Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Long Lake Park | Park | 355 | Polk | 45 27 16 N | 092 31 24 W |
| Long Lake Picnic Area | Locale | 335 | Bayfield | 46 39 40 N | 091 02 53 W |
| Long Lake Public Access | Locale | 257 | Manitowoc | 44 08 42 N | 088 02 01 W |
| Long Lake Recreation Area | Park | 319 | Fond du Lac | 43 39 47 N | 088 09 53 W |
| Long Lake School (historical) | School | 329 | Chippewa | 45 15 15 N | 091 24 50 W |
| Long Lake School (historical) | School | 256 | Manitowoc | 44 07 53 N | 088 01 20 W |
| Long Lake School (historical) | School | 446 | Price | 45 42 07 N | 090 26 44 W |
| Long Lake Townhall | Building | 391 | Washburn | 45 41 31 N | 091 43 40 W |
| Long Mile Lookout Tower | Tower | 492 | Bayfield | 46 17 59 N | 091 03 39 W |
| Long Nebagamon Rapids | Rapids | 295 | Douglas | 46 31 52 N | 091 36 18 W |
| Long Pine School (historical) | School | 367 | Rusk | 45 36 37 N | 091 15 02 W |
| Long Point | Cape | 270 | Walworth | 42 46 35 N | 088 34 04 W |
| Long Point | Island | 228 | Winnebago | 43 54 01 N | 088 27 02 W |
| Long Point Reef | Bar | 228 | Winnebago | 43 55 54 N | 088 26 32 W |
| Long Pond | Lake | 301 | St. Croix | 45 05 29 N | 092 30 42 W |
| Long Riffles | Rapids | 197 | Douglas | 46 43 26 N | 091 35 57 W |
| Long School (historical) | School | 369 | Wood | 44 35 02 N | 090 08 27 W |
| Long Slide Falls | Falls | 275 | Marinette | 45 40 60 N | 087 56 00 W |
| Long Slide Falls County Park | Park | 281 | Marinette | 45 41 08 N | 087 56 00 W |
| Long Slough | Gut | 184 | Grant | 42 41 16 N | 090 55 59 W |
| Long Tail Point | Cape | 178 | Brown | 44 35 12 N | 087 58 49 W |
| Long Trade Lake | Lake | 296 | Polk | 45 37 50 N | 092 35 59 W |
| Long Trade Lake 45 | Reservoir | 301 | Polk | 45 37 60 N | 092 35 31 W |
| Long Valley | Valley | | Iowa | 42 53 10 N | 089 56 41 W |
| Long Valley Cemetery | Cemetery | 326 | Iowa | 42 54 03 N | 089 55 58 W |
| Long Valley Creek | Stream | | Iowa | 42 52 57 N | 089 56 43 W |
| Long-On-Deerskin 1909c361 Dam | Dam | 517 | Vilas | 46 02 42 N | 089 02 36 W |
| Longfellow Elementary School | School | 267 | Eau Claire | 44 49 10 N | 091 29 27 W |
| Longfellow Elementary School | School | 369 | Marathon | 44 57 13 N | 089 37 19 W |
| Longfellow Elementary School | School | 212 | Milwaukee | 43 00 15 N | 087 59 16 W |
| Longfellow Elementary School | School | 196 | Milwaukee | 43 01 15 N | 087 56 23 W |
| Longfellow Elementary School | School | 179 | Sheboygan | 43 44 26 N | 087 42 51 W |
| Longfellow Junior High School | School | 229 | Milwaukee | 43 03 41 N | 088 00 22 W |
| Longfellow Middle School | School | 204 | La Crosse | 43 47 45 N | 091 13 39 W |
| Longfellow School | School | 260 | Fond du Lac | 43 45 32 N | 088 32 34 W |
| Longfellow School | School | 230 | Winnebago | 44 01 18 N | 088 31 28 W |
| Longfellow School (historical) | School | 373 | Barron | 45 21 34 N | 092 00 44 W |
| Longfellow School (historical) | School | 257 | Calumet | 44 11 27 N | 088 08 39 W |
| Longfellow School (historical) | School | 265 | Dane | 43 03 53 N | 089 24 12 W |
| Longfellow School (historical) | School | 457 | Langlade | 45 10 58 N | 089 12 35 W |
| Longfellow School (historical) | School | 292 | Sheboygan | 43 34 18 N | 088 04 16 W |
| Longview School (historical) | School | 299 | Chippewa | 44 52 18 N | 091 35 49 W |
| Longview School (historical) | School | 284 | Fond du Lac | 43 40 53 N | 088 44 25 W |
| Longwood | Populated Place | 379 | Clark | 44 53 13 N | 090 35 53 W |
| Longwood Cemetery | Cemetery | 374 | Clark | 44 55 30 N | 090 37 10 W |
| Lookout | Populated Place | 264 | Buffalo | 44 27 30 N | 091 34 46 W |
| Lookout Lutheran Church | Church | 264 | Buffalo | 44 27 31 N | 091 34 49 W |
| Lookout Mountain | Summit | 586 | Lincoln | 45 24 03 N | 089 28 57 W |
| Lookout School (historical) | School | 276 | Buffalo | 44 27 02 N | 091 34 13 W |
| Lookout Tower | Tower | 397 | Clark | 44 43 18 N | 090 45 06 W |
| Lookout Valley | Valley | | Buffalo | 44 27 36 N | 091 34 33 W |
| Loomis | Populated Place | 212 | Marinette | 45 11 33 N | 087 53 57 W |
| Loon Creek | Stream | | Burnett | 46 00 33 N | 092 21 18 W |
| Loon Creek | Stream | | Menominee | 44 49 20 N | 088 29 15 W |
| Loon Island | Island | 422 | Sawyer | 46 04 40 N | 091 06 60 W |
| Loon Lake | Lake | 373 | Ashland | 46 21 01 N | 090 38 47 W |
| Loon Lake | Lake | 373 | Barron | 45 28 11 N | 092 07 43 W |
| Loon Lake | Lake | 337 | Bayfield | 46 34 14 N | 091 18 37 W |
| Loon Lake | Lake | 328 | Chippewa | 45 14 47 N | 091 28 01 W |
| Loon Lake | Lake | 311 | Douglas | 46 10 37 N | 091 58 11 W |
| Loon Lake | Lake | 352 | Douglas | 46 22 42 N | 091 33 45 W |
| Loon Lake | Lake | 385 | Florence | 45 53 13 N | 088 18 43 W |
| Loon Lake | Lake | 473 | Langlade | 45 23 18 N | 089 05 40 W |
| Loon Lake | Lake | 476 | Oneida | 45 35 51 N | 089 28 32 W |
| Loon Lake | Lake | 363 | Polk | 45 31 35 N | 092 16 13 W |
| Loon Lake | Lake | 245 | Shawano | 44 50 03 N | 088 30 37 W |
| Loon Lake | Lake | 497 | Vilas | 45 53 38 N | 089 14 11 W |
| Loon Lake | Lake | 406 | Washburn | 45 41 52 N | 091 36 57 W |
| Loon Lake | Lake | 405 | Washburn | 45 42 54 N | 091 38 19 W |
| Loon Lake | Lake | 309 | Washburn | 45 55 43 N | 091 58 03 W |
| Loon Lake | Lake | 351 | Washburn | 45 58 06 N | 091 35 01 W |
| Loon Lake | Lake | 329 | Washburn | 46 09 27 N | 091 41 32 W |
| Loon Lake | Reservoir | 299 | Burnett | 45 58 59 N | 092 10 31 W |
| Loon Lake 2WP344 Dam | Dam | 300 | Burnett | 45 58 60 N | 092 10 31 W |
| Loon Lake State Wildlife Area | Park | 375 | Barron | 45 28 34 N | 092 08 21 W |
| Loon Lake Woods State Natural Area | Park | 45 | Barron | 45 29 04 N | 092 07 53 W |
| Loon Rapids | Rapids | 322 | Oconto | 45 13 19 N | 088 28 56 W |
| Loper Cemetery | Cemetery | 287 | Fond du Lac | 43 52 52 N | 088 49 18 W |
| Loper Creek | Stream | | Eau Claire | 44 49 00 N | 090 57 16 W |
| Lorain Church | Church | 351 | Polk | 45 42 44 N | 092 14 17 W |
| Lord Cemetery | Cemetery | 351 | Waushara | 44 10 53 N | 089 22 42 W |
| Lord Creek | Stream | | Douglas | 46 16 28 N | 091 54 39 W |
| Lord of Love Lutheran Church | Church | 290 | Dane | 43 15 11 N | 089 20 37 W |
| Loreta | Populated Place | 356 | Sauk | 43 20 44 N | 090 06 26 W |
| Loreto Cemetery | Cemetery | 271 | Manitowoc | 43 59 60 N | 087 55 40 W |
| Loretta | Populated Place | 441 | Sawyer | 45 53 08 N | 090 51 11 W |
| Loretta Cemetery | Cemetery | 450 | Sawyer | 45 53 20 N | 090 50 33 W |
| Loretta Lake | Reservoir | 423 | Sawyer | 45 53 18 N | 090 52 46 W |
| Loretta Smith H1097 Dam | Dam | 326 | Clark | 44 31 36 N | 090 25 12 W |
| Lorimar Estates | Populated Place | 247 | Racine | 42 42 41 N | 088 07 38 W |
| Lorraine Lake | Lake | 485 | Oneida | 45 41 50 N | 089 34 18 W |
| Lost Canoe Lake | Lake | 501 | Vilas | 46 04 30 N | 089 35 41 W |
| Lost Canyon | Valley | | Sauk | 43 35 38 N | 089 46 50 W |
| Lost Channel | Channel | 189 | Crawford | 43 16 01 N | 091 03 29 W |
| Lost Creek | Stream | | Iron | 46 04 56 N | 089 58 39 W |
| Lost Creek | Stream | | Langlade | 45 24 08 N | 089 02 41 W |
| Lost Creek | Stream | | Oneida | 45 44 50 N | 089 19 34 W |
| Lost Creek | Stream | | Pepin | 44 26 58 N | 092 11 14 W |
| Lost Creek | Stream | | Pierce | 44 41 49 N | 092 19 50 W |
| Lost Creek | Stream | | Portage | 44 32 25 N | 089 30 56 W |
| Lost Creek | Stream | | Portage | 44 39 13 N | 089 27 55 W |
| Lost Creek | Stream | | Vilas | 45 56 38 N | 089 30 55 W |
| Lost Creek 3 D-31.10 Dam | Dam | 274 | Pepin | 44 29 24 N | 092 09 49 W |
| Lost Creek 4 D 31.10 Dam | Dam | 273 | Pepin | 44 29 54 N | 092 10 01 W |
| Lost Creek 5 D 31.10 Dam | Dam | 256 | Pepin | 44 29 30 N | 092 10 13 W |
| Lost Creek Bog State Natural Area | Park | | Bayfield | 46 51 17 N | 091 07 50 W |
| Lost Creek Cemetery | Cemetery | 325 | Pierce | 44 43 29 N | 092 21 28 W |
| Lost Creek Golf Course | Locale | 183 | Door | 44 52 03 N | 087 26 44 W |
| Lost Creek Number One | Stream | | Bayfield | 46 51 35 N | 091 08 13 W |
| Lost Creek Number Three | Stream | | Bayfield | 46 51 07 N | 091 08 20 W |