Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Taylor County Fairgrounds | Locale | 334 | Taylor | 40 39 30 N | 094 43 01 W |
| Taylor County Farm Cemetery | Cemetery | 380 | Taylor | 40 44 30 N | 094 40 22 W |
| Taylor County Historical Museum | Building | 344 | Taylor | 40 40 01 N | 094 43 17 W |
| Taylor County Home | Hospital | 382 | Taylor | 40 44 43 N | 094 40 22 W |
| Taylor County Sheriff Department | Building | 347 | Taylor | 40 40 05 N | 094 43 10 W |
| Taylor Elementary School | School | 224 | Linn | 41 58 12 N | 091 40 43 W |
| Taylor Hill | Locale | 308 | Grundy | 42 32 33 N | 092 39 16 W |
| Taylor Hill Post Office (historical) | Post Office | 305 | Grundy | 42 32 33 N | 092 39 01 W |
| Taylor Lakes | Lake | 186 | Allamakee | 43 11 00 N | 091 08 31 W |
| Taylor Park | Park | 166 | Muscatine | 41 24 46 N | 091 04 53 W |
| Taylor Park | Park | 292 | Tama | 42 11 26 N | 092 27 52 W |
| Taylor Pond Park | Park | 363 | Howard | 43 15 18 N | 092 06 56 W |
| Taylor Post Office (historical) | Post Office | 231 | Davis | 40 44 00 N | 092 17 32 W |
| Taylor Post Office (historical) | Post Office | 339 | Pottawattamie | 41 16 17 N | 095 31 12 W |
| Taylor School | School | 220 | Scott | 41 32 05 N | 090 35 10 W |
| Taylor Station Post Office (historical) | Post Office | 361 | Pottawattamie | 41 16 30 N | 095 32 14 W |
| Taylor's Ford Bridge | Bridge | 268 | Buchanan | 42 23 60 N | 091 48 44 W |
| Taylor's Grove Post Office (historical) | Post Office | 267 | Benton | 41 51 54 N | 092 00 21 W |
| Taylors Grove | Locale | 267 | Benton | 41 51 54 N | 092 00 21 W |
| Taylorsville | Populated Place | 368 | Fayette | 42 46 02 N | 091 38 49 W |
| Taylorsville Post Office (historical) | Post Office | 368 | Fayette | 42 46 02 N | 091 38 49 W |
| Taylorville Cemetery | Cemetery | 362 | Fayette | 42 46 10 N | 091 38 46 W |
| Teagarden Park | Park | 271 | Story | 41 59 27 N | 093 36 31 W |
| Teal Basins Waterfowl Production Area | Park | 386 | Cerro Gordo | 43 13 05 N | 093 26 31 W |
| Technology Inovation Center | Building | 232 | Johnson | 41 42 12 N | 091 36 05 W |
| Ted Dreier Building | Building | 230 | Jefferson | 41 01 01 N | 091 57 57 W |
| Tedrow Cemetery | Cemetery | 343 | Ringgold | 40 40 17 N | 094 07 34 W |
| Tedrow Cemetery | Cemetery | 227 | Van Buren | 40 51 00 N | 091 55 31 W |
| Teds Mobile Home Park | Populated Place | 214 | Scott | 41 32 15 N | 090 38 00 W |
| Teeds Grove | Populated Place | 212 | Clinton | 42 00 42 N | 090 14 51 W |
| Teeds Grove (historical) | Locale | 214 | Clinton | 42 00 45 N | 090 14 50 W |
| Teeds Grove Cemetery | Cemetery | 244 | Clinton | 42 00 11 N | 090 15 44 W |
| Teeds Grove Post Office (historical) | Post Office | 212 | Clinton | 42 00 42 N | 090 14 51 W |
| Teener Creek | Stream | | Washington | 41 30 15 N | 091 55 43 W |
| Teeple Creek | Stream | | Allamakee | 43 12 39 N | 091 29 43 W |
| Teeters Cemetery | Cemetery | 198 | Muscatine | 41 22 20 N | 091 18 01 W |
| Tegeler Pond | Lake | 287 | Delaware | 42 29 02 N | 091 08 31 W |
| Teleford Prairie Area | Area | 385 | Palo Alto | 43 03 50 N | 094 47 31 W |
| Templar Harbor | Bay | 427 | Dickinson | 43 27 15 N | 095 06 59 W |
| Templar Point | Cape | 427 | Dickinson | 43 27 25 N | 095 06 53 W |
| Temple Baptist Church | Church | 340 | Cerro Gordo | 43 08 23 N | 093 10 51 W |
| Temple Baptist Church | Church | 323 | Floyd | 43 03 50 N | 092 39 23 W |
| Temple Baptist Church | Church | 196 | Scott | 41 33 21 N | 090 34 09 W |
| Temple Beth El | Church | 195 | Dubuque | 42 29 51 N | 090 40 00 W |
| Temple Emanuel | Church | 211 | Scott | 41 31 54 N | 090 33 12 W |
| Temple Hill | Populated Place | 281 | Jones | 42 13 33 N | 090 58 35 W |
| Temple Hill Post Office (historical) | Post Office | 299 | Jones | 42 13 30 N | 090 57 08 W |
| Temple Israel | Church | 192 | Des Moines | 40 48 28 N | 091 06 38 W |
| Temple of Rest Assembly | Church | 268 | Polk | 41 32 47 N | 093 35 47 W |
| Templer Park | Park | 428 | Dickinson | 43 27 26 N | 095 07 00 W |
| Templeton | Locale | 439 | Carroll | 41 55 18 N | 094 56 41 W |
| Templeton | Populated Place | 439 | Carroll | 41 55 06 N | 094 56 34 W |
| Templeton City Hall | Building | 439 | Carroll | 41 55 06 N | 094 56 34 W |
| Templeton Post Office | Post Office | 439 | Carroll | 41 55 06 N | 094 56 34 W |
| Templo Glorioso Amanecer | Church | 377 | Woodbury | 42 28 47 N | 096 22 04 W |
| Ten Mile Creek | Stream | | Winneshiek | 43 20 09 N | 091 50 52 W |
| Ten Mile Creek Bridge | Bridge | 303 | Winneshiek | 43 20 16 N | 091 53 18 W |
| Ten Napel Brothers Incorporated Elevator | Locale | 434 | Sioux | 42 58 29 N | 096 19 06 W |
| Ten Sych Cemetery | Cemetery | 238 | Van Buren | 40 44 00 N | 092 04 31 W |
| Tenmile | Populated Place | 263 | Clinton | 41 56 44 N | 090 20 02 W |
| Tennant | Populated Place | 421 | Shelby | 41 35 37 N | 095 26 28 W |
| Tennant (historical) | Locale | 421 | Shelby | 41 35 44 N | 095 26 41 W |
| Tennant Methodist Church | Church | 423 | Shelby | 41 35 37 N | 095 26 33 W |
| Tennant Post Office | Post Office | 421 | Shelby | 41 35 37 N | 095 26 28 W |
| Tennessee Cemetery | Cemetery | 342 | Decatur | 40 52 33 N | 093 55 17 W |
| Tennessee Cemetery | Cemetery | 216 | Louisa | 41 16 17 N | 091 22 29 W |
| Tennis Center | Building | 286 | Polk | 41 36 10 N | 093 39 21 W |
| Tenold | Locale | 375 | Worth | 43 23 40 N | 093 21 02 W |
| Tenold Chiropractic Clinic | Hospital | 361 | Wright | 42 50 45 N | 093 37 16 W |
| Tenold Post Office (historical) | Post Office | 372 | Worth | 43 23 20 N | 093 21 36 W |
| Tent Chapel | Church | 325 | Taylor | 40 34 29 N | 094 28 15 W |
| Tent Chapel Cemetery | Cemetery | 328 | Ringgold | 40 34 30 N | 094 28 14 W |
| Tenth Avenue Student Apartments | Building | 254 | Linn | 41 55 27 N | 091 25 46 W |
| Tenville | Populated Place | 323 | Montgomery | 41 00 31 N | 094 59 32 W |
| Tenville Access | Locale | 320 | Montgomery | 41 00 58 N | 094 59 39 W |
| Tenville Post Office (historical) | Post Office | 323 | Montgomery | 41 00 31 N | 094 59 32 W |
| TePaske Theatre | Building | 442 | Sioux | 43 05 15 N | 096 10 01 W |
| Terence Donaghoe Hall | Building | 254 | Dubuque | 42 30 34 N | 090 41 31 W |
| Terney Cemetery | Cemetery | 191 | Lee | 40 43 17 N | 091 13 55 W |
| Terra International Incorporated Elevator | Locale | 446 | O'Brien | 43 10 42 N | 095 28 36 W |
| Terra International Incorporated Elevator | Locale | 360 | Sioux | 42 59 35 N | 096 28 57 W |
| Terrace Elementary School | School | 299 | Polk | 41 44 04 N | 093 36 16 W |
| Terrace Hill | Building | 284 | Polk | 41 34 60 N | 093 38 57 W |
| Terrace Hills Golf Course | Locale | 279 | Polk | 41 38 36 N | 093 25 51 W |
| Terrace Manor Mobile Home Court | Populated Place | 281 | Marshall | 42 00 23 N | 092 47 04 W |
| Terre Haute | Populated Place | 281 | Decatur | 40 41 00 N | 093 52 00 W |
| Terre Haute Cemetery | Cemetery | 291 | Decatur | 40 41 01 N | 093 52 48 W |
| Terre Haute Post Office (historical) | Post Office | 281 | Decatur | 40 41 00 N | 093 52 00 W |
| Terril | Populated Place | 437 | Dickinson | 43 18 21 N | 094 58 18 W |
| Terril (historical) | Locale | 433 | Dickinson | 43 18 10 N | 094 58 06 W |
| Terril Community School | School | 437 | Dickinson | 43 18 18 N | 094 58 26 W |
| Terril Post Office | Post Office | 437 | Dickinson | 43 18 21 N | 094 58 18 W |
| Terril Public Library | Building | 437 | Dickinson | 43 18 21 N | 094 58 18 W |
| Terrill Mill Park | Park | 195 | Johnson | 41 40 40 N | 091 32 05 W |
| Teslow Farm Cemetery | Cemetery | 359 | Winneshiek | 43 16 10 N | 091 38 06 W |
| Tess Morgan Residence Hall | Building | 342 | Decatur | 40 37 04 N | 093 55 41 W |
| Tete De Mort Post Office (historical) | Post Office | 204 | Jackson | 42 21 39 N | 090 32 21 W |
| Tete des Morts Creek | Stream | | Dubuque | 42 22 59 N | 090 29 22 W |
| Teter Cemetery | Cemetery | 260 | Marion | 41 24 14 N | 093 06 47 W |
| Teter Creek | Stream | | Marion | 41 24 19 N | 093 06 18 W |
| Tharp Cemetery | Cemetery | 312 | Wayne | 40 38 51 N | 093 09 27 W |
| Thayer | Locale | 341 | Union | 41 01 40 N | 094 02 51 W |
| Thayer | Populated Place | 337 | Union | 41 01 41 N | 094 03 03 W |
| Thayer Cemetery | Cemetery | 361 | Union | 41 02 15 N | 094 02 10 W |
| Thayer Lake | Reservoir | 341 | Union | 41 01 19 N | 094 03 53 W |
| Thayer Lake Park | Park | 338 | Union | 41 01 20 N | 094 03 56 W |
| Thayer Ponds Public Hunting Area | Area | 337 | Union | 41 01 22 N | 094 03 51 W |
| Thayer Post Office | Post Office | 337 | Union | 41 01 41 N | 094 03 03 W |
| The Abbey | Hospital | 248 | Polk | 41 37 08 N | 093 34 25 W |
| The Backbone | Bend | 304 | Delaware | 42 36 24 N | 091 33 42 W |