Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| McGrass Creek | Stream | | Oneida | 45 47 30 N | 089 57 38 W |
| McGrath Lake | Lake | 484 | Oneida | 45 47 26 N | 089 38 40 W |
| McGraw Hall | Building | 257 | Walworth | 42 50 12 N | 088 44 33 W |
| McGraw Lake | Lake | 308 | Burnett | 46 09 11 N | 092 10 22 W |
| McGregor Lake | Lake | 186 | Crawford | 43 02 08 N | 091 09 42 W |
| McGregor Point | Cape | 293 | Crawford | 43 19 30 N | 090 50 52 W |
| McGrew (historical) | Populated Place | 342 | Richland | 43 23 51 N | 090 29 02 W |
| McGrogan Creek | Stream | | Clark | 44 56 34 N | 090 50 42 W |
| McHenry Island | Island | 361 | Barron | 45 36 40 N | 091 34 44 W |
| McIlquham Lake | Lake | 437 | Price | 45 42 51 N | 090 30 09 W |
| McIver Camp | Locale | 508 | Iron | 46 17 32 N | 090 23 59 W |
| McKaskel Lake | Lake | 491 | Ashland | 46 03 42 N | 090 22 21 W |
| McKays Spur | Locale | 459 | Oneida | 45 37 44 N | 089 42 20 W |
| McKeith Lake | Lake | 287 | Polk | 45 33 58 N | 092 38 23 W |
| McKellar Park | Park | 249 | Lafayette | 42 48 34 N | 089 51 32 W |
| McKenna Creek | Stream | | Jackson | 44 16 49 N | 090 31 05 W |
| McKenzie Creek | Stream | | Polk | 45 40 35 N | 092 17 18 W |
| McKenzie Creek | Stream | | Taylor | 45 02 31 N | 090 38 25 W |
| McKenzie Creek | Stream | | Washburn | 45 58 35 N | 091 54 21 W |
| McKenzie Creek | Stream | | Washburn | 46 00 30 N | 092 00 15 W |
| McKenzie Creek State Public Fishery Area | Park | 315 | Washburn | 45 59 15 N | 091 52 39 W |
| McKenzie Creek State Public Hunting Grounds | Park | 330 | Polk | 45 39 40 N | 092 17 16 W |
| McKenzie Lake | Lake | 302 | Burnett | 45 55 11 N | 092 02 10 W |
| McKenzie Lake | Lake | 339 | Polk | 45 36 35 N | 092 18 14 W |
| McKenzie Lake Lookout Tower | Tower | 370 | Washburn | 45 55 35 N | 092 00 49 W |
| McKinley | Populated Place | 390 | Polk | 45 34 17 N | 092 10 36 W |
| McKinley Elementary School | School | 278 | Eau Claire | 44 49 44 N | 091 27 31 W |
| McKinley Elementary School | School | 193 | Kenosha | 42 35 06 N | 087 50 55 W |
| McKinley Elementary School | School | 332 | Portage | 44 30 26 N | 089 33 58 W |
| McKinley Junior High School | School | 192 | Kenosha | 42 34 59 N | 087 50 52 W |
| McKinley Lake | Lake | 517 | Forest | 45 55 26 N | 088 58 27 W |
| McKinley Lake | Lake | 312 | Washburn | 45 54 41 N | 091 55 17 W |
| McKinley Marina | Locale | 179 | Milwaukee | 43 03 07 N | 087 53 10 W |
| McKinley Marina South | Locale | 179 | Milwaukee | 43 03 02 N | 087 53 16 W |
| McKinley Middle School | School | 194 | Racine | 42 43 36 N | 087 48 41 W |
| McKinley Park | Park | 192 | Milwaukee | 43 03 15 N | 087 52 59 W |
| McKinley Playground | Park | 221 | Milwaukee | 43 01 17 N | 088 00 07 W |
| McKinley Public School (historical) | School | 233 | Waupaca | 44 23 37 N | 088 44 48 W |
| McKinley School | School | 198 | Manitowoc | 44 06 09 N | 087 39 40 W |
| McKinley School | School | 221 | Milwaukee | 43 01 16 N | 088 00 06 W |
| McKinley School | School | 208 | Milwaukee | 43 02 51 N | 087 56 17 W |
| McKinley School | School | 216 | Milwaukee | 43 03 46 N | 088 01 28 W |
| McKinley School | School | 248 | Ozaukee | 43 26 26 N | 087 56 25 W |
| McKinley School | School | 388 | Polk | 45 34 18 N | 092 11 15 W |
| McKinley School | School | 264 | Waukesha | 43 06 20 N | 088 29 38 W |
| McKinley School | School | 226 | Winnebago | 44 10 60 N | 088 28 22 W |
| McKinley School (historical) | School | 321 | Chippewa | 44 56 41 N | 091 05 07 W |
| McKinley School (historical) | School | 342 | Clark | 44 43 11 N | 090 45 38 W |
| McKinley School (historical) | School | 287 | Columbia | 43 27 27 N | 089 07 00 W |
| McKinley School (historical) | School | 372 | Florence | 45 44 26 N | 088 11 15 W |
| McKinley School (historical) | School | 232 | Fond du Lac | 43 48 22 N | 088 28 50 W |
| McKinley School (historical) | School | 248 | Kewaunee | 44 35 20 N | 087 40 03 W |
| McKinley School (historical) | School | 354 | Marathon | 44 43 43 N | 089 59 02 W |
| McKinley School (historical) | School | 187 | Marinette | 45 04 43 N | 087 39 54 W |
| McKinley School (historical) | School | 283 | St. Croix | 45 01 42 N | 092 43 53 W |
| Mckinley School (historical) | School | 315 | Wood | 44 18 48 N | 089 44 42 W |
| McKinley Townhall | Building | 389 | Polk | 45 34 20 N | 092 11 12 W |
| McKinley Valley | Valley | | La Crosse | 43 55 52 N | 091 03 53 W |
| McKinney Hollow | Valley | | Richland | 43 15 05 N | 090 37 20 W |
| McKinney Lake | Lake | 488 | Vilas | 46 07 43 N | 089 53 39 W |
| McLain Lake | Lake | 302 | Washburn | 46 02 52 N | 091 56 58 W |
| McLane Elementary School | School | 293 | Washington | 43 25 08 N | 088 11 14 W |
| McLaren Hall | Building | 207 | Milwaukee | 43 04 41 N | 087 52 47 W |
| McLaren Lake | Lake | 436 | Ashland | 46 08 27 N | 090 55 17 W |
| McLaughlin School (historical) | School | 325 | Grant | 43 03 17 N | 090 33 59 W |
| McLaughlins Subdivision (subdivision) | Populated Place | 241 | Waukesha | 42 50 57 N | 088 09 46 W |
| McLean Creek | Stream | | Waupaca | 44 17 22 N | 089 04 59 W |
| McLean Lake | Lake | 258 | Waupaca | 44 16 44 N | 089 06 13 W |
| McLenegan Elementary School | School | 247 | Rock | 42 32 34 N | 089 00 32 W |
| McLeod Lake | Lake | 502 | Vilas | 45 59 14 N | 089 21 01 W |
| McLery Cemetery | Cemetery | 266 | Jefferson | 42 55 56 N | 088 39 19 W |
| McManus Hoonch-Na-Shee-Kaw Airport | Airport | 282 | Dane | 42 55 53 N | 089 20 19 W |
| McManus Ridge | Ridge | 340 | Crawford | 43 23 31 N | 090 54 39 W |
| McMillan | Populated Place | 388 | Marathon | 44 44 32 N | 090 09 48 W |
| McMillan Marsh | Swamp | 386 | Marathon | 44 43 27 N | 090 12 21 W |
| McMillan Marsh State Public Hunting Grounds | Park | 386 | Marathon | 44 43 45 N | 090 12 17 W |
| McMillan School (historical) | School | 398 | Marathon | 44 43 43 N | 090 09 35 W |
| McMillian Hall | Building | 276 | Pierce | 44 51 11 N | 092 37 02 W |
| McMillian Memorial Library | Building | 310 | Wood | 44 23 17 N | 089 49 17 W |
| McMullen Hill | Summit | 322 | Sheboygan | 43 40 48 N | 088 08 29 W |
| McMullen Memorial County Park | Park | 307 | Monroe | 44 09 06 N | 090 31 14 W |
| McMynn School (historical) | School | 446 | Marathon | 45 03 37 N | 089 25 40 W |
| McNamar Lake | Lake | 454 | Taylor | 45 14 39 N | 090 22 06 W |
| McNaughton | Populated Place | 479 | Oneida | 45 43 57 N | 089 32 40 W |
| McNaughton Lake | Lake | 481 | Oneida | 45 44 55 N | 089 35 11 W |
| McNaughton State Camp | Locale | 495 | Oneida | 45 48 03 N | 089 37 56 W |
| McNeel Junior High School | School | 249 | Rock | 42 31 08 N | 089 04 19 W |
| McNeil Landing | Locale | 202 | Douglas | 46 42 17 N | 091 36 14 W |
| McNett E6379 Dam | Dam | 298 | Lafayette | 42 46 42 N | 090 17 30 W |
| McNott Island | Island | 428 | Sawyer | 46 05 09 N | 091 06 41 W |
| McNutt Lake | Lake | 483 | Oneida | 45 50 53 N | 089 43 26 W |
| McPeace Valley | Valley | | Green | 42 49 18 N | 089 51 20 W |
| McPeace Valley Creek | Stream | | Green | 42 49 45 N | 089 50 18 W |
| McPherson Branch | Stream | | Grant | 42 47 04 N | 090 37 35 W |
| McPherson Cemetery | Cemetery | 229 | Racine | 42 47 08 N | 088 00 25 W |
| McPherson School | School | 309 | Dane | 42 57 56 N | 089 37 19 W |
| McReynolds Cemetery | Cemetery | 335 | Grant | 42 49 29 N | 090 26 13 W |
| McVay Brook | Stream | | Marathon | 44 49 13 N | 089 15 12 W |
| McWeeney School (historical) | School | 231 | Buffalo | 44 16 32 N | 091 32 39 W |
| Mead 2WP862 Dam | Dam | 316 | Clark | 44 47 21 N | 090 46 22 W |
| Mead Conifer Bogs State Natural Area | Park | 45 | Portage | 44 40 40 N | 089 50 12 W |
| Mead Creek | Stream | | Iron | 46 19 30 N | 090 29 31 W |
| Mead Elementary School | School | 308 | Wood | 44 23 39 N | 089 50 37 W |
| Mead Field | Park | 307 | Wood | 44 23 32 N | 089 50 35 W |
| Mead Lake | Reservoir | 317 | Clark | 44 47 21 N | 090 46 22 W |
| Mead Lake 95 | Reservoir | 316 | Clark | 44 47 24 N | 090 46 19 W |
| Mead Park | Park | 331 | Portage | 44 31 23 N | 089 35 39 W |
| Mead Public Library | Building | 194 | Sheboygan | 43 45 09 N | 087 42 48 W |
| Meadow Brook | Stream | | Lincoln | 45 33 08 N | 090 01 04 W |
| Meadow Brook | Stream | | Marinette | 45 22 36 N | 088 06 03 W |