Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Marsh Creek | Stream | | Price | 45 24 14 N | 090 36 43 W |
| Marsh Creek | Stream | | Rock | 42 43 18 N | 089 03 10 W |
| Marsh Lake | Lake | 230 | Marinette | 45 08 05 N | 088 08 23 W |
| Marsh Lake | Lake | 267 | Menominee | 45 01 35 N | 088 31 13 W |
| Marsh Lake | Lake | 363 | Polk | 45 18 40 N | 092 11 57 W |
| Marsh Lake | Lake | 347 | Polk | 45 38 16 N | 092 18 29 W |
| Marsh Lake | Lake | 325 | Rusk | 45 19 35 N | 091 16 32 W |
| Marsh Lake | Lake | 517 | Vilas | 46 09 02 N | 089 13 37 W |
| Marsh Lake 0.28 | Reservoir | 234 | Marinette | 45 07 60 N | 088 08 18 W |
| Marsh Lake Dam | Dam | 234 | Marinette | 45 07 60 N | 088 08 18 W |
| Marsh Number 10 Creek | Stream | | Forest | 45 41 03 N | 088 43 24 W |
| Marsh Number Ten | Swamp | 467 | Forest | 45 41 53 N | 088 43 34 W |
| Marsh Valley | Valley | | Dane | 43 10 35 N | 089 46 38 W |
| Marsh Woods Park | Park | 260 | Dane | 43 00 15 N | 089 17 19 W |
| Marsh-Miller Lake | Reservoir | 311 | Chippewa | 45 08 28 N | 091 23 35 W |
| Marsh-Miller Lake 16 | Reservoir | 313 | Chippewa | 45 08 24 N | 091 23 37 W |
| Marshall | Populated Place | 268 | Dane | 43 10 06 N | 089 04 00 W |
| Marshall Center School (historical) | School | 348 | Rusk | 45 19 54 N | 090 59 15 W |
| Marshall Creek | Stream | | Richland | 43 25 40 N | 090 27 19 W |
| Marshall Dam | Dam | 260 | Dane | 43 10 06 N | 089 03 36 W |
| Marshall Elementary School | School | 268 | Dane | 43 09 56 N | 089 04 05 W |
| Marshall Elementary School | School | 236 | Rock | 42 40 40 N | 089 01 03 W |
| Marshall High School | School | 270 | Dane | 43 09 53 N | 089 04 17 W |
| Marshall Hill School (historical) | School | 447 | Marathon | 45 02 18 N | 089 37 06 W |
| Marshall Lake | Lake | 501 | Forest | 45 41 02 N | 088 54 00 W |
| Marshall Lake | Lake | 515 | Vilas | 46 05 34 N | 089 21 07 W |
| Marshall Millpond 72 | Reservoir | 260 | Dane | 43 10 06 N | 089 03 36 W |
| Marshall Park | Park | 266 | Dane | 43 05 33 N | 089 29 01 W |
| Marshall School (historical) | School | 258 | Fond du Lac | 43 43 44 N | 088 25 17 W |
| Marshall Scott Hall | Building | 289 | Fond du Lac | 43 50 32 N | 088 50 41 W |
| Marshall United Methodist Church | Church | 269 | Dane | 43 09 57 N | 089 04 07 W |
| Marshall's Point State Natural Area | Park | | Door | 45 08 42 N | 087 02 04 W |
| Marshfield | Populated Place | 391 | Wood | 44 40 08 N | 090 10 18 W |
| Marshfield City Hall | Building | 389 | Wood | 44 39 55 N | 090 10 24 W |
| Marshfield Clinic | Hospital | 384 | Wood | 44 39 42 N | 090 10 40 W |
| Marshfield Clinic - Indianhead Center | Hospital | 346 | Barron | 45 30 47 N | 091 44 01 W |
| Marshfield Clinic Family Center | Hospital | 348 | Barron | 45 30 32 N | 091 44 15 W |
| Marshfield High School | School | 369 | Wood | 44 40 16 N | 090 09 18 W |
| Marshfield Junior High School | School | 388 | Wood | 44 39 30 N | 090 09 54 W |
| Marshfield Municipal Airport | Airport | 381 | Wood | 44 38 12 N | 090 11 21 W |
| Marshfield Post Office | Post Office | 391 | Wood | 44 39 59 N | 090 10 35 W |
| Marshfield Public Library | Building | 390 | Wood | 44 39 55 N | 090 10 18 W |
| Marshland | Populated Place | 207 | Buffalo | 44 04 25 N | 091 33 18 W |
| Marshland School (historical) | School | 234 | Buffalo | 44 05 12 N | 091 33 39 W |
| Martel Lake | Lake | 394 | Polk | 45 32 53 N | 092 11 21 W |
| Martell | Populated Place | 309 | Pierce | 44 49 47 N | 092 23 52 W |
| Martell Lutheran Cemetery | Cemetery | 323 | Pierce | 44 49 55 N | 092 24 29 W |
| Martell Methodist Cemetery | Cemetery | 323 | Pierce | 44 49 46 N | 092 24 37 W |
| Martha Lake | Lake | 483 | Iron | 46 10 24 N | 090 01 52 W |
| Martha Lake | Reservoir | 290 | Trempealeau | 44 34 35 N | 091 13 27 W |
| Martha Lake 34 | Reservoir | 290 | Trempealeau | 44 34 36 N | 091 13 25 W |
| Martha Washington Home for Girls | Building | 213 | Milwaukee | 43 02 28 N | 087 59 29 W |
| Martin Branch | Stream | | Grant | 42 52 27 N | 090 48 17 W |
| Martin Cemetery | Cemetery | 481 | Florence | 45 57 01 N | 088 39 18 W |
| Martin Cemetery | Cemetery | 262 | Green | 42 30 40 N | 089 47 55 W |
| Martin Church | Church | 338 | Chippewa | 45 11 33 N | 091 06 28 W |
| Martin Creek | Stream | | Florence | 45 46 16 N | 088 39 08 W |
| Martin Creek | Stream | | Iowa | 42 59 16 N | 090 14 27 W |
| Martin Fierro Airport | Airport | 302 | Grant | 42 47 60 N | 090 34 18 W |
| Martin Hanson G963 10 Dam | Dam | 433 | Ashland | 46 19 60 N | 090 47 07 W |
| Martin Luther Childrens Home | Building | 267 | Dane | 42 56 13 N | 089 11 47 W |
| Martin Luther Evangelical Lutheran Church | Church | 232 | Winnebago | 44 02 08 N | 088 33 28 W |
| Martin Luther Evangelical Lutheran School | School | 232 | Winnebago | 44 02 07 N | 088 33 30 W |
| Martin Luther High School | School | 232 | Milwaukee | 42 56 57 N | 088 00 37 W |
| Martin Luther King Community House | Building | 204 | Milwaukee | 43 02 02 N | 087 57 21 W |
| Martin Luther Latvian Church | Church | 235 | Fond du Lac | 43 45 51 N | 088 26 24 W |
| Martin Luther Preparatory School | School | 197 | Crawford | 43 01 56 N | 091 08 32 W |
| Martin Marsh | Swamp | 290 | Jackson | 44 19 52 N | 090 32 57 W |
| Martin School | School | 203 | Brown | 44 29 23 N | 087 57 48 W |
| Martins Aerodrome | Airport | 247 | Brown | 44 25 10 N | 087 55 00 W |
| Martins Hill School (historical) | School | 463 | Price | 45 36 31 N | 090 31 21 W |
| Martinsville | Populated Place | 352 | Dane | 43 10 49 N | 089 35 24 W |
| Martintown | Populated Place | 247 | Green | 42 30 30 N | 089 48 02 W |
| Martinville Creek | Stream | | Grant | 42 55 23 N | 090 30 12 W |
| Martinville School | School | 325 | Grant | 42 54 36 N | 090 27 45 W |
| Martinville School (historical) | School | 211 | Kewaunee | 44 36 11 N | 087 44 37 W |
| Marty Lake | Lake | 486 | Iron | 45 59 31 N | 090 08 49 W |
| Martyrs Cemetery | Cemetery | 293 | Jackson | 44 21 05 N | 090 20 23 W |
| Marxville | Populated Place | 274 | Dane | 43 11 28 N | 089 39 35 W |
| Mary Creek | Stream | | Oconto | 45 15 08 N | 088 40 41 W |
| Mary Hill | Summit | 326 | Fond du Lac | 43 47 12 N | 088 21 58 W |
| Mary Jane Lake | Lake | 324 | Chippewa | 45 09 54 N | 091 21 33 W |
| Mary Lake | Lake | 415 | Langlade | 45 17 32 N | 088 41 02 W |
| Mary Park | Park | 357 | Oconto | 45 20 39 N | 088 26 51 W |
| Mary Park | Park | 299 | St. Croix | 45 07 36 N | 092 32 01 W |
| Mary Queen of Heaven Catholic Church | Church | 228 | Milwaukee | 43 00 07 N | 088 02 38 W |
| Mary Queen of Heaven School | School | 235 | Milwaukee | 43 00 07 N | 088 02 23 W |
| Mary Roundtree Evans Athletic Field | Park | 256 | Sauk | 43 28 03 N | 089 45 08 W |
| Maryland Avenue School | School | 202 | Milwaukee | 43 03 44 N | 087 52 57 W |
| Marys Cemetery | Cemetery | 292 | Dodge | 43 31 52 N | 088 51 58 W |
| Marytown | Populated Place | 291 | Fond du Lac | 43 54 49 N | 088 12 08 W |
| Mascoutin Golf Club | Locale | 244 | Green Lake | 43 56 41 N | 088 57 50 W |
| Mashek Creek | Stream | | Kewaunee | 44 30 05 N | 087 29 00 W |
| Mashuda Residence Hall | Building | 209 | Milwaukee | 43 02 21 N | 087 56 12 W |
| Maslowski Park | Park | 184 | Ashland | 46 35 01 N | 090 55 19 W |
| Mason | Populated Place | 288 | Bayfield | 46 26 07 N | 091 03 36 W |
| Mason Cemetery | Cemetery | 303 | Bayfield | 46 26 25 N | 091 03 20 W |
| Mason Coulee | Valley | | Trempealeau | 44 09 46 N | 091 19 38 W |
| Mason Creek | Stream | | Sawyer | 45 48 26 N | 090 43 32 W |
| Mason Creek | Stream | | Washington | 43 09 35 N | 088 22 55 W |
| Mason Lake | Lake | 430 | Sawyer | 45 48 58 N | 090 41 59 W |
| Mason Lake | Reservoir | 244 | Adams | 43 39 13 N | 089 35 13 W |
| Mason Lake 37 | Reservoir | 246 | Marquette | 43 39 06 N | 089 35 30 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 |
| Masonic Cemetery | Cemetery | 257 | Lafayette | 42 32 22 N | 090 20 35 W |
| Masseyville Bridge | Bridge | 187 | Grant | 42 40 38 N | 090 45 26 W |
| Math-Aire Field | Airport | 290 | Dane | 43 15 28 N | 089 03 53 W |
| Mather | Populated Place | 293 | Juneau | 44 08 34 N | 090 18 31 W |
| Mather Heights Park | Park | 181 | Brown | 44 32 18 N | 088 02 22 W |