Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Our Saviors Lutheran Church | Church | 295 | Waupaca | 44 30 23 N | 089 07 34 W |
| Our Saviors Lutheran Church | Church | 231 | Winnebago | 44 10 27 N | 088 27 54 W |
| Our Saviors Lutheran Church | Church | 232 | Winnebago | 44 02 26 N | 088 32 41 W |
| Our Saviors Lutheran Church (historical) | Church | 385 | Lincoln | 45 10 53 N | 089 41 55 W |
| Our Saviors Mission Chapel (historical) | Church | 293 | Monroe | 43 59 04 N | 090 30 05 W |
| Our Saviors United Methodist Church | Church | 244 | Buffalo | 44 34 08 N | 091 40 14 W |
| Our Saviour Church | Church | 501 | Lincoln | 45 30 30 N | 089 26 51 W |
| Our Saviour Lutheran Church | Church | 184 | Brown | 44 30 07 N | 087 58 43 W |
| Our Saviours Cemetery | Cemetery | 390 | Vernon | 43 40 05 N | 090 51 10 W |
| Our Saviours Evangelical Lutheran Church | Church | 233 | Fond du Lac | 43 46 09 N | 088 26 49 W |
| Our Saviours Lutheran Cemetery | Cemetery | 424 | Taylor | 45 06 12 N | 090 26 41 W |
| Our Saviours Lutheran Church | Church | 267 | Brown | 44 20 38 N | 087 49 23 W |
| Our Saviours Lutheran Church | Church | 259 | Chippewa | 44 56 16 N | 091 23 26 W |
| Our Saviours Lutheran Church | Church | 337 | Chippewa | 45 09 58 N | 091 08 41 W |
| Our Saviours Lutheran Church | Church | 339 | Chippewa | 44 57 46 N | 090 56 08 W |
| Our Saviours Lutheran Church | Church | 356 | Clark | 44 46 14 N | 090 35 58 W |
| Our Saviours Lutheran Church | Church | 263 | Eau Claire | 44 48 46 N | 091 28 58 W |
| Our Saviours Lutheran Church | Church | 226 | La Crosse | 43 54 02 N | 091 04 51 W |
| Our Saviours Lutheran Church | Church | 385 | Lincoln | 45 10 56 N | 089 41 55 W |
| Our Saviours Lutheran Church | Church | 193 | Sheboygan | 43 43 40 N | 087 42 57 W |
| Our Saviours Lutheran Church | Church | 394 | Vernon | 43 39 06 N | 090 51 32 W |
| Our Saviours School | School | 363 | Marathon | 44 56 29 N | 089 38 35 W |
| Our Saviours United Church of Christ | Church | 287 | Fond du Lac | 43 50 42 N | 088 49 59 W |
| Our Shepherd United Church | Church | 219 | Sheboygan | 43 49 51 N | 087 49 20 W |
| Ourtown | Populated Place | 210 | Sheboygan | 43 41 50 N | 087 49 16 W |
| Outagamie County | Civil | 251 | Outagamie | 44 25 00 N | 088 28 00 W |
| Outagamie County Airport | Airport | 268 | Outagamie | 44 15 26 N | 088 31 09 W |
| Outagamie County Courthouse | Building | 239 | Outagamie | 44 15 31 N | 088 24 41 W |
| Outagamie County Hospital | Hospital | 239 | Outagamie | 44 16 37 N | 088 27 33 W |
| Outagamie State Wildlife Area | Park | 233 | Outagamie | 44 30 15 N | 088 34 56 W |
| Outer Bar | Bar | 228 | Winnebago | 44 10 55 N | 088 25 12 W |
| Outer Island | Island | 230 | Ashland | 47 02 07 N | 090 25 52 W |
| Outer Island Light | Locale | 185 | Ashland | 47 04 36 N | 090 24 59 W |
| Outer Island Shoal | Bar | 184 | Ashland | 47 05 24 N | 090 24 50 W |
| Outer Shoal | Bar | 176 | Door | 45 14 02 N | 086 57 46 W |
| Outlet Bay | Bay | 485 | Oneida | 45 31 27 N | 089 12 13 W |
| Outlet Bay | Bay | 512 | Vilas | 46 07 20 N | 089 08 44 W |
| Outlet Creek | Stream | | Forest | 45 29 54 N | 088 54 31 W |
| Outlet School (historical) | School | 253 | Winnebago | 43 56 58 N | 088 46 26 W |
| Overby Lake | Lake | 366 | Bayfield | 46 22 05 N | 091 14 47 W |
| Oviatt House | Building | 234 | Winnebago | 44 01 38 N | 088 33 05 W |
| Owego Cemetery | Cemetery | 247 | Shawano | 44 35 43 N | 088 14 59 W |
| Owen | Populated Place | 379 | Clark | 44 56 55 N | 090 33 51 W |
| Owen City Dam | Dam | 378 | Clark | 44 56 54 N | 090 34 00 W |
| Owen Memorial Park | Park | 430 | Columbia | 43 27 11 N | 089 34 44 W |
| Owen Park | Park | 302 | Dane | 43 04 17 N | 089 29 07 W |
| Owen Park | Park | 235 | Eau Claire | 44 48 14 N | 091 29 59 W |
| Owen Pond 5 | Reservoir | 378 | Clark | 44 56 54 N | 090 34 00 W |
| Owen-Withee Airport | Airport | 386 | Clark | 44 56 60 N | 090 36 00 W |
| Owen-Withee High School | School | 384 | Clark | 44 56 58 N | 090 34 45 W |
| Owens Rock | Pillar | 317 | Adams | 44 12 16 N | 089 39 29 W |
| Owens Valley | Valley | | Buffalo | 44 30 51 N | 091 53 18 W |
| Owl Creek | Stream | | Wood | 44 23 05 N | 090 06 51 W |
| Owl Head | Summit | 203 | Buffalo | 44 08 57 N | 091 44 36 W |
| Owl Lake | Lake | 298 | Burnett | 45 48 52 N | 092 16 30 W |
| Owl Lake | Lake | 500 | Iron | 46 16 53 N | 089 58 27 W |
| Owls Head Hill | Summit | 318 | Sauk | 43 23 36 N | 089 36 10 W |
| Ox Creek | Stream | | Marquette | 43 46 20 N | 089 25 27 W |
| Ox Creek | Stream | | Sauk | 43 36 40 N | 090 09 10 W |
| Ox Lake | Lake | 320 | Polk | 45 22 02 N | 092 27 02 W |
| Oxbo | Populated Place | 418 | Sawyer | 45 51 46 N | 090 42 16 W |
| Oxbo Creek | Stream | | Lincoln | 45 11 45 N | 089 26 57 W |
| Oxbo Lake | Lake | 422 | Price | 45 52 29 N | 090 40 29 W |
| Oxbow Cemetery | Cemetery | 238 | Jackson | 44 05 07 N | 091 00 34 W |
| Oxbow Lake | Lake | 488 | Iron | 46 12 48 N | 090 02 36 W |
| Oxbow Lake | Lake | 510 | Vilas | 46 14 37 N | 089 41 11 W |
| Oxbow Pond | Lake | 261 | Jackson | 44 22 28 N | 090 42 21 W |
| Oxbow Rapids | Rapids | 409 | Langlade | 45 13 14 N | 088 48 07 W |
| Oxbow Rapids Upper Wolf River State Natural Area | Park | 45 | Langlade | 45 13 13 N | 088 48 15 W |
| Oxbow School (historical) | School | 218 | Jackson | 44 05 22 N | 091 00 13 W |
| Oxford | Populated Place | 269 | Marquette | 43 46 53 N | 089 34 21 W |
| Oxford Dam | Dam | 258 | Marquette | 43 46 54 N | 089 34 36 W |
| Oxford Elementary School | School | 266 | Marquette | 43 46 48 N | 089 34 18 W |
| Oxford Lake | Lake | 252 | Marquette | 43 46 31 N | 089 33 47 W |
| Oxford School (historical) | School | 318 | Richland | 43 18 23 N | 090 27 02 W |
| Ozaukee Airport | Airport | 241 | Ozaukee | 43 25 17 N | 087 53 20 W |
| Ozaukee Country Club | Locale | 204 | Ozaukee | 43 13 04 N | 087 58 09 W |
| Ozaukee County | Civil | 235 | Ozaukee | 43 23 00 N | 087 57 00 W |
| Ozaukee County Courthouse | Building | 186 | Ozaukee | 43 23 18 N | 087 52 16 W |
| Ozaukee County Jail | Building | 186 | Ozaukee | 43 23 18 N | 087 52 19 W |
| Ozaukee High School | School | 255 | Ozaukee | 43 28 36 N | 087 56 34 W |
| P J Jacobs Junior High School | School | 333 | Portage | 44 31 27 N | 089 33 49 W |
| Paasch Lake | Lake | 233 | Kenosha | 42 30 47 N | 088 03 00 W |
| Pabst Dam | Dam | 259 | Walworth | 42 49 42 N | 088 29 12 W |
| Pabst Field | Airport | 270 | Waukesha | 43 04 25 N | 088 27 32 W |
| Pabst Lake 5 | Reservoir | 259 | Walworth | 42 49 42 N | 088 29 12 W |
| Pabst Theater | Building | 181 | Milwaukee | 43 02 28 N | 087 54 36 W |
| Pacawa Park | Park | 331 | Portage | 44 26 57 N | 089 31 28 W |
| Pace School (historical) | School | 267 | Buffalo | 44 33 37 N | 091 34 40 W |
| Pacelli High School | School | 332 | Portage | 44 31 33 N | 089 34 31 W |
| Pacific Cemetery | Cemetery | 249 | Columbia | 43 30 02 N | 089 24 35 W |
| Pacific School | School | 248 | Columbia | 43 29 27 N | 089 22 32 W |
| Packard | Populated Place | 210 | Marinette | 45 21 17 N | 087 41 39 W |
| Packard Creek | Stream | | Shawano | 44 52 11 N | 089 10 11 W |
| Packard Plaza Shopping Center | Locale | 214 | Milwaukee | 42 56 29 N | 087 51 31 W |
| Packwaukee | Populated Place | 238 | Marquette | 43 45 48 N | 089 27 30 W |
| Packwaukee Island | Island | 235 | Marquette | 43 42 19 N | 089 26 01 W |
| Pacwawong Lake | Lake | 383 | Sawyer | 46 09 04 N | 091 20 26 W |
| Pacwawong Spring | Spring | 383 | Sawyer | 46 08 13 N | 091 20 23 W |
| Paddock Field | Airport | 283 | Walworth | 42 44 00 N | 088 33 45 W |
| Paddock Lake | Lake | 240 | Kenosha | 42 34 29 N | 088 06 01 W |
| Paddock Lake | Populated Place | 249 | Kenosha | 42 34 39 N | 088 06 18 W |
| Paddock Lake School | School | 232 | Kenosha | 42 34 05 N | 088 05 07 W |
| Padus | Populated Place | 484 | Forest | 45 29 35 N | 088 39 51 W |
| Padus Lookout Tower | Tower | 514 | Forest | 45 29 42 N | 088 39 07 W |
| Page Creek | Stream | | Marquette | 43 45 41 N | 089 26 25 W |
| Page Creek Marsh State Natural Area | Park | 44 | Marquette | 43 45 40 N | 089 25 10 W |
| Pages Slough | Bay | 228 | Winnebago | 44 11 16 N | 088 48 49 W |
| Paine Art Center and Arboretum | Building | 232 | Winnebago | 44 02 05 N | 088 33 27 W |
| Paine Lumber Company Historic District | Park | 230 | Winnebago | 44 01 60 N | 088 33 34 W |