Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Lost Creek 5 D 31.10 Dam | Dam | 256 | Pepin | 44 29 30 N | 092 10 13 W |
| Lourie G9297 Dam | Dam | 291 | Crawford | 43 20 24 N | 090 46 06 W |
| Lowell Dam | Dam | 246 | Dodge | 43 20 24 N | 088 49 06 W |
| Lower Appleton Dam | Dam | 213 | Outagamie | 44 15 36 N | 088 23 24 W |
| Lower Balsam Lake Dam | Dam | 345 | Polk | 45 26 54 N | 092 27 01 W |
| Lower Clam Lake Dam | Dam | 427 | Sawyer | 46 08 24 N | 090 56 13 W |
| Lower Eau Claire Lake Dam | Dam | 348 | Douglas | 46 15 30 N | 091 34 25 W |
| Lower Hydro WP183 Dam | Dam | 444 | Price | 45 54 48 N | 090 26 55 W |
| Lower Kaukauna 2-Wp-381 Dam | Dam | 186 | Outagamie | 44 16 48 N | 088 15 18 W |
| Lower Kimball Lake Dam | Dam | 304 | Washburn | 46 06 48 N | 091 57 07 W |
| Lower Lake Nemahbin WP439 Dam | Dam | 267 | Waukesha | 43 03 24 N | 088 26 30 W |
| Lower Lost Lake 2WP936 Dam | Dam | 302 | Burnett | 46 01 06 N | 092 03 49 W |
| Lower Nine Mile Dam | Dam | 501 | Oneida | 45 53 36 N | 089 07 12 W |
| Lower North Wood County Park 2WP371 Dam | Dam | 329 | Wood | 44 30 42 N | 090 08 18 W |
| Lower Oconto Falls 1857c195 Dam | Dam | 210 | Oconto | 44 52 18 N | 088 08 36 W |
| Lower Steve Creek 2WP1332 Dam | Dam | 397 | Price | 45 23 54 N | 090 37 13 W |
| Lower Watertown 2WP81 Dam | Dam | 246 | Jefferson | 43 11 30 N | 088 43 30 W |
| Lower White River WP271 Dam | Dam | 249 | Waushara | 44 01 12 N | 089 14 54 W |
| Lucas Lake Dam | Dam | 303 | Washington | 43 24 40 N | 088 13 01 W |
| Ludden Lake 2WP1659 Dam | Dam | 280 | Iowa | 42 52 18 N | 090 12 00 W |
| Ludeman G924 Dam | Dam | 310 | Jackson | 44 19 48 N | 090 59 43 W |
| Lynch Creek 5 G31.3 Dam | Dam | 436 | Sawyer | 46 07 60 N | 091 05 07 W |
| Magruder G5279 Dam | Dam | 296 | Sauk | 43 37 06 N | 090 14 06 W |
| Manawa 1899C177 Dam | Dam | 245 | Waupaca | 44 27 60 N | 088 55 06 W |
| Manchester 1852C403 Dam | Dam | 267 | Green Lake | 43 41 24 N | 089 02 54 W |
| Maple Lake 2WP487 Dam | Dam | 497 | Oneida | 45 48 24 N | 089 09 48 W |
| Marantha Discipleship Center H1240 Dam | Dam | 333 | Jackson | 44 26 36 N | 091 05 07 W |
| Marengo 2WP85 Dam | Dam | 403 | Bayfield | 46 17 06 N | 090 57 49 W |
| Marion 2WP732 Dam | Dam | 259 | Waupaca | 44 40 23 N | 088 53 16 W |
| Marking H926 Dam | Dam | 283 | Sauk | 43 33 24 N | 089 54 24 W |
| Marsh Lake Dam | Dam | 234 | Marinette | 45 07 60 N | 088 08 18 W |
| Marshall Dam | Dam | 260 | Dane | 43 10 06 N | 089 03 36 W |
| Martin Hanson G963 10 Dam | Dam | 433 | Ashland | 46 19 60 N | 090 47 07 W |
| Mason Marcks Forsythe 1 3WC78817a Dam | Dam | 273 | Pepin | 44 31 42 N | 092 08 37 W |
| Mason Marcks Forsythe 2 3WC78817a Dam | Dam | 279 | Pepin | 44 31 24 N | 092 08 37 W |
| Mauston 1856C176 Dam | Dam | 264 | Juneau | 43 47 48 N | 090 04 12 W |
| Mazomanie 2WP881 Dam | Dam | 237 | Dane | 43 09 54 N | 089 46 48 W |
| McCoy G 9648 Dam | Dam | 259 | Iowa | 42 51 06 N | 089 52 00 W |
| McDill 2-WP-1579 Dam | Dam | 325 | Portage | 44 29 36 N | 089 33 10 W |
| McFadyen Dam | Dam | 512 | Vilas | 46 17 18 N | 089 55 01 W |
| McGinnis Lake 2WP2255 Dam | Dam | 289 | Adams | 43 50 26 N | 089 38 42 W |
| McNett E6379 Dam | Dam | 298 | Lafayette | 42 46 42 N | 090 17 30 W |
| Mead 2WP862 Dam | Dam | 316 | Clark | 44 47 21 N | 090 46 22 W |
| Meadow Valley Flowage 2WP395 Dam | Dam | 293 | Juneau | 44 13 18 N | 090 18 06 W |
| Meadow Valley Spillway 3 G12.759 Dam | Dam | 294 | Juneau | 44 13 12 N | 090 17 30 W |
| Meadow Valley Spillway 4 2WP395 Dam | Dam | 294 | Juneau | 44 13 18 N | 090 15 30 W |
| Meadow Valley Spillway 5 G12.759 Dam | Dam | 294 | Juneau | 44 13 18 N | 090 14 54 W |
| Meadow Valley Spillway 6 2WP395 Dam | Dam | 294 | Juneau | 44 13 42 N | 090 14 54 W |
| Meadow Valley Spillway 7 2WP395 Dam | Dam | 292 | Juneau | 44 13 42 N | 090 13 18 W |
| Mech G4583 Dam | Dam | 321 | Clark | 44 47 36 N | 090 43 55 W |
| Medford Dam | Dam | 428 | Taylor | 45 08 19 N | 090 20 52 W |
| Melrose Dam | Dam | 235 | Jackson | 44 07 60 N | 090 59 37 W |
| Menasha Genlaws Dam | Dam | 228 | Winnebago | 44 11 60 N | 088 26 48 W |
| Menasha Lock | Dam | 225 | Winnebago | 44 12 10 N | 088 27 38 W |
| Mendota Locks 2WP1286 Dam | Dam | 259 | Dane | 43 05 42 N | 089 22 12 W |
| Menomonie 2WP983 Dam | Dam | 248 | Dunn | 44 52 60 N | 091 55 43 W |
| Merillan Mills Dam | Dam | 276 | Jackson | 44 26 54 N | 090 50 31 W |
| Merrill 1874C118 Dam | Dam | 379 | Lincoln | 45 10 42 N | 089 41 12 W |
| Merton Rolling Mill E-4528 Dam | Dam | 289 | Waukesha | 43 09 00 N | 088 18 24 W |
| Metz Number 1 G9922 Dam | Dam | 289 | Lafayette | 42 33 54 N | 090 05 36 W |
| Metz Number 2 G9922 Dam | Dam | 298 | Lafayette | 42 33 48 N | 090 05 42 W |
| Meyer 1 G3582.1 Dam | Dam | 432 | Taylor | 45 11 18 N | 090 24 31 W |
| Meyer 2 G3582.1 Dam | Dam | 438 | Taylor | 45 11 42 N | 090 24 31 W |
| Meyer 4 G3582.1 Dam | Dam | 439 | Taylor | 45 11 42 N | 090 25 37 W |
| Meyer 5 G3582.1 Dam | Dam | 438 | Taylor | 45 11 42 N | 090 24 31 W |
| Meyer 6 E1355.1 Dam | Dam | 421 | Taylor | 45 10 30 N | 090 25 25 W |
| Middle Appleton WP-309 Dam | Dam | 219 | Outagamie | 44 15 30 N | 088 24 18 W |
| Middle Dam | Dam | 378 | Marinette | 45 39 30 N | 088 15 54 W |
| Middle Eau Claire Lake 2WP366 Dam | Dam | 344 | Bayfield | 46 17 06 N | 091 32 37 W |
| Mill Creek 10 D-31.11 Dam | Dam | 300 | Richland | 43 27 12 N | 090 33 54 W |
| Mill Creek 13a D-31.11 Dam | Dam | 262 | Richland | 43 22 54 N | 090 30 12 W |
| Mill Creek 13b D-31.11 Dam | Dam | 284 | Richland | 43 23 30 N | 090 29 48 W |
| Mill Creek 1b D-31.11 Dam | Dam | 252 | Richland | 43 21 60 N | 090 29 48 W |
| Mill Creek 22 D 31.11 Dam | Dam | 313 | Richland | 43 24 24 N | 090 36 42 W |
| Mill Creek 3 D-31.11 Dam | Dam | 248 | Richland | 43 19 60 N | 090 34 18 W |
| Mill Creek 9a D-31.11 Dam | Dam | 280 | Richland | 43 26 30 N | 090 34 36 W |
| Miller Dam | Dam | 383 | Taylor | 45 12 02 N | 090 42 38 W |
| Miller G877 19 Dam | Dam | 331 | Barron | 45 20 48 N | 091 59 55 W |
| Millhome WP396 Dam | Dam | 268 | Manitowoc | 43 53 42 N | 087 57 48 W |
| Millston Dam | Dam | 275 | Jackson | 44 11 18 N | 090 39 06 W |
| Milwaukee Dam | Dam | 182 | Milwaukee | 43 03 30 N | 087 53 42 W |
| Minerva 2WP503 Dam | Dam | 291 | Burnett | 45 59 60 N | 092 19 55 W |
| Minocqua 1909C361 Dam | Dam | 483 | Oneida | 45 52 36 N | 089 43 43 W |
| Minong Flowage 2WP252 Dam | Dam | 305 | Washburn | 46 07 12 N | 091 56 07 W |
| Miscauno Pond Dam | Dam | 251 | Marinette | 45 35 07 N | 087 53 18 W |
| Mishicot Dam | Dam | 182 | Manitowoc | 44 14 18 N | 087 38 30 W |
| Mlsna D 2592.2 Dam | Dam | 349 | Vernon | 43 42 42 N | 090 45 06 W |
| Monches Dam | Dam | 283 | Waukesha | 43 11 18 N | 088 20 30 W |
| Mondeaux Dam | Dam | 428 | Taylor | 45 19 60 N | 090 26 59 W |
| Mondeaux River 2WP262 Dam | Dam | 424 | Taylor | 45 19 60 N | 090 27 01 W |
| Monson Flowage G12.575 Dam | Dam | 369 | Taylor | 45 18 06 N | 090 51 12 W |
| Montello Dam | Dam | 235 | Marquette | 43 47 12 N | 089 19 36 W |
| Montello Granite Dam | Dam | 239 | Marquette | 43 47 36 N | 089 19 42 W |
| Monterey Dam | Dam | 268 | Waukesha | 43 10 18 N | 088 29 54 W |
| Monterey Laws1848 Dam | Dam | 232 | Rock | 42 40 12 N | 089 01 54 W |
| Moose Lake 1911 C640 Dam | Dam | 418 | Sawyer | 46 01 60 N | 091 04 31 W |
| Mosinee 1893C138 Dam | Dam | 347 | Marathon | 44 47 27 N | 089 41 46 W |
| Motl 1 G12 121 Dam | Dam | 441 | Langlade | 45 07 30 N | 089 22 30 W |
| Motl 2 G12 121 Dam | Dam | 444 | Langlade | 45 07 54 N | 089 21 54 W |
| Motl 3 G12 121 Dam | Dam | 445 | Langlade | 45 07 60 N | 089 21 24 W |
| Mott G7082 Dam | Dam | 278 | Richland | 43 24 42 N | 090 16 42 W |
| Mound Plant WP 224 Dam | Dam | 269 | St. Croix | 45 01 40 N | 092 38 54 W |
| Mount Horeb Dam | Dam | 306 | Dane | 43 01 18 N | 089 44 24 W |
| Mount Morris 3WR1972 Dam | Dam | 264 | Waushara | 44 06 48 N | 089 11 36 W |
| Moyle 2WP978 Dam | Dam | 484 | Price | 45 36 24 N | 090 13 37 W |
| Mravik E-7031 Dam | Dam | 460 | Taylor | 45 16 60 N | 089 59 36 W |
| Mud Creek D7777 Dam | Dam | 451 | Florence | 45 44 24 N | 088 27 30 W |
| Mukwonago Dam | Dam | 241 | Waukesha | 42 51 24 N | 088 19 48 W |
| Mullet Creek G12.473 Dam | Dam | 307 | Fond du Lac | 43 45 30 N | 088 10 30 W |
| Murphy Creek 3WR223 Dam | Dam | 207 | Marinette | 45 07 18 N | 088 05 42 W |