 W |
| Newfield Pond Dam | Dam | 36 | Middlesex | 42 37 54 N | 071 23 10 W |
| Newton Lower Falls Dam | Dam | 16 | Middlesex | 42 19 30 N | 071 15 28 W |
| Newton Pond Dam | Dam | 118 | Worcester | 42 18 30 N | 071 44 58 W |
| Newton Reservoir Dam | Dam | 287 | Worcester | 42 36 06 N | 072 10 28 W |
| Newton Upper Falls Dam | Dam | 27 | Middlesex | 42 18 48 N | 071 13 34 W |
| Nichols Road Dam | Dam | 12 | Norfolk | 42 15 18 N | 070 48 34 W |
| Nine Lot Dam | Dam | 65 | Hampden | 42 03 00 N | 072 41 10 W |
| Nipmuck Pond Dam | Dam | 199 | Worcester | 42 05 00 N | 071 50 22 W |
| Noannet Pond Dam | Dam | 72 | Norfolk | 42 14 12 N | 071 14 16 W |
| Noquochoke Lake Dam | Dam | 22 | Bristol | 41 38 24 N | 071 02 52 W |
| Norcross Number 2 Dam | Dam | 262 | Hampden | 42 02 54 N | 072 15 58 W |
| Norcross Number Four Dam | Dam | 271 | Hampden | 42 02 00 N | 072 15 40 W |
| Norcross Number Three Dam | Dam | 262 | Hampden | 42 02 42 N | 072 15 46 W |
| North Canal Outlet Dam | Dam | 15 | Essex | 42 42 24 N | 071 08 52 W |
| North Hill Marsh Dam | Dam | 18 | Plymouth | 42 02 48 N | 070 42 22 W |
| North Nashua River Dam | Dam | 189 | Worcester | 42 33 54 N | 071 50 34 W |
| North Pond Brook Dam | Dam | 188 | Franklin | 42 34 42 N | 072 19 46 W |
| North Pond Dam | Dam | 105 | Worcester | 42 10 54 N | 071 33 10 W |
| North Reservoir Dam | Dam | 63 | Middlesex | 42 27 24 N | 071 07 04 W |
| North Silver Lake Dam | Dam | 391 | Berkshire | 42 05 42 N | 073 06 58 W |
| North Webster Village Pond Dam | Dam | 148 | Worcester | 42 03 48 N | 071 52 52 W |
| Northampton Reservoir Lower Dam | Dam | 204 | Franklin | 42 26 12 N | 072 40 58 W |
| Northampton Reservoir Upper Dam | Dam | 211 | Franklin | 42 26 30 N | 072 41 10 W |
| Northborough Reservoir Dam | Dam | 140 | Worcester | 42 19 42 N | 071 41 28 W |
| Northern Canal Head Gates Dam | Dam | 40 | Middlesex | 42 38 54 N | 071 19 46 W |
| Northfield Mountain Reservoir Dam | Dam | 300 | Franklin | 42 37 02 N | 072 26 11 W |
| Northfield School Upper Reservoir Dam | Dam | 213 | Franklin | 42 43 12 N | 072 25 16 W |
| Norton Reservoir Dam | Dam | 31 | Bristol | 41 59 00 N | 071 11 22 W |
| Norumbega Reservoir Dam and East Dike | Dam | 79 | Middlesex | 42 20 06 N | 071 17 34 W |
| Norumbega Reservoir Dikes Number 2 | Dam | 92 | Middlesex | 42 19 54 N | 071 17 52 W |
| Norumbega Reservoir Dikes Number 3 | Dam | 92 | Middlesex | 42 19 54 N | 071 17 52 W |
| Noruumberga Reservoir Dike Number 4 | Dam | 89 | Middlesex | 42 19 42 N | 071 17 52 W |
| Norwood Pond Dam | Dam | 18 | Essex | 42 35 12 N | 070 52 28 W |
| Notch Reservoir Dam | Dam | 380 | Berkshire | 42 40 18 N | 073 08 16 W |
| Notown Reservoir Dam | Dam | 234 | Worcester | 42 32 30 N | 071 48 58 W |
| Notown Reservoir Dike | Dam | 230 | Worcester | 42 32 48 N | 071 49 40 W |
| Noyes Pond Dam | Dam | 443 | Hampden | 42 06 24 N | 073 00 58 W |
| Noyes Pond Dam | Dam | 355 | Worcester | 42 30 06 N | 071 54 58 W |
| Number Five Reservoir Dam | Dam | 229 | Worcester | 42 02 36 N | 072 04 52 W |
| Number Four Reservoir Dam | Dam | 212 | Worcester | 42 02 52 N | 072 04 35 W |
| Nye Bog Reservoir Dam | Dam | 3 | Plymouth | 41 45 55 N | 070 37 10 W |
| Old Berkshire Mill Dam | Dam | 353 | Berkshire | 42 28 12 N | 073 10 04 W |
| Old Grist Mill Pond Dam | Dam | 91 | Worcester | 42 10 24 N | 071 36 10 W |
| Old Guard Locks Dam | Dam | 37 | Middlesex | 42 38 36 N | 071 19 46 W |
| Old Mill Pond Dam | Dam | 120 | Worcester | 42 04 30 N | 071 42 46 W |
| Old Oaken Bucket Pond Dam | Dam | 9 | Plymouth | 42 10 48 N | 070 44 58 W |
| Old Pond Dam | Dam | 31 | Bristol | 42 01 24 N | 071 07 52 W |
| Old Pumping Station Dam | Dam | 71 | Middlesex | 42 33 12 N | 071 34 22 W |
| Old Quincy Reservoir Dam | Dam | 26 | Norfolk | 42 13 12 N | 071 00 58 W |
| Old Shepherd Pond Dam | Dam | 204 | Worcester | 42 04 54 N | 071 56 04 W |
| Onota Lake Dam | Dam | 330 | Berkshire | 42 28 36 N | 073 15 58 W |
| Orrs Pond Dam | Dam | 34 | Bristol | 41 55 42 N | 071 20 10 W |
| Ortolani Number Three Dam | Dam | 9 | Plymouth | 41 47 06 N | 070 39 28 W |
| Ortolani Number Two Dam | Dam | 11 | Plymouth | 41 47 12 N | 070 39 40 W |
| Otis Reservoir Dam | Dam | 432 | Berkshire | 42 09 36 N | 073 03 28 W |
| Otter River Dam | Dam | 269 | Worcester | 42 35 48 N | 072 03 04 W |
| Overlook Reservoir Dam | Dam | 251 | Worcester | 42 35 36 N | 071 48 58 W |
| Overlook Reservoir Dam | Dam | 255 | Worcester | 42 35 54 N | 071 48 58 W |
| Overlook Reservoir Dike | Dam | 255 | Worcester | 42 35 54 N | 071 48 58 W |
| Packard Dam | Dam | 78 | Middlesex | 42 19 30 N | 071 27 58 W |
| Packard Pond Dam | Dam | 187 | Franklin | 42 38 00 N | 072 14 10 W |
| Padanaram Breakwater | Dam | -3 | Bristol | 41 34 25 N | 070 56 23 W |
| Palmer Brook Dam | Dam | 524 | Berkshire | 42 16 48 N | 073 06 28 W |
| Palmer Reservoir Upper Dam | Dam | 166 | Hampden | 42 09 42 N | 072 18 40 W |
| Paradise Lake Dam | Dam | 216 | Hampden | 42 05 42 N | 072 20 16 W |
| Paradise Pond Dam | Dam | 43 | Hampshire | 42 19 00 N | 072 38 28 W |
| Parker Mills Pond Dam | Dam | 4 | Plymouth | 41 46 06 N | 070 43 23 W |
| Parker Pond Dam | Dam | 289 | Worcester | 42 34 30 N | 072 00 52 W |
| Parker Reservoir Dam | Dam | 99 | Hampshire | 42 18 48 N | 072 33 22 W |
| Parker River Dam | Dam | 11 | Essex | 42 45 00 N | 070 56 28 W |
| Parker River Dam | Dam | 13 | Essex | 42 45 18 N | 070 56 46 W |
| Parker River Dam at Central Street | Dam | 3 | Essex | 42 45 00 N | 070 55 34 W |
| Parker Road Bog Dam | Dam | 4 | Barnstable | 41 35 36 N | 070 34 16 W |
| Partridgeville Pond Dam | Dam | 332 | Worcester | 42 32 48 N | 072 02 28 W |
| Patch Reservoir Dam | Dam | 164 | Worcester | 42 16 06 N | 071 51 04 W |
| Pawtucket Dam | Dam | 27 | Middlesex | 42 38 55 N | 071 19 53 W |
| Pelham Lake Dam | Dam | 430 | Franklin | 42 42 00 N | 072 53 40 W |
| Pelton Dam | Dam | 448 | Berkshire | 42 03 24 N | 073 07 10 W |
| Pentucket Pond Outlet Dam | Dam | 23 | Essex | 42 43 48 N | 070 59 28 W |
| Pepperell Paper Company Dam | Dam | 72 | Middlesex | 42 40 00 N | 071 34 58 W |
| Peppers Mill Pond Dam | Dam | 128 | Hampshire | 42 16 48 N | 072 18 10 W |
| Perley Brook Reservoir Dam | Dam | 310 | Worcester | 42 35 18 N | 072 00 16 W |
| Perryville Pond Dam | Dam | 122 | Worcester | 42 01 30 N | 071 53 04 W |
| Peter Pond Dam | Dam | 166 | Worcester | 42 03 36 N | 071 53 40 W |
| Peters Pond Dam | Dam | 44 | Middlesex | 42 42 36 N | 071 15 16 W |
| Petersons Saw Mill Pond Dam | Dam | 24 | Plymouth | 42 03 30 N | 070 44 46 W |
| Peyser Dam | Dam | 267 | Berkshire | 42 07 06 N | 073 20 16 W |
| Phelon Pond Dam | Dam | 360 | Hampden | 42 06 24 N | 072 54 16 W |
| Phillipston Reservoir Dam | Dam | 324 | Worcester | 42 34 42 N | 072 10 46 W |
| Phoenix Pond Dam | Dam | 78 | Middlesex | 42 32 30 N | 071 38 46 W |
| Pierce Avenue Dam | Dam | 22 | Plymouth | 41 48 48 N | 070 59 46 W |
| Pierce Pond Dam | Dam | 144 | Worcester | 42 32 18 N | 071 46 52 W |
| Pierce Pond Dam | Dam | 337 | Worcester | 42 33 24 N | 071 57 16 W |
| Pikes Pond Dam | Dam | 218 | Worcester | 42 09 48 N | 071 56 16 W |
| Pilchs Number Three Dam | Dam | 161 | Hampshire | 42 15 12 N | 072 17 34 W |
| Pillings Pond Dam | Dam | 39 | Essex | 42 31 30 N | 071 01 28 W |
| Pine Island Lake Dam | Dam | 311 | Hampshire | 42 20 12 N | 072 46 34 W |
| Pine Lake Dam | Dam | 26 | Plymouth | 42 02 00 N | 070 43 28 W |
| Pine Tree Brook Dam | Dam | 28 | Norfolk | 42 14 42 N | 071 05 22 W |
| Pine Tree Brook Reservoir Dam | Dam | 20 | Norfolk | 42 14 06 N | 071 05 16 W |
| Pink Reservoir Number 1 Dam | Dam | 25 | Plymouth | 41 52 54 N | 070 48 58 W |
| Pink Reservoir Number 2 Dam | Dam | 36 | Plymouth | 41 52 42 N | 070 49 10 W |
| Pit Pond Dam | Dam | 25 | Plymouth | 42 02 00 N | 070 43 34 W |
| Plantain Pond Dam | Dam | 543 | Berkshire | 42 04 00 N | 073 26 16 W |
| Plazas Pond Dam | Dam | 206 | Franklin | 42 37 48 N | 072 17 28 W |