Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Matheson Memorial Library | Building | 314 | Walworth | 42 40 25 N | 088 32 36 W |
| Mathew Keenan Health Center | Hospital | 210 | Milwaukee | 43 04 38 N | 087 57 29 W |
| Mathey School (historical) | School | 446 | Taylor | 45 08 34 N | 090 17 30 W |
| Mathias Mitchell Public Square Main Street Historic District | Park | 332 | Portage | 44 31 25 N | 089 35 00 W |
| Mathis Church (historical) | Church | 291 | Marinette | 45 28 19 N | 088 03 58 W |
| Mathis Lake | Lake | 291 | Marinette | 45 28 34 N | 088 04 50 W |
| Mathison School | School | 244 | Winnebago | 44 11 19 N | 088 42 18 W |
| Mathy Lake | Lake | 343 | Rusk | 45 21 26 N | 091 22 47 W |
| Matott School (historical) | School | 330 | Chippewa | 45 03 32 N | 091 12 21 W |
| Matravers Landing Field (historical) | Airport | 221 | Oconto | 44 53 05 N | 088 07 17 W |
| Matsen Cemetery | Cemetery | 303 | Dane | 43 14 35 N | 089 24 09 W |
| Matson Airport | Airport | 278 | Dane | 42 54 49 N | 089 11 10 W |
| Matson Lake | Lake | 403 | Washburn | 45 43 43 N | 091 33 42 W |
| Matt Ochs Lake | Lake | 450 | Taylor | 45 13 12 N | 090 28 34 W |
| Matteson Creek | Stream | | Shawano | 44 40 23 N | 088 41 55 W |
| Matthew A Marvin Field House | Building | 233 | Rock | 42 30 20 N | 089 01 53 W |
| Matthews Lake | Lake | 302 | Washburn | 46 01 21 N | 091 57 23 W |
| Mattoon | Populated Place | 388 | Shawano | 45 00 15 N | 089 02 31 W |
| Mattoon Creek | Stream | | Langlade | 45 00 13 N | 089 01 56 W |
| Mattoon Swamp | Swamp | 424 | Shawano | 45 00 13 N | 089 11 20 W |
| Mattrich Lake | Lake | 248 | Marinette | 45 09 24 N | 088 09 41 W |
| Matz-Tagatz Cemetery | Cemetery | 251 | Marquette | 43 54 30 N | 089 18 19 W |
| Maud Lake | Lake | 485 | Oneida | 45 41 20 N | 089 33 52 W |
| Mauer Creek | Stream | | Taylor | 45 17 13 N | 090 37 20 W |
| Maule Coulee | Valley | | Trempealeau | 44 21 42 N | 091 23 19 W |
| Maule Coulee School (historical) | School | 264 | Trempealeau | 44 23 08 N | 091 22 46 W |
| Maunesha River | Stream | | Jefferson | 43 13 21 N | 088 56 28 W |
| Maurer Creek | Stream | | Taylor | 45 10 39 N | 090 30 19 W |
| Maurer Memorial Hall | Building | 235 | Rock | 42 30 25 N | 089 01 49 W |
| Mauston | Populated Place | 269 | Juneau | 43 47 50 N | 090 04 38 W |
| Mauston 1856C176 Dam | Dam | 264 | Juneau | 43 47 48 N | 090 04 12 W |
| Mauston Airport (historical) | Airport | 269 | Juneau | 43 46 13 N | 090 02 29 W |
| Mauston City Hall | Building | 265 | Juneau | 43 47 50 N | 090 04 26 W |
| Mauston Elementary School | School | 274 | Juneau | 43 47 47 N | 090 05 13 W |
| Mauston High School | School | 275 | Juneau | 43 47 18 N | 090 05 02 W |
| Mauston Middle School | School | 274 | Juneau | 43 47 18 N | 090 05 04 W |
| Mauston Post Office | Post Office | 266 | Juneau | 43 47 38 N | 090 04 13 W |
| Mauston Public Hospital (historical) | Hospital | 270 | Juneau | 43 47 46 N | 090 04 39 W |
| Mauston Public Library | Building | 268 | Juneau | 43 47 50 N | 090 04 34 W |
| Mauston-New Lisbon Union Airport | Airport | 274 | Juneau | 43 50 17 N | 090 08 12 W |
| Mauthe Lake | Lake | 296 | Fond du Lac | 43 36 09 N | 088 10 52 W |
| Mauthe Lake Recreation Area | Park | 297 | Fond du Lac | 43 36 02 N | 088 10 41 W |
| Maxon Cemetery | Cemetery | 321 | Washington | 43 20 42 N | 088 13 15 W |
| Maxon Hall | Building | 262 | Waukesha | 43 00 12 N | 088 13 44 W |
| Maxville | Populated Place | 236 | Buffalo | 44 31 54 N | 092 00 32 W |
| Maxville Bluff School (historical) | School | 379 | Buffalo | 44 34 02 N | 091 54 34 W |
| Maxville Cemetery | Cemetery | 236 | Buffalo | 44 32 08 N | 092 00 30 W |
| Maxville Prairie | Area | 235 | Buffalo | 44 31 51 N | 092 00 33 W |
| Maxville Prairie School (historical) | School | 235 | Buffalo | 44 31 54 N | 092 00 33 W |
| Maxwell Spring | Spring | 424 | Langlade | 45 06 44 N | 089 02 13 W |
| Maxwelton Country Club | Locale | 198 | Door | 45 02 36 N | 087 08 09 W |
| May Corner | Populated Place | 199 | Marinette | 45 02 57 N | 087 51 02 W |
| May Coulee | Valley | | Jackson | 44 27 07 N | 091 06 57 W |
| May Hall | Building | 276 | Pierce | 44 51 14 N | 092 37 39 W |
| May Lake | Lake | 507 | Forest | 45 58 48 N | 088 50 09 W |
| May Lake | Lake | 500 | Iron | 46 12 33 N | 090 05 25 W |
| May Ledges | Rapids | 243 | Douglas | 46 38 16 N | 091 35 48 W |
| May Swamp | Swamp | 186 | Door | 44 50 05 N | 087 29 35 W |
| Mayfair Mall Shopping Center | Locale | 221 | Milwaukee | 43 03 50 N | 088 02 41 W |
| Mayfair Park | Park | 269 | Dane | 43 06 52 N | 089 18 53 W |
| Mayfield | Populated Place | 286 | Washington | 43 19 45 N | 088 11 48 W |
| Mayfield Cemetery | Cemetery | 231 | Richland | 43 16 40 N | 090 22 48 W |
| Mayfield Cemetery | Cemetery | 298 | Washington | 43 20 03 N | 088 11 53 W |
| Mayflower Dairy Farm | Locale | 234 | Richland | 43 14 04 N | 090 12 40 W |
| Mayflower Lake | Lake | 496 | Forest | 45 30 22 N | 088 46 45 W |
| Mayflower Lake | Lake | 516 | Forest | 45 53 57 N | 088 57 10 W |
| Mayflower Lake | Lake | 394 | Marathon | 44 54 43 N | 089 15 14 W |
| Mayflower School (historical) | School | 346 | Chippewa | 45 14 56 N | 090 56 47 W |
| Mayflower School (historical) | School | 347 | Clark | 44 32 22 N | 090 24 03 W |
| Mayflower School (historical) | School | 463 | Langlade | 45 11 10 N | 089 08 53 W |
| Mayflower School (historical) | School | 279 | Monroe | 44 01 36 N | 090 21 10 W |
| Mayhews (historical) | Populated Place | 262 | Walworth | 42 45 47 N | 088 29 24 W |
| Mayking Creek | Stream | | Langlade | 45 04 35 N | 089 00 43 W |
| Mayking School (historical) | School | 431 | Langlade | 45 06 07 N | 089 00 44 W |
| Maynard School (historical) | School | 349 | Pierce | 44 45 41 N | 092 28 43 W |
| Mayo School (historical) | School | 504 | Vilas | 45 57 52 N | 089 13 03 W |
| Mays Rips Rapids | Rapids | 308 | Douglas | 46 27 32 N | 091 37 17 W |
| Mayville | Populated Place | 282 | Dodge | 43 29 39 N | 088 32 41 W |
| Mayville City Hall | Building | 277 | Dodge | 43 29 46 N | 088 32 38 W |
| Mayville Golf Club | Locale | 305 | Dodge | 43 29 32 N | 088 32 23 W |
| Mayville High School | School | 285 | Dodge | 43 30 16 N | 088 33 17 W |
| Mayville Ledge Beech-Maple Woods State Natural Area | Park | 345 | Dodge | 43 27 27 N | 088 32 23 W |
| Mayville Middle School | School | 285 | Dodge | 43 29 53 N | 088 32 46 W |
| Mayville Post Office | Post Office | 280 | Dodge | 43 29 45 N | 088 32 44 W |
| Mayville Public Library | Building | 280 | Dodge | 43 29 49 N | 088 32 42 W |
| Maywood Elementary School | School | 266 | Dane | 43 03 41 N | 089 20 23 W |
| Maywood Environmental Park | Park | 197 | Sheboygan | 43 46 51 N | 087 45 26 W |
| Maywood Park | Park | 258 | Dane | 43 03 35 N | 089 20 21 W |
| Mazomanie | Populated Place | 234 | Dane | 43 10 36 N | 089 47 41 W |
| Mazomanie 2WP881 Dam | Dam | 237 | Dane | 43 09 54 N | 089 46 48 W |
| Mazomanie Bottoms State Natural Area | Park | 225 | Dane | 43 12 46 N | 089 49 32 W |
| Mazomanie Elementary School | School | 233 | Dane | 43 10 41 N | 089 47 56 W |
| Mazomanie Oak Barrens State Natural Area | Park | 226 | Dane | 43 14 23 N | 089 44 25 W |
| Mazomanie State Wildlife Area | Park | 226 | Dane | 43 15 18 N | 089 43 57 W |
| Mazomanie United Methodist Church | Church | 233 | Dane | 43 10 40 N | 089 47 52 W |
| Mazy Lake | Lake | 479 | Oneida | 45 37 02 N | 089 33 05 W |
| Mc Clintock County Park | Park | 359 | Marinette | 45 28 37 N | 088 19 48 W |
| McAdam Branch | Stream | | Grant | 42 38 54 N | 090 34 44 W |
| McAllister | Populated Place | 211 | Marinette | 45 19 38 N | 087 43 16 W |
| McAllister Creek | Stream | | Marinette | 45 34 03 N | 087 49 07 W |
| McAllister Lake | Lake | 258 | Waupaca | 44 17 12 N | 089 06 33 W |
| McAllister Pond | Reservoir | 235 | Marinette | 45 34 31 N | 087 48 47 W |
| McAllister School | School | 209 | Manitowoc | 44 07 27 N | 087 42 35 W |
| McAllister School | School | 215 | Marinette | 45 18 44 N | 087 42 59 W |
| McArdle Cancer Laboratory | Building | 285 | Dane | 43 04 33 N | 089 24 32 W |
| McArthur Lake | Lake | 473 | Price | 45 54 55 N | 090 05 29 W |
| McArthur School (historical) | School | 403 | Marathon | 44 48 03 N | 090 10 13 W |
| McAskill Cemetery | Cemetery | 385 | Polk | 45 28 09 N | 092 34 47 W |
| McBoyle Dells Airport (historical) | Airport | 278 | Sauk | 43 34 60 N | 089 47 09 W |
| McCabe Lake | Lake | 484 | Oneida | 45 44 42 N | 089 27 51 W |