Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Trinity Lutheran Church | Church | 364 | Sawyer | 46 00 53 N | 091 28 34 W |
| Trinity Lutheran Church | Church | 222 | Sheboygan | 43 50 50 N | 087 49 52 W |
| Trinity Lutheran Church | Church | 212 | Sheboygan | 43 40 25 N | 087 45 25 W |
| Trinity Lutheran Church | Church | 194 | Sheboygan | 43 45 12 N | 087 42 50 W |
| Trinity Lutheran Church | Church | 231 | St. Croix | 44 58 58 N | 092 45 05 W |
| Trinity Lutheran Church | Church | 332 | Washburn | 45 49 43 N | 091 53 23 W |
| Trinity Lutheran Church | Church | 284 | Washington | 43 25 28 N | 088 11 07 W |
| Trinity Lutheran Church | Church | 251 | Waukesha | 43 00 53 N | 088 13 31 W |
| Trinity Lutheran Church | Church | 271 | Waupaca | 44 31 56 N | 088 49 21 W |
| Trinity Lutheran Church | Church | 232 | Winnebago | 44 12 08 N | 088 27 09 W |
| Trinity Lutheran Church | Church | 297 | Wood | 44 21 04 N | 089 51 41 W |
| Trinity Lutheran Grade School | School | 388 | Lincoln | 45 10 44 N | 089 42 28 W |
| Trinity Lutheran Grade School | School | 429 | Marathon | 45 02 05 N | 090 04 35 W |
| Trinity Lutheran Grade School | School | 211 | Outagamie | 44 16 60 N | 088 15 38 W |
| Trinity Lutheran Grade School | School | 251 | Ozaukee | 43 14 07 N | 088 02 40 W |
| Trinity Lutheran Grade School | School | 232 | Winnebago | 44 12 08 N | 088 27 08 W |
| Trinity Lutheran School | Church | 194 | Sheboygan | 43 45 12 N | 087 42 48 W |
| Trinity Lutheran School | School | 239 | Manitowoc | 44 02 12 N | 087 49 18 W |
| Trinity Lutheran School | School | 370 | Marathon | 44 57 31 N | 089 38 31 W |
| Trinity Lutheran School | School | 181 | Marinette | 45 05 34 N | 087 37 34 W |
| Trinity Lutheran School | School | 492 | Oneida | 45 53 26 N | 089 41 08 W |
| Trinity Lutheran School | School | 213 | Racine | 42 49 43 N | 087 53 43 W |
| Trinity Lutheran School | School | 190 | Racine | 42 44 50 N | 087 47 38 W |
| Trinity Lutheran School | School | 250 | Waukesha | 43 00 54 N | 088 13 31 W |
| Trinity Lutheran School (historical) | School | 279 | Waupaca | 44 31 55 N | 088 49 45 W |
| Trinity Luthern Church | Church | 383 | Washburn | 45 39 25 N | 091 32 59 W |
| Trinity Methodist Church | Church | 319 | Dodge | 43 35 16 N | 088 26 05 W |
| Trinity Methodist Church | Church | 187 | Milwaukee | 42 59 42 N | 087 53 37 W |
| Trinity Presbyterian Church | Church | 270 | Calumet | 44 01 58 N | 088 09 48 W |
| Trinity Presbyterian Church | Church | 210 | Milwaukee | 43 04 47 N | 087 57 59 W |
| Trinity Reformed Church | Church | 280 | Dodge | 43 37 34 N | 088 43 44 W |
| Trinity Rest Cemetery | Cemetery | 296 | Jackson | 44 22 45 N | 091 00 33 W |
| Trinity School | School | 257 | Calumet | 44 06 34 N | 088 05 41 W |
| Trinity School | School | 329 | Dodge | 43 23 05 N | 088 25 52 W |
| Trinity School | School | 216 | Racine | 42 45 46 N | 087 59 05 W |
| Trinity School | School | 223 | Sheboygan | 43 50 51 N | 087 49 58 W |
| Trinity School | School | 263 | Washington | 43 21 08 N | 088 06 01 W |
| Trinity School | School | 230 | Winnebago | 44 10 54 N | 088 27 34 W |
| Trinity School (historical) | School | 419 | Marathon | 45 00 05 N | 089 32 16 W |
| Trinity United Church of Christ | Church | 248 | Columbia | 43 32 28 N | 089 28 04 W |
| Trinity United Methodist Church | Church | 259 | Chippewa | 44 56 04 N | 091 23 43 W |
| Trinity United Methodist Church | Church | 282 | Dodge | 43 27 44 N | 088 50 18 W |
| Trinity United Methodist Church | Church | 205 | Douglas | 46 40 06 N | 092 06 09 W |
| Trinity United Methodist Church | Church | 230 | Richland | 43 20 05 N | 090 22 53 W |
| Trinity United Methodist Church | Church | 222 | Trempealeau | 44 15 19 N | 091 30 25 W |
| Trinity-Saint Lukes Lutheran Grade School | School | 254 | Jefferson | 43 11 16 N | 088 43 13 W |
| Trintiy Episcopal Church | Church | 271 | Sauk | 43 28 23 N | 089 44 31 W |
| Trip Rapids | Rapids | 299 | Menominee | 45 03 20 N | 088 39 05 W |
| Triple D Airport | Airport | 383 | St. Croix | 44 59 60 N | 092 17 01 W |
| Triple Lakes | Lake | 350 | Chippewa | 45 14 42 N | 091 22 12 W |
| Tripoli | Populated Place | 469 | Lincoln | 45 33 19 N | 089 59 39 W |
| Tripoli Elementary School | School | 466 | Lincoln | 45 33 17 N | 090 00 17 W |
| Tripoli Golf Club | Locale | 229 | Milwaukee | 43 09 10 N | 087 57 58 W |
| Tripoli Temple | Church | 210 | Milwaukee | 43 02 21 N | 087 57 07 W |
| Tripp Hall | Building | 264 | Dane | 43 04 41 N | 089 24 39 W |
| Tripp Lake | Lake | 391 | Sawyer | 45 54 06 N | 091 32 13 W |
| Tripp Lake | Reservoir | 250 | Walworth | 42 49 46 N | 088 43 30 W |
| Tripp Lake 12.0 | Reservoir | 254 | Walworth | 42 49 48 N | 088 43 30 W |
| Tripp Memorial Library and Museum | Building | 238 | Sauk | 43 17 29 N | 089 43 17 W |
| Tripp Townhall | Building | 291 | Bayfield | 46 37 09 N | 091 23 38 W |
| Trippe Lake Park | Park | 251 | Walworth | 42 49 43 N | 088 43 25 W |
| Tripple Hill School (historical) | School | 354 | Pierce | 44 43 56 N | 092 11 07 W |
| Trippville | Populated Place | 326 | Vernon | 43 42 33 N | 090 24 15 W |
| Trippville Valley | Valley | | Vernon | 43 42 03 N | 090 23 07 W |
| Tristate Fair Grounds | Park | 205 | Douglas | 46 40 48 N | 092 06 04 W |
| Trondjem Church (historical) | Church | 375 | Clark | 44 47 06 N | 090 34 42 W |
| Troste Lookout Tower | Tower | 535 | Vilas | 46 15 06 N | 089 54 31 W |
| Trostel Lake | Lake | 506 | Vilas | 46 16 10 N | 089 54 38 W |
| Trotier School (historical) | School | 493 | Oneida | 45 36 27 N | 089 23 14 W |
| Trotter Branch | Stream | | Lafayette | 42 38 58 N | 089 51 53 W |
| Troubled Waters School (historical) | School | 296 | Eau Claire | 44 44 32 N | 091 04 28 W |
| Trout Brook | Stream | | Ashland | 46 25 16 N | 090 46 46 W |
| Trout Brook | Stream | | Lafayette | 42 34 42 N | 090 01 33 W |
| Trout Brook Farm | Locale | 253 | Richland | 43 20 37 N | 090 14 46 W |
| Trout Brook School (historical) | School | 294 | St. Croix | 44 56 07 N | 092 31 29 W |
| Trout Brook Stock Farm | Locale | 223 | Richland | 43 17 16 N | 090 38 27 W |
| Trout Creek | Stream | | Adams | 43 43 20 N | 089 49 23 W |
| Trout Creek | Stream | | Brown | 44 32 04 N | 088 07 39 W |
| Trout Creek | Stream | | Buffalo | 44 22 03 N | 091 53 40 W |
| Trout Creek | Stream | | Chippewa | 44 55 24 N | 091 27 16 W |
| Trout Creek | Stream | | Crawford | 43 24 23 N | 090 46 11 W |
| Trout Creek | Stream | | Dunn | 45 05 46 N | 091 43 15 W |
| Trout Creek | Stream | | Iowa | 43 04 36 N | 089 58 26 W |
| Trout Creek | Stream | | Lincoln | 45 32 15 N | 089 33 56 W |
| Trout Creek | Stream | | Marinette | 45 03 26 N | 087 44 57 W |
| Trout Creek | Stream | | Oneida | 45 36 59 N | 089 37 06 W |
| Trout Creek | Stream | | Trempealeau | 44 34 05 N | 091 26 51 W |
| Trout Creek School (historical) | School | 207 | Brown | 44 32 19 N | 088 09 01 W |
| Trout Creek School (historical) | School | 248 | Buffalo | 44 24 56 N | 091 54 47 W |
| Trout Creek School (historical) | School | 277 | Chippewa | 44 56 12 N | 091 28 47 W |
| Trout Creek School (historical) | School | 323 | Chippewa | 45 11 46 N | 091 26 21 W |
| Trout Creek School (historical) | School | 272 | Crawford | 43 24 35 N | 090 42 54 W |
| Trout Creek School (historical) | School | 321 | Dunn | 45 05 15 N | 091 41 34 W |
| Trout Lake | Lake | 468 | Ashland | 46 07 55 N | 090 31 51 W |
| Trout Lake | Lake | 342 | Bayfield | 46 29 28 N | 091 22 31 W |
| Trout Lake | Lake | 298 | Marinette | 45 26 57 N | 088 08 43 W |
| Trout Lake | Lake | 383 | Marinette | 45 35 45 N | 088 17 46 W |
| Trout Lake | Lake | 382 | Oconto | 45 14 27 N | 088 37 43 W |
| Trout Lake | Lake | 427 | Sawyer | 46 01 34 N | 091 07 42 W |
| Trout Lake | Lake | 491 | Vilas | 46 02 35 N | 089 40 15 W |
| Trout Lake | Reservoir | 264 | Juneau | 43 40 46 N | 089 50 55 W |
| Trout Lake | Reservoir | 268 | Walworth | 42 38 19 N | 088 45 54 W |
| Trout Lake (historical) | Lake | 429 | Langlade | 45 05 26 N | 089 05 19 W |
| Trout Lake 4 | Reservoir | 263 | Juneau | 43 40 48 N | 089 50 54 W |
| Trout Lake Dam | Dam | 264 | Juneau | 43 40 46 N | 089 50 55 W |
| Trout Point | Cape | 191 | Ashland | 46 58 06 N | 090 31 45 W |
| Trout River | Stream | | Vilas | 46 06 23 N | 089 49 53 W |
| Trout Run | Stream | | Jackson | 44 11 16 N | 090 53 59 W |
| Trout Run Church | Church | 256 | Jackson | 44 13 30 N | 090 56 48 W |
| Trout Run Creek | Stream | | Trempealeau | 44 13 06 N | 091 34 21 W |