Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Murphy Dam | Dam | 385 | Rusk | 45 34 30 N | 091 30 40 W |
| Murray 2WP375 Dam | Dam | 430 | Price | 45 42 12 N | 090 35 01 W |
| Murrays 2WP1034 Dam | Dam | 337 | Bayfield | 46 29 30 N | 091 20 43 W |
| Musser 2WP235 Dam | Dam | 454 | Price | 45 44 30 N | 090 17 13 W |
| Musser Dam | Dam | 450 | Price | 45 44 27 N | 090 17 20 W |
| Namekgon WP320 Dam | Dam | 421 | Bayfield | 46 13 24 N | 091 08 49 W |
| Navarino Marsh 1 G12.470 Dam | Dam | 238 | Shawano | 44 39 30 N | 088 36 00 W |
| Navarino Marsh 2 G12.470 Dam | Dam | 238 | Shawano | 44 39 12 N | 088 36 00 W |
| Navarino Marsh 3 G12.470 Dam | Dam | 238 | Shawano | 44 38 60 N | 088 36 00 W |
| Necedah Dam | Dam | 272 | Juneau | 44 01 33 N | 090 04 15 W |
| Necedah Wildlife Refuge 30 Dam | Dam | 288 | Juneau | 44 08 36 N | 090 10 30 W |
| Necedah Wildlife Refuge 33 Dam | Dam | 288 | Juneau | 44 08 42 N | 090 12 18 W |
| Neenah Dam | Dam | 225 | Winnebago | 44 11 12 N | 088 27 24 W |
| Nekoosa WP348 Dam | Dam | 289 | Wood | 44 18 48 N | 089 53 36 W |
| Nelligan Lake 2WP2564 Dam | Dam | 242 | Marinette | 45 09 12 N | 088 08 48 W |
| Nelson 3WR87 Dam | Dam | 441 | Taylor | 45 16 18 N | 090 26 07 W |
| Nelson G 7414 Dam | Dam | 314 | Iowa | 42 55 48 N | 089 55 54 W |
| Nelsonville Dam | Dam | 321 | Portage | 44 29 39 N | 089 18 42 W |
| Neopit Dam | Dam | 321 | Menominee | 44 58 50 N | 088 49 45 W |
| Nepco Lake Dam | Dam | 297 | Wood | 44 20 26 N | 089 50 36 W |
| Neshkoro Dam | Dam | 242 | Marquette | 43 57 48 N | 089 13 06 W |
| Neshonoc 2WP44239 Dam | Dam | 211 | La Crosse | 43 54 49 N | 091 04 29 W |
| Neshoto Dam | Dam | 180 | Manitowoc | 44 10 36 N | 087 39 00 W |
| New Auburn Wildlife Area G12 565 Dam | Dam | 326 | Barron | 45 14 54 N | 091 33 49 W |
| New Lisbon 2WP254 Dam | Dam | 267 | Juneau | 43 52 60 N | 090 09 45 W |
| New Richmond Mills Dam | Dam | 299 | St. Croix | 45 07 24 N | 092 32 13 W |
| New Wood H2.117 Dam | Dam | 445 | Lincoln | 45 18 48 N | 089 56 48 W |
| Newburg Dam | Dam | 260 | Washington | 43 26 06 N | 088 02 54 W |
| Nick Henrichs G-9011 Dam | Dam | 411 | Taylor | 45 09 30 N | 090 29 01 W |
| Nordby Dam | Dam | 342 | Barron | 45 13 30 N | 092 02 13 W |
| Normington E7395 Dam | Dam | 297 | Jackson | 44 21 12 N | 090 32 18 W |
| North Midwest Cranberry Company WP99 Dam | Dam | 304 | Burnett | 45 53 60 N | 092 02 19 W |
| North Pelican Lake 1909C361 Dam | Dam | 479 | Oneida | 45 38 06 N | 089 14 36 W |
| North Scott Township Dam | Dam | 295 | Monroe | 44 08 30 N | 090 22 42 W |
| North Tomah Cranberry Company 3WR483 Dam | Dam | 288 | Monroe | 44 01 18 N | 090 29 18 W |
| Northridge Lakes G 3180 Dam | Dam | 222 | Milwaukee | 43 10 30 N | 087 59 48 W |
| O'Neil Flowage 1 E12.206 Dam | Dam | 324 | Chippewa | 45 11 60 N | 091 21 19 W |
| O'Neil Flowage 2 E12.206 Dam | Dam | 323 | Chippewa | 45 11 32 N | 091 21 36 W |
| Oak Street Dam | Dam | 255 | Sauk | 43 27 60 N | 089 44 42 W |
| Oakland 3 WR 1801 Dam | Dam | 254 | Jefferson | 43 00 00 N | 088 58 12 W |
| Oconomowoc Lake 1899C288 Dam | Dam | 266 | Waukesha | 43 06 17 N | 088 28 07 W |
| Oconto Marsh Wildlife Area 3WR350 Dam | Dam | 178 | Oconto | 44 54 24 N | 087 50 42 W |
| Oetzman G7046 Dam | Dam | 331 | Sauk | 43 22 12 N | 090 01 54 W |
| Ogdensburg 1855c325 Dam | Dam | 262 | Waupaca | 44 27 15 N | 089 01 59 W |
| Ogema E3247 Dam | Dam | 473 | Price | 45 26 30 N | 090 17 43 W |
| Oines H1807 Dam | Dam | 239 | Trempealeau | 44 05 30 N | 091 14 25 W |
| Okauchee Lake 2WP1438 Dam | Dam | 266 | Waukesha | 43 06 44 N | 088 26 53 W |
| Old Paper Mill Dam | Dam | 253 | Walworth | 42 49 48 N | 088 43 30 W |
| Old Stone Mill 3SE470 Dam | Dam | 250 | Walworth | 42 50 00 N | 088 43 48 W |
| Onion River Dam | Dam | 241 | Sheboygan | 43 40 36 N | 087 56 42 W |
| Orienta Dam | Dam | 201 | Bayfield | 46 44 49 N | 091 29 05 W |
| Ormsby Dam | Dam | 463 | Langlade | 45 15 25 N | 089 14 56 W |
| Oslo Dam | Dam | 228 | Manitowoc | 44 05 56 N | 087 49 23 W |
| Osseo Dam | Dam | 290 | Trempealeau | 44 34 36 N | 091 13 25 W |
| Osseo Rod and Gun Club Dam | Dam | 299 | Trempealeau | 44 33 42 N | 091 13 49 W |
| Otter Creek 12 3WR1178 Dam | Dam | 267 | Iowa | 43 01 48 N | 090 12 30 W |
| Otter Lake 2WP315 Dam | Dam | 347 | Chippewa | 45 05 26 N | 090 57 11 W |
| Otter Rapids 1905c483 Dam | Dam | 493 | Vilas | 45 54 12 N | 089 19 12 W |
| Otter Rapids Dam | Dam | 493 | Vilas | 45 54 12 N | 089 19 13 W |
| Owen City Dam | Dam | 378 | Clark | 44 56 54 N | 090 34 00 W |
| Oxford Dam | Dam | 258 | Marquette | 43 46 54 N | 089 34 36 W |
| Pabst Dam | Dam | 259 | Walworth | 42 49 42 N | 088 29 12 W |
| Paper Mill Dam | Dam | 235 | Monroe | 43 56 30 N | 090 48 12 W |
| Pardeeville 2WP832 Dam | Dam | 247 | Columbia | 43 32 18 N | 089 18 00 W |
| Parfrey Dam | Dam | 220 | Richland | 43 20 06 N | 090 23 30 W |
| Park Creek Pond G1997 2 Dam | Dam | 326 | Douglas | 46 21 03 N | 091 49 16 W |
| Patrick J Meyer 3NW78801 Dam | Dam | 435 | Taylor | 45 11 18 N | 090 28 01 W |
| Pattison State Park WP433 Dam | Dam | 302 | Douglas | 46 32 06 N | 092 07 19 W |
| Pawlisch E6039 Dam | Dam | 335 | Juneau | 43 41 24 N | 090 05 06 W |
| Peacock Dam | Dam | 262 | Waukesha | 43 07 00 N | 088 29 54 W |
| Pella 1882c38 Dam | Dam | 255 | Shawano | 44 44 22 N | 088 48 11 W |
| Pemebonwon Dam | Dam | 238 | Marinette | 45 39 18 N | 087 49 24 W |
| Perry Creek Dam | Dam | 264 | Jackson | 44 15 30 N | 090 47 31 W |
| Pershing Wildlife Area 1 G12.575 Dam | Dam | 386 | Taylor | 45 15 60 N | 090 47 30 W |
| Peshtigo 1843C36 Dam | Dam | 184 | Marinette | 45 03 12 N | 087 44 54 W |
| Peshtigo Harbor Wildlife Area H2.117 Dam | Dam | 321 | Marinette | 45 58 18 N | 087 42 36 W |
| Petenwell 2WP722 Dam | Dam | 268 | Juneau | 44 03 24 N | 090 01 12 W |
| Petenwell Dam | Dam | 281 | Juneau | 44 03 27 N | 090 01 13 W |
| Peterson Bellach Group Dam | Dam | 282 | Pierce | 45 50 12 N | 092 39 13 W |
| Peterson D5187 Dam | Dam | 259 | Waushara | 44 10 54 N | 089 06 48 W |
| Peterson G9917 Dam | Dam | 274 | Richland | 43 14 60 N | 090 36 48 W |
| Pewaukee Hi.2 Dam | Dam | 260 | Waukesha | 43 05 05 N | 088 15 51 W |
| Phlox WP269 Dam | Dam | 395 | Langlade | 45 03 12 N | 089 00 44 W |
| Pickerel Canal 2WP185 Dam | Dam | 486 | Oneida | 45 52 24 N | 089 32 07 W |
| Pickerel Control 2WP185 Dam | Dam | 484 | Oneida | 45 52 24 N | 089 31 49 W |
| Pickerel Lake 2 WP1430 Dam | Dam | 402 | Oconto | 45 21 42 N | 088 35 00 W |
| Pigeon Creek Flowage G129 Dam | Dam | 426 | Rusk | 45 37 48 N | 091 29 13 W |
| Pike Lake 2WP1323 Dam | Dam | 304 | Washington | 43 19 18 N | 088 20 00 W |
| Pine River 3WR1564 Dam | Dam | 241 | Waushara | 44 09 06 N | 089 04 30 W |
| Pine River Dam | Dam | 356 | Florence | 45 49 43 N | 088 15 15 W |
| Pine River WP146 Dam | Dam | 363 | Florence | 45 49 42 N | 088 15 18 W |
| Pinten H373 Dam | Dam | 488 | Lincoln | 45 29 18 N | 089 29 54 W |
| Pixley Dam | Dam | 442 | Price | 45 52 49 N | 090 30 43 W |
| Pixley WP61 Dam | Dam | 434 | Price | 45 52 48 N | 090 30 43 W |
| Plain Honey Creek 2 3WR1225 Dam | Dam | 267 | Sauk | 43 18 30 N | 090 05 06 W |
| Plain Honey Creek 3 3WR175 Dam | Dam | 273 | Sauk | 43 21 18 N | 090 05 06 W |
| Plain Honey Creek 4 3WR175 Dam | Dam | 268 | Sauk | 43 21 24 N | 090 04 18 W |
| Pluemer G8020 Dam | Dam | 256 | Grant | 42 52 36 N | 090 45 06 W |
| Plum Creek 12 E-4499 Dam | Dam | 238 | Pepin | 44 30 60 N | 092 04 55 W |
| Plum Creek 19 E4499 Dam | Dam | 241 | Pierce | 44 33 54 N | 092 08 19 W |
| Plum Creek 2 E4499 Dam | Dam | 271 | Pierce | 44 40 06 N | 092 12 25 W |
| Plum Creek 3 E4499 Dam | Dam | 280 | Pierce | 44 41 12 N | 092 11 25 W |
| Plymouth Dam | Dam | 253 | Sheboygan | 43 44 54 N | 087 58 18 W |
| Pokorney 3WR273 Dam | Dam | 259 | Juneau | 43 46 30 N | 089 55 24 W |
| Polk 3SD78806 Dam | Dam | 367 | Sauk | 43 36 36 N | 090 17 36 W |
| Poplar Dam | Dam | 301 | Douglas | 46 34 48 N | 091 47 37 W |
| Poplar River Number 1 H-119 Dam | Dam | 386 | Clark | 44 58 30 N | 090 34 18 W |
| Port Arthur Dam (historical) | Dam | 329 | Rusk | 45 25 45 N | 091 09 38 W |
| Port Edwards 1874C276 Dam | Dam | 289 | Wood | 44 20 60 N | 089 51 12 W |
| Port Wing 2WP954 Dam | Dam | 187 | Bayfield | 46 44 48 N | 091 29 07 W |