Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Devine World Seminary | School | 315 | Dubuque | 42 26 30 N | 090 56 06 W |
| DeVol Area | Park | 238 | Wapello | 41 08 10 N | 092 24 56 W |
| Devon | Populated Place | 363 | Chickasaw | 43 07 11 N | 092 21 28 W |
| Devon (historical) | Locale | 363 | Chickasaw | 43 07 11 N | 092 21 28 W |
| Devon Post Office (historical) | Post Office | 363 | Chickasaw | 43 07 11 N | 092 21 28 W |
| Devon Woods | Park | 353 | Chickasaw | 43 07 05 N | 092 20 21 W |
| Devonian Fossil Gorge | Locale | 216 | Johnson | 41 43 30 N | 091 32 01 W |
| Devonshire Park | Park | 268 | Black Hawk | 42 28 21 N | 092 22 49 W |
| DeVries Cottage | Building | 436 | Sioux | 42 59 57 N | 096 03 31 W |
| Dewar | Locale | 271 | Black Hawk | 42 31 33 N | 092 13 11 W |
| Dewar | Populated Place | 271 | Black Hawk | 42 31 32 N | 092 13 09 W |
| Dewar Post Office | Post Office | 271 | Black Hawk | 42 31 32 N | 092 13 09 W |
| Dewey | Populated Place | 378 | Cass | 41 11 13 N | 094 45 28 W |
| Dewey Post Office (historical) | Post Office | 378 | Cass | 41 11 13 N | 094 45 28 W |
| Deweys Pasture State Game Management Area | Park | 411 | Clay | 43 11 40 N | 094 55 22 W |
| DeWitt Cemetery | Cemetery | 245 | Marion | 41 18 50 N | 093 08 31 W |
| DeWitt Center | Building | 437 | Sioux | 42 59 48 N | 096 03 33 W |
| Dewitt Park | Park | 181 | Clinton | 41 50 22 N | 090 11 28 W |
| DeWitt Physical Fitness Center | Building | 436 | Sioux | 42 59 46 N | 096 03 36 W |
| Dexfield Community School | School | 303 | Dallas | 41 35 34 N | 094 11 36 W |
| Dexfield Elementary School | School | 348 | Dallas | 41 31 12 N | 094 13 41 W |
| Dexter | Locale | 348 | Dallas | 41 30 50 N | 094 13 37 W |
| Dexter | Populated Place | 348 | Dallas | 41 31 06 N | 094 13 35 W |
| Dexter Baby Grave | Cemetery | 233 | Wapello | 40 56 00 N | 092 25 01 W |
| Dexter Cemetery | Cemetery | 347 | Dallas | 41 30 16 N | 094 14 03 W |
| Dexter City Hall | Building | 351 | Dallas | 41 30 60 N | 094 13 41 W |
| Dexter Library | Building | 351 | Dallas | 41 30 60 N | 094 13 41 W |
| Dexter Post Office | Post Office | 351 | Dallas | 41 30 60 N | 094 13 41 W |
| Dexter United Methodist Church | Church | 295 | Dallas | 41 35 22 N | 094 11 51 W |
| Dey House | Building | 216 | Johnson | 41 40 01 N | 091 32 06 W |
| Diagonal | Populated Place | 350 | Ringgold | 40 48 34 N | 094 20 32 W |
| Diagonal (historical) | Locale | 335 | Ringgold | 40 48 25 N | 094 20 14 W |
| Diagonal Cemetery | Cemetery | 356 | Ringgold | 40 47 38 N | 094 20 13 W |
| Diagonal City Hall | Building | 350 | Ringgold | 40 48 34 N | 094 20 32 W |
| Diagonal Post Office | Post Office | 350 | Ringgold | 40 48 34 N | 094 20 32 W |
| Diagonal Printing Museum | Building | 350 | Ringgold | 40 48 34 N | 094 20 32 W |
| Diagonal School | School | 351 | Ringgold | 40 48 29 N | 094 20 40 W |
| Diagonal United Church | Church | 350 | Ringgold | 40 48 34 N | 094 20 32 W |
| Dial Center for Computer Sciences | Building | 290 | Polk | 41 36 07 N | 093 39 00 W |
| Dialysis Center of Council Bluffs | Hospital | 310 | Pottawattamie | 41 15 47 N | 095 50 51 W |
| Diamond | Populated Place | 288 | Appanoose | 40 45 47 N | 092 57 57 W |
| Diamond B Raceway | Locale | 234 | Lee | 40 43 00 N | 091 27 01 W |
| Diamond Cemetery | Cemetery | 426 | Cherokee | 42 36 56 N | 095 26 54 W |
| Diamond Cemetery | Cemetery | 258 | Jones | 41 57 10 N | 091 02 56 W |
| Diamond Center (historical) | Locale | 417 | Cherokee | 42 36 19 N | 095 26 46 W |
| Diamond Community Church | Church | 224 | Cedar | 41 54 56 N | 090 55 18 W |
| Diamond Lake | Lake | 430 | Dickinson | 43 28 53 N | 095 11 29 W |
| Diamond Lake | Lake | 282 | Poweshiek | 41 35 15 N | 092 33 28 W |
| Diamond Lake Campground | Locale | 274 | Poweshiek | 41 35 35 N | 092 32 31 W |
| Diamond Lake County Park | Park | 277 | Poweshiek | 41 35 10 N | 092 33 01 W |
| Diamond Lake Wildlife Management Area | Park | 430 | Dickinson | 43 28 57 N | 095 11 29 W |
| Diamond Post Office (historical) | Post Office | 288 | Appanoose | 40 45 47 N | 092 57 57 W |
| Diamond Post Office (historical) | Post Office | 417 | Cherokee | 42 36 19 N | 095 26 46 W |
| Diamond Trail Golf Club | Locale | 281 | Jasper | 41 36 29 N | 092 54 17 W |
| Diamondhead Lake | Reservoir | 296 | Guthrie | 41 33 30 N | 094 15 36 W |
| Diamondhead Lake Dam | Dam | 296 | Guthrie | 41 33 30 N | 094 15 36 W |
| Diamondhead Landing Strip | Airport | 292 | Guthrie | 41 33 42 N | 094 15 49 W |
| Dibble Cemetery | Cemetery | 226 | Van Buren | 40 48 03 N | 091 49 27 W |
| Dibble Creek | Stream | | Fayette | 42 59 55 N | 091 39 36 W |
| Dibble Residence Hall | Building | 311 | Poweshiek | 41 45 04 N | 092 43 19 W |
| Dick Creek | Stream | | Wayne | 40 46 40 N | 093 24 06 W |
| Dickcissel Recreation Area | Park | 350 | Boone | 42 02 15 N | 093 49 06 W |
| Dickens | Locale | 405 | Clay | 43 07 52 N | 095 01 28 W |
| Dickens | Populated Place | 407 | Clay | 43 07 53 N | 095 01 25 W |
| Dickens Cemetery | Cemetery | 403 | Clay | 43 07 40 N | 095 00 55 W |
| Dickens Cemetery | Cemetery | 227 | Wapello | 41 05 01 N | 092 14 54 W |
| Dickens Pit | Park | 402 | Clay | 43 07 10 N | 095 00 21 W |
| Dickens Post Office | Post Office | 407 | Clay | 43 07 53 N | 095 01 25 W |
| Dickens Public Library | Building | 407 | Clay | 43 07 53 N | 095 01 25 W |
| Dickersons Branch | Stream | | Decatur | 40 36 47 N | 093 47 20 W |
| Dickey Branch | Stream | | Henry | 40 53 28 N | 091 30 06 W |
| Dickey Post Office (historical) | Post Office | 328 | Bremer | 42 53 05 N | 092 23 54 W |
| Dickieville | Populated Place | 366 | Adams | 41 00 04 N | 094 53 46 W |
| Dickinson County | Civil | 426 | Dickinson | 43 23 00 N | 095 09 01 W |
| Dickinson County Courthouse | Building | 451 | Dickinson | 43 25 20 N | 095 06 09 W |
| Dickinson County Fairgrounds | Locale | 444 | Dickinson | 43 25 24 N | 095 06 39 W |
| Dickinson County Memorial Hospital | Hospital | 444 | Dickinson | 43 25 04 N | 095 07 28 W |
| Dickinson County Memorial Hospital Heliport | Airport | 444 | Dickinson | 43 25 03 N | 095 07 26 W |
| Dickinson County Museum | Building | 446 | Dickinson | 43 25 23 N | 095 06 24 W |
| Dickinson County Sheriffs Office | Building | 451 | Dickinson | 43 25 20 N | 095 06 10 W |
| Dickinson County Spine Trail | Trail | 427 | Dickinson | 43 22 28 N | 095 07 34 W |
| Dickman Cemetery | Cemetery | 282 | Clinton | 42 00 43 N | 090 50 25 W |
| Dickson Branch | Stream | | Carroll | 42 07 28 N | 094 40 47 W |
| Dickson Cemetery | Cemetery | 361 | Carroll | 42 06 27 N | 094 41 39 W |
| Dickson Cemetery | Cemetery | 223 | Jackson | 42 06 28 N | 090 14 13 W |
| Dickson Timber County Park | Park | 326 | Carroll | 42 07 05 N | 094 41 22 W |
| Dieken Wildlife Area | Park | 377 | Howard | 43 28 15 N | 092 19 21 W |
| Diercks Park | Park | 289 | Bremer | 42 40 17 N | 092 20 15 W |
| Dierks Cemetery | Cemetery | 226 | Clinton | 41 53 17 N | 090 13 25 W |
| Diers House | Building | 286 | Bremer | 42 42 37 N | 092 28 51 W |
| Dieseth Hall | Building | 268 | Winneshiek | 43 18 57 N | 091 48 20 W |
| Dietrick Mobile Home Park | Populated Place | 292 | Black Hawk | 42 28 05 N | 092 27 16 W |
| Diggins Slough | Stream | | Louisa | 41 06 22 N | 091 05 15 W |
| Dike | Populated Place | 288 | Grundy | 42 27 51 N | 092 37 42 W |
| Dike (historical) | Locale | 287 | Grundy | 42 27 45 N | 092 37 46 W |
| Dike City Hall | Building | 288 | Grundy | 42 27 51 N | 092 37 42 W |
| Dike Elementary School | School | 290 | Grundy | 42 28 02 N | 092 37 40 W |
| Dike Fire Department | Building | 288 | Grundy | 42 27 51 N | 092 37 42 W |
| Dike New Hartford High School | School | 290 | Grundy | 42 28 02 N | 092 37 40 W |
| Dike Post Office | Post Office | 288 | Grundy | 42 27 51 N | 092 37 42 W |
| Dike Public Library | Building | 288 | Grundy | 42 27 51 N | 092 37 42 W |
| Dillavou Cemetery | Cemetery | 338 | Greene | 42 04 49 N | 094 36 51 W |
| Dillman Cemetery | Cemetery | 306 | Warren | 41 17 49 N | 093 46 40 W |
| Dillon | Locale | 299 | Marshall | 41 58 37 N | 092 49 27 W |
| Dillon | Populated Place | 299 | Marshall | 41 58 37 N | 092 49 27 W |
| Dillon Park | Park | 299 | Marshall | 41 58 40 N | 092 49 26 W |
| Dillon Post Office (historical) | Post Office | 299 | Marshall | 41 58 37 N | 092 49 27 W |
| Dimmit Alumni House | Building | 380 | Woodbury | 42 28 31 N | 096 21 36 W |
| Dimmit Hall | Building | 367 | Woodbury | 42 28 35 N | 096 21 53 W |
| Dinesen Prairie State Preserve Wildlife Area | Park | 380 | Shelby | 41 42 15 N | 095 15 13 W |