Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Island Number One Hundred Sixty-six | Island | 186 | Crawford | 43 07 00 N | 091 09 39 W |
| Island Number Seventy-one | Island | 198 | Buffalo | 44 03 58 N | 091 38 46 W |
| Island Number Sixty-three | Island | 201 | Buffalo | 44 06 43 N | 091 42 08 W |
| Island Number Two Hundred Eleven | Island | 184 | Grant | 42 38 42 N | 090 43 00 W |
| Island Number Two Hundred Five | Island | 185 | Grant | 42 39 33 N | 090 48 16 W |
| Island Number Two Hundred Nine | Island | 185 | Grant | 42 39 02 N | 090 45 24 W |
| Island Number Two Hundred One | Island | 185 | Grant | 42 40 22 N | 090 52 47 W |
| Island Number Two Hundred Seven | Island | 185 | Grant | 42 39 24 N | 090 47 31 W |
| Island Number Two Hundred Twelve | Island | 185 | Grant | 42 37 59 N | 090 41 50 W |
| Island Park | Island | 229 | Winnebago | 44 05 19 N | 088 28 54 W |
| Island Park | Park | 237 | Trempealeau | 44 21 44 N | 091 25 31 W |
| Island Park | Populated Place | 229 | Winnebago | 44 01 22 N | 088 48 08 W |
| Island Park Baptist Church | Church | 202 | La Crosse | 43 51 54 N | 091 16 11 W |
| Island School | School | 275 | Dodge | 43 30 14 N | 088 56 09 W |
| Island Swamp | Swamp | 520 | Forest | 45 44 33 N | 088 55 23 W |
| Island View Airport | Airport | 502 | Forest | 45 36 22 N | 089 01 17 W |
| Islandale | Island | 262 | Waukesha | 43 07 22 N | 088 30 51 W |
| Isle La Plume | Island | 199 | La Crosse | 43 47 35 N | 091 15 27 W |
| Isle of Ferns Park | Park | 357 | Marathon | 44 57 14 N | 089 38 00 W |
| Italian Christian Church | Church | 184 | Kenosha | 42 35 18 N | 087 49 28 W |
| Italian Hollow | Valley | | Vernon | 43 33 19 N | 091 13 40 W |
| Italian Workmens Club | Building | 260 | Dane | 43 04 03 N | 089 24 05 W |
| Itasca | Populated Place | 196 | Douglas | 46 40 29 N | 092 00 24 W |
| Itasca Presbyterian Church | Church | 197 | Douglas | 46 40 32 N | 092 00 27 W |
| Itasca Public School (historical) | School | 197 | Douglas | 46 40 32 N | 092 00 32 W |
| Ithaca | Populated Place | 227 | Richland | 43 20 27 N | 090 16 54 W |
| Iverson Park | Park | 326 | Portage | 44 31 12 N | 089 32 19 W |
| Iverson Ridge | Ridge | 347 | Crawford | 43 20 56 N | 090 52 13 W |
| Ives | Populated Place | 197 | Racine | 42 46 12 N | 087 48 19 W |
| Ives Grove | Populated Place | 240 | Racine | 42 43 45 N | 087 57 58 W |
| Ives Grove Golf Links | Locale | 240 | Racine | 42 43 33 N | 087 57 51 W |
| Ixonia | Populated Place | 264 | Jefferson | 43 08 38 N | 088 35 50 W |
| Ixonia Cemetery | Cemetery | 273 | Jefferson | 43 08 58 N | 088 38 51 W |
| Ixonia Elementary School | School | 266 | Jefferson | 43 08 55 N | 088 35 52 W |
| J A Kimberly Memorial Library | Building | 233 | Outagamie | 44 15 21 N | 088 23 14 W |
| J E Hamilton Community House | Building | 183 | Manitowoc | 44 08 56 N | 087 34 08 W |
| J H Morgan House | Building | 329 | Portage | 44 27 14 N | 089 32 29 W |
| J L Jensen House | Building | 332 | Portage | 44 31 07 N | 089 34 50 W |
| J M Storzer Physical Education Center | Building | 269 | Fond du Lac | 43 50 30 N | 088 51 07 W |
| J-3 Cub Field | Airport | 265 | Jefferson | 43 04 39 N | 088 39 46 W |
| Jack Creek | Stream | | Clark | 44 31 50 N | 090 35 34 W |
| Jack Green Creek | Stream | | St. Croix | 45 12 28 N | 092 15 08 W |
| Jack Island | Island | 180 | Door | 45 10 22 N | 087 15 57 W |
| Jack Lake | Lake | 501 | Langlade | 45 19 48 N | 089 05 52 W |
| Jack Oak Island | Island | 185 | Grant | 42 41 55 N | 090 57 48 W |
| Jack Oak Slough | Stream | | Grant | 42 41 21 N | 090 56 41 W |
| Jack Pine Lake | Lake | 347 | Douglas | 46 22 13 N | 091 36 30 W |
| Jack Pine Lookout Tower | Summit | 480 | Oneida | 45 40 48 N | 089 47 54 W |
| Jackknife Lake | Lake | 526 | Lincoln | 45 26 27 N | 089 30 30 W |
| Jackman Lake | Lake | 327 | Bayfield | 46 35 42 N | 091 22 54 W |
| Jackman Park | Park | 259 | Rock | 42 41 31 N | 088 59 09 W |
| Jackpine Knob Airport | Airport | 293 | Marinette | 45 35 09 N | 088 00 13 W |
| Jacks Lake | Lake | 336 | Chippewa | 45 16 55 N | 091 23 47 W |
| Jackson | Populated Place | 272 | Washington | 43 19 26 N | 088 10 00 W |
| Jackson Bluff | Cliff | 257 | Pierce | 44 37 11 N | 092 27 11 W |
| Jackson Cemetery | Cemetery | 312 | Burnett | 45 55 23 N | 092 13 42 W |
| Jackson Cemetery | Cemetery | 336 | Iowa | 42 51 02 N | 090 02 00 W |
| Jackson County | Civil | 311 | Jackson | 44 20 00 N | 090 52 01 W |
| Jackson County Airport (historical) | Airport | 262 | Jackson | 44 18 13 N | 090 48 18 W |
| Jackson County Courthouse | Building | 242 | Jackson | 44 17 44 N | 090 51 05 W |
| Jackson County Iron Mine | Mine | 306 | Jackson | 44 17 35 N | 090 43 31 W |
| Jackson Creek | Stream | | Bayfield | 46 15 22 N | 091 06 37 W |
| Jackson Creek | Stream | | Sheboygan | 43 45 57 N | 087 59 34 W |
| Jackson Creek | Stream | | Walworth | 42 38 26 N | 088 33 39 W |
| Jackson Creek | Stream | | Waupaca | 44 38 43 N | 089 11 11 W |
| Jackson Elementary School | School | 195 | Manitowoc | 44 06 40 N | 087 40 10 W |
| Jackson Elementary School | School | 333 | Portage | 44 30 48 N | 089 35 56 W |
| Jackson Elementary School | School | 256 | Rock | 42 38 43 N | 089 01 06 W |
| Jackson Elementary School | School | 201 | Sheboygan | 43 42 10 N | 087 44 26 W |
| Jackson Elementary School | School | 268 | Washington | 43 19 28 N | 088 09 41 W |
| Jackson Harbor | Bay | 176 | Door | 45 24 04 N | 086 51 05 W |
| Jackson Harbor Ridges State Natural Area | Park | | Door | 45 23 48 N | 086 51 06 W |
| Jackson Lake | Lake | 424 | Bayfield | 46 14 58 N | 091 06 59 W |
| Jackson Lake | Lake | 319 | Waupaca | 44 38 41 N | 089 09 44 W |
| Jackson Marsh State Natural Area | Park | 43 | Washington | 43 20 21 N | 088 06 48 W |
| Jackson Marsh State Wildlife Area | Park | 254 | Washington | 43 20 17 N | 088 07 20 W |
| Jackson Park | Park | 179 | Brown | 44 30 37 N | 088 00 45 W |
| Jackson Park | Park | 199 | Milwaukee | 42 59 42 N | 087 57 45 W |
| Jackson Plaza Shopping Center | Locale | 204 | La Crosse | 43 48 02 N | 091 13 43 W |
| Jackson Public School (historical) | School | 333 | Portage | 44 31 11 N | 089 35 40 W |
| Jackson School | Locale | 302 | Burnett | 45 55 25 N | 092 15 20 W |
| Jackson School | School | 193 | Brown | 44 30 41 N | 088 03 30 W |
| Jackson School | School | 339 | Iowa | 42 51 10 N | 090 02 05 W |
| Jackson School | School | 240 | Outagamie | 44 16 28 N | 088 24 12 W |
| Jackson School (historical) | School | 251 | Calumet | 44 11 54 N | 088 14 36 W |
| Jackson School (historical) | School | 263 | Dodge | 43 24 56 N | 088 54 32 W |
| Jackson School (historical) | School | 324 | Fond du Lac | 43 41 25 N | 088 18 01 W |
| Jackson School (historical) | School | 287 | Jackson | 44 16 47 N | 091 05 06 W |
| Jackson School (historical) | School | 457 | Marathon | 45 06 19 N | 089 44 49 W |
| Jackson School (historical) | School | 323 | Sauk | 43 37 24 N | 090 06 49 W |
| Jackson School (historical) | School | 419 | Sawyer | 46 02 27 N | 091 19 22 W |
| Jackson School (historical) | School | 506 | Vilas | 45 54 20 N | 089 25 01 W |
| Jackson School (historical) | School | 262 | Winnebago | 43 55 19 N | 088 38 14 W |
| Jackson Springs | Spring | 437 | Price | 45 47 12 N | 090 39 24 W |
| Jackson Townhall | Building | 315 | Burnett | 45 55 47 N | 092 13 05 W |
| Jacksonport | Populated Place | 180 | Door | 44 58 43 N | 087 11 08 W |
| Jacksonport Cemetery | Cemetery | 182 | Door | 44 59 43 N | 087 10 26 W |
| Jacksonville | Populated Place | 310 | Monroe | 43 57 07 N | 090 33 27 W |
| Jacksonville Pass | Gap | 365 | Monroe | 43 56 20 N | 090 36 20 W |
| Jacksonville School | School | 309 | Monroe | 43 57 09 N | 090 33 27 W |
| Jacksonville Valley | Valley | | Monroe | 43 57 26 N | 090 32 36 W |
| Jacob Shapiro Elementary School | School | 237 | Winnebago | 43 59 59 N | 088 33 51 W |
| Jacobson Lake | Lake | 328 | Barron | 45 19 45 N | 091 35 38 W |
| Jacques Lake | Lake | 365 | Sawyer | 45 40 31 N | 091 12 60 W |
| Jacquish Hollow | Valley | | Richland | 43 21 57 N | 090 15 56 W |
| Jader Creek | Stream | | Bayfield | 46 22 53 N | 091 11 26 W |
| Jag Lake | Lake | 494 | Vilas | 46 05 04 N | 089 43 22 W |
| Jahns Valley | Valley | | Buffalo | 44 19 52 N | 091 46 10 W |
| Jahns Valley School (historical) | School | 279 | Buffalo | 44 21 32 N | 091 42 58 W |
| Jambo Creek | Stream | | Manitowoc | 44 15 21 N | 087 39 41 W |