Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Lutz Park | Park | 228 | Outagamie | 44 14 58 N | 088 25 21 W |
| Lutzke Lakes | Lake | 265 | Manitowoc | 44 00 08 N | 087 51 35 W |
| Luxemburg | Populated Place | 244 | Kewaunee | 44 32 19 N | 087 42 14 W |
| Luxemburg Creek | Stream | | Kewaunee | 44 33 49 N | 087 40 36 W |
| Luxemburg-Casco Elementary School | School | 244 | Kewaunee | 44 32 53 N | 087 42 08 W |
| Luxemburg-Casco High School | School | 245 | Kewaunee | 44 32 47 N | 087 42 06 W |
| Luxemburg-Casco Middle School | School | 226 | Kewaunee | 44 33 02 N | 087 37 07 W |
| Lyceum Hall | Building | 257 | Sheboygan | 43 44 54 N | 087 58 41 W |
| Lydell School | School | 194 | Milwaukee | 43 06 44 N | 087 54 43 W |
| Lydia Cemetery | Cemetery | 342 | Grant | 42 49 42 N | 090 26 15 W |
| Lydon Lake | Lake | 355 | Douglas | 46 30 02 N | 091 43 03 W |
| Lydon Valley Creek | Stream | | Monroe | 43 47 44 N | 090 22 21 W |
| Lyga Valley | Valley | | Trempealeau | 44 22 42 N | 091 30 39 W |
| Lykens | Populated Place | 332 | Polk | 45 25 28 N | 092 28 09 W |
| Lykens Lake | Lake | 342 | Polk | 45 25 24 N | 092 26 60 W |
| Lyle Lake | Lake | 470 | Oneida | 45 39 27 N | 089 36 52 W |
| Lyle-Harter-Matter County Park | Park | 183 | Door | 45 00 47 N | 087 09 52 W |
| Lyman Bridge Public Access | Park | 291 | Burnett | 45 46 20 N | 092 18 01 W |
| Lyman Lake | Lake | 360 | Douglas | 46 27 24 N | 091 58 58 W |
| Lyman Lake | Lake | 313 | Waushara | 44 06 60 N | 089 24 35 W |
| Lyman Marsh | Swamp | 298 | Wood | 44 22 51 N | 090 16 26 W |
| Lyman School | School | 204 | Sheboygan | 43 45 04 N | 087 44 24 W |
| Lymantown | Populated Place | 461 | Price | 45 56 03 N | 090 27 10 W |
| Lynch Branch | Stream | | Iowa | 42 54 21 N | 090 03 31 W |
| Lynch Creek | Stream | | Sawyer | 46 05 46 N | 091 06 18 W |
| Lynch Creek 5 G31.3 Dam | Dam | 436 | Sawyer | 46 07 60 N | 091 05 07 W |
| Lynch Creek Flowage | Reservoir | 435 | Sawyer | 46 07 60 N | 091 05 07 W |
| Lynch Creek Number 5 Waterfowl Area | Park | 428 | Sawyer | 46 08 01 N | 091 04 41 W |
| Lynch Lake | Lake | 425 | Sawyer | 46 06 45 N | 091 05 37 W |
| Lynch School (historical) | School | 271 | Brown | 44 23 59 N | 087 47 28 W |
| Lyndale Farm | Locale | 237 | Richland | 43 18 45 N | 090 31 21 W |
| Lyndale School (historical) | School | 269 | Dunn | 44 52 46 N | 091 50 04 W |
| Lyndhurst | Populated Place | 290 | Shawano | 44 50 31 N | 088 48 45 W |
| Lyndon Cemetery | Cemetery | 277 | Sheboygan | 43 38 45 N | 087 56 23 W |
| Lyndon Creek | Stream | | Juneau | 43 43 12 N | 089 50 33 W |
| Lyndon Dale | Populated Place | 274 | Dodge | 43 34 38 N | 088 55 50 W |
| Lyndon Mitchell School (historical) | School | 286 | Sheboygan | 43 41 20 N | 088 00 09 W |
| Lyndon Station | Populated Place | 274 | Juneau | 43 42 44 N | 089 53 58 W |
| Lyndon Station Elementary School | School | 271 | Juneau | 43 42 50 N | 089 53 51 W |
| Lynn | Populated Place | 353 | Clark | 44 34 57 N | 090 24 35 W |
| Lynn Cemetery | Cemetery | 369 | Clark | 44 34 54 N | 090 23 26 W |
| Lynn Creek | Stream | | Wood | 44 16 20 N | 089 54 50 W |
| Lynn Lake | Lake | 489 | Oneida | 45 45 47 N | 089 22 57 W |
| Lynn School (historical) | School | 310 | Vernon | 43 28 02 N | 090 53 27 W |
| Lynwood School (historical) | School | 261 | Waupaca | 44 15 35 N | 089 02 49 W |
| Lynx Lake | Lake | 493 | Vilas | 45 56 55 N | 089 13 41 W |
| Lynx Lake | Lake | 518 | Vilas | 46 11 55 N | 089 40 27 W |
| Lynxville | Populated Place | 194 | Crawford | 43 14 47 N | 091 03 22 W |
| Lynxville Elementary School | School | 213 | Crawford | 43 14 53 N | 091 02 59 W |
| Lyon Park | Park | 302 | Wood | 44 23 04 N | 089 50 18 W |
| Lyon Valley | Valley | | Monroe | 43 50 10 N | 090 45 30 W |
| Lyons | Populated Place | 244 | Walworth | 42 39 04 N | 088 21 30 W |
| Lyons Cemetery | Cemetery | 302 | Walworth | 42 45 05 N | 088 40 35 W |
| Lyons Center | School | 241 | Walworth | 42 38 48 N | 088 21 31 W |
| Lyons Creek | Stream | | Jackson | 44 28 07 N | 091 04 13 W |
| Lyons Park | Park | 225 | Milwaukee | 42 59 03 N | 087 59 02 W |
| Lyons School (historical) | School | 366 | Marathon | 44 50 40 N | 089 34 22 W |
| Lyons School (historical) | School | 362 | Vernon | 43 34 26 N | 090 41 58 W |
| Lysne School (historical) | School | 236 | Crawford | 43 20 01 N | 090 57 55 W |
| Lyster Church | Church | 250 | Buffalo | 44 28 54 N | 091 53 35 W |
| Lyster School (historical) | School | 354 | Vernon | 43 29 57 N | 090 48 49 W |
| Maas Field | Airport | 293 | Shawano | 44 49 10 N | 088 54 30 W |
| Mabel Lake | Lake | 516 | Vilas | 46 11 45 N | 089 37 53 W |
| Mabel Tainter Memorial Building | Building | 266 | Dunn | 44 52 36 N | 091 55 43 W |
| Mable Lake | Lake | 401 | Langlade | 45 08 47 N | 088 51 55 W |
| MacArthur Elementary School | School | 198 | Brown | 44 31 06 N | 088 05 22 W |
| MacArthur Elementary School | School | 268 | Washington | 43 13 39 N | 088 06 07 W |
| MacArthur School | School | 224 | Milwaukee | 42 59 14 N | 087 59 18 W |
| Macauley Creek | Stream | | Oconto | 45 11 56 N | 088 23 47 W |
| Macco Creek | Stream | | Kewaunee | 44 40 30 N | 087 44 21 W |
| MacDonald Lake | Lake | 358 | Rusk | 45 19 07 N | 091 28 34 W |
| MacDowell Elementary School | School | 205 | Milwaukee | 43 02 41 N | 087 56 04 W |
| Mace Cemetery | Cemetery | 299 | Dodge | 43 26 33 N | 088 33 19 W |
| MacGlacklin School (historical) | School | 361 | Portage | 44 36 12 N | 089 25 38 W |
| Machickanee Flowage | Reservoir | 185 | Oconto | 44 51 27 N | 088 03 12 W |
| Machickanee Flowage 770 | Reservoir | 191 | Oconto | 44 51 24 N | 088 03 18 W |
| Macintire Creek | Stream | | Marinette | 45 40 18 N | 088 16 38 W |
| Mack Lake | Lake | 318 | Washburn | 46 00 01 N | 091 54 01 W |
| Mack School (historical) | School | 385 | Clark | 44 42 47 N | 090 28 34 W |
| Mack State Wildlife Area | Park | 234 | Outagamie | 44 27 44 N | 088 30 44 W |
| Mack Valley | Valley | | Juneau | 43 45 01 N | 090 17 06 W |
| Mackay Creek | Stream | | Washburn | 45 54 36 N | 091 42 59 W |
| Mackay Springs | Lake | 353 | Washburn | 45 51 07 N | 091 39 06 W |
| Mackay Valley Church | Church | 357 | Washburn | 45 52 37 N | 091 38 33 W |
| Mackay Valley School (historical) | School | 357 | Washburn | 45 52 37 N | 091 38 33 W |
| Mackaysee Lake | Lake | 178 | Door | 45 11 33 N | 087 20 32 W |
| Mackeys Spur | Locale | 470 | Price | 45 23 43 N | 090 17 54 W |
| Mackford Prairie School | School | 294 | Green Lake | 43 40 36 N | 088 56 07 W |
| Mackford Prairie School (historical) | School | 294 | Green Lake | 43 39 19 N | 088 54 25 W |
| Mackford Union Cemetery | Cemetery | 299 | Green Lake | 43 40 38 N | 088 55 05 W |
| Mackie Lake | Lake | 351 | Polk | 45 37 06 N | 092 15 48 W |
| Mackville | Locale | 244 | Outagamie | 44 20 37 N | 088 26 06 W |
| Mackville | Populated Place | 248 | Outagamie | 44 20 37 N | 088 24 54 W |
| MacRae Lake | Lake | 391 | Washburn | 45 45 02 N | 091 36 24 W |
| Mad River | Stream | | Marquette | 43 45 56 N | 089 26 51 W |
| Madden Branch | Stream | | Lafayette | 42 37 42 N | 090 21 22 W |
| Madden Lakes | Lake | 248 | Marquette | 43 41 25 N | 089 20 28 W |
| Madden Point | Cape | 485 | Oneida | 45 52 01 N | 089 44 29 W |
| Madeline Island | Island | 199 | Ashland | 46 48 59 N | 090 41 21 W |
| Madeline Island Airport | Airport | 196 | Ashland | 46 47 25 N | 090 45 26 W |
| Madeline Island Golf Club | Locale | 189 | Ashland | 46 46 10 N | 090 46 45 W |
| Madeline Island Historical Museum | Building | 187 | Ashland | 46 46 48 N | 090 47 20 W |
| Madeline Island Public Library | Building | 193 | Ashland | 46 46 54 N | 090 47 12 W |
| Madeline Island Yacht Club | Locale | 184 | Ashland | 46 46 23 N | 090 46 54 W |
| Madeline Lake | Lake | 485 | Oneida | 45 53 43 N | 089 38 38 W |
| Madge | Populated Place | 393 | Washburn | 45 44 45 N | 091 43 26 W |
| Madge Townhall | Building | 406 | Washburn | 45 45 36 N | 091 43 29 W |
| Madison | Populated Place | 267 | Dane | 43 04 23 N | 089 24 04 W |
| Madison Area Technical College | School | 261 | Dane | 43 06 22 N | 089 21 25 W |
| Madison Area Technical College | School | 273 | Dane | 43 04 33 N | 089 23 13 W |