Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Darwin Post Office (historical) | Post Office | 333 | Page | 40 48 50 N | 095 08 11 W |
| Dasie Post Office (historical) | Post Office | 349 | Page | 40 47 60 N | 095 11 31 W |
| Daubendiek Park | Park | 306 | Greene | 42 00 28 N | 094 23 02 W |
| Daugherty Creek | Stream | | Taylor | 40 37 45 N | 094 45 07 W |
| Daugherty Farm Cemetery | Cemetery | 193 | Jackson | 42 15 30 N | 090 27 30 W |
| Daum Residence Hall | Building | 215 | Johnson | 41 39 52 N | 091 32 06 W |
| Dave Roberts Farm Cemetery | Cemetery | 236 | Monroe | 41 05 00 N | 092 40 01 W |
| Davenport | Populated Place | 180 | Scott | 41 31 25 N | 090 34 39 W |
| Davenport Art Gallery | Building | 177 | Scott | 41 31 34 N | 090 36 05 W |
| Davenport Church of Christ | Church | 219 | Scott | 41 32 06 N | 090 35 27 W |
| Davenport City Hall | Building | 182 | Scott | 41 31 27 N | 090 34 36 W |
| Davenport Country Club and Golf Course | Locale | 201 | Scott | 41 34 53 N | 090 24 31 W |
| Davenport District Number Nine School (historical) | School | 220 | Scott | 41 32 10 N | 090 37 05 W |
| Davenport East Bound Rest Area | Locale | 226 | Scott | 41 35 44 N | 090 29 25 W |
| Davenport Good Samaritan Center | Hospital | 217 | Scott | 41 31 34 N | 090 37 29 W |
| Davenport Harbor | Bay | 165 | Scott | 41 29 50 N | 090 37 17 W |
| Davenport Heliport | Airport | 171 | Scott | 41 31 10 N | 090 35 13 W |
| Davenport Lutheran Home | Building | 223 | Scott | 41 34 33 N | 090 35 17 W |
| Davenport Medical Center | Hospital | 194 | Scott | 41 33 03 N | 090 35 18 W |
| Davenport Memorial Park | Cemetery | 199 | Scott | 41 33 53 N | 090 33 35 W |
| Davenport Municipal Airport | Airport | 229 | Scott | 41 36 41 N | 090 35 20 W |
| Davenport Police Department | Building | 180 | Scott | 41 31 26 N | 090 34 36 W |
| Davenport Post Office | Post Office | 171 | Scott | 41 31 14 N | 090 35 12 W |
| Davenport Public Library | Building | 189 | Scott | 41 32 55 N | 090 33 05 W |
| Davenport Public Library | Building | 178 | Scott | 41 31 23 N | 090 34 32 W |
| Davenport Seventh Day Adventist Church | Church | 224 | Scott | 41 34 06 N | 090 38 18 W |
| Davenport Soccer Complex | Park | 228 | Scott | 41 36 30 N | 090 35 50 W |
| Davenport West Bound Rest Area | Locale | 226 | Scott | 41 35 51 N | 090 28 45 W |
| David (historical) | Locale | 386 | Mitchell | 43 24 23 N | 092 39 51 W |
| David Bates Memorial Park | Park | 280 | Hardin | 42 16 40 N | 093 04 11 W |
| David Church | Church | 384 | Mitchell | 43 24 10 N | 092 39 56 W |
| David Farm Cemetery | Cemetery | 339 | Montgomery | 40 55 30 N | 095 22 36 W |
| David Post Office (historical) | Post Office | 386 | Mitchell | 43 24 23 N | 092 39 51 W |
| Davids Creek | Stream | | Audubon | 41 35 14 N | 094 53 14 W |
| Davidson Hall | Building | 292 | Story | 42 01 47 N | 093 38 59 W |
| Davies Cemetery | Cemetery | 265 | Davis | 40 40 30 N | 092 25 01 W |
| Davis Airport | Airport | 321 | Wayne | 40 45 16 N | 093 14 29 W |
| Davis Cemetery | Cemetery | 281 | Appanoose | 40 38 18 N | 092 42 18 W |
| Davis Cemetery | Cemetery | 253 | Linn | 42 13 57 N | 091 49 39 W |
| Davis Cemetery | Cemetery | 271 | Marion | 41 16 16 N | 093 02 00 W |
| Davis Cemetery | Cemetery | 309 | Page | 40 40 53 N | 095 00 31 W |
| Davis City | Populated Place | 286 | Decatur | 40 38 21 N | 093 48 42 W |
| Davis City (historical) | Locale | 279 | Decatur | 40 38 15 N | 093 48 31 W |
| Davis City Cemetery | Cemetery | 285 | Decatur | 40 38 30 N | 093 49 07 W |
| Davis City City Hall | Building | 286 | Decatur | 40 38 21 N | 093 48 42 W |
| Davis City Post Office | Post Office | 286 | Decatur | 40 38 21 N | 093 48 42 W |
| Davis Corners | Populated Place | 390 | Howard | 43 22 15 N | 092 17 52 W |
| Davis Corners Post Office (historical) | Post Office | 390 | Howard | 43 22 15 N | 092 17 52 W |
| Davis County | Civil | 268 | Davis | 40 45 02 N | 092 25 01 W |
| Davis County Community High School | School | 262 | Davis | 40 45 08 N | 092 24 31 W |
| Davis County Courthouse | Building | 267 | Davis | 40 45 04 N | 092 24 52 W |
| Davis County Fairgrounds | Locale | 262 | Davis | 40 45 10 N | 092 25 51 W |
| Davis County Historical Museum | Building | 267 | Davis | 40 45 02 N | 092 24 51 W |
| Davis County Home | Building | 259 | Davis | 40 42 59 N | 092 21 43 W |
| Davis County Home and Community | Hospital | 264 | Davis | 40 45 02 N | 092 25 21 W |
| Davis County Hospital | Hospital | 266 | Davis | 40 45 25 N | 092 24 57 W |
| Davis County Hospital Clinic | Hospital | 192 | Wapello | 40 54 58 N | 092 13 11 W |
| Davis County Middle School | School | 258 | Davis | 40 45 19 N | 092 24 31 W |
| Davis County Poor Farm (historical) | Locale | 277 | Davis | 40 46 34 N | 092 33 57 W |
| Davis County Sheriff Office | Building | 267 | Davis | 40 45 04 N | 092 24 51 W |
| Davis County Welcome Center | Building | 264 | Davis | 40 45 14 N | 092 24 51 W |
| Davis Creek | Locale | 201 | Washington | 41 25 52 N | 091 34 01 W |
| Davis Creek | Stream | | Boone | 41 59 42 N | 093 53 08 W |
| Davis Creek | Stream | | Washington | 41 25 30 N | 091 28 51 W |
| Davis Creek Post Office (historical) | Post Office | 208 | Washington | 41 26 00 N | 091 33 56 W |
| Davis Farm Cemetery | Cemetery | 275 | Polk | 41 45 50 N | 093 43 31 W |
| Davis Field | Airport | 307 | Black Hawk | 42 36 60 N | 092 13 01 W |
| Davis Hall | Building | 214 | Scott | 41 32 21 N | 090 34 56 W |
| Davis Park | Park | 253 | Linn | 41 55 43 N | 091 24 49 W |
| Davis Preservation Area | Park | 351 | Calhoun | 42 21 18 N | 094 29 39 W |
| Davis School | School | 309 | Poweshiek | 41 44 13 N | 092 43 31 W |
| Davis School | School | 287 | Warren | 41 18 52 N | 093 40 03 W |
| Davis Street Christian Church | Church | 198 | Wapello | 41 00 02 N | 092 25 15 W |
| Davis Wetland | Park | 318 | Monona | 42 01 45 N | 095 58 11 W |
| Davison Cemetery (historical) | Cemetery | 313 | Page | 40 36 00 N | 094 57 51 W |
| Davisons Creek | Stream | | Marshall | 42 01 34 N | 092 47 14 W |
| Dawson | Locale | 316 | Dallas | 41 50 32 N | 094 13 11 W |
| Dawson | Locale | 309 | Jasper | 41 50 05 N | 093 08 41 W |
| Dawson | Populated Place | 316 | Dallas | 41 50 34 N | 094 13 21 W |
| Dawson Cemetery | Cemetery | 330 | Greene | 42 09 56 N | 094 19 43 W |
| Dawson Post Office | Post Office | 316 | Dallas | 41 50 34 N | 094 13 21 W |
| Dawson Post Office (historical) | Post Office | 309 | Jasper | 41 50 05 N | 093 08 41 W |
| Dawson School Number 7 | School | 317 | Dallas | 41 47 29 N | 094 10 58 W |
| Dawsonburg | Locale | 336 | Fremont | 40 51 30 N | 095 40 16 W |
| Dawsonburg Cemetery | Cemetery | 355 | Fremont | 40 51 00 N | 095 39 31 W |
| Dawsonburg Post Office (historical) | Post Office | 327 | Fremont | 40 52 10 N | 095 41 46 W |
| Day Cemetery | Cemetery | 318 | Marshall | 41 53 19 N | 093 13 36 W |
| Day Cemetery | Cemetery | 277 | Tama | 41 54 03 N | 092 25 07 W |
| Day Field | Airport | 305 | Polk | 41 38 25 N | 093 48 31 W |
| Dayfield | Populated Place | 208 | Muscatine | 41 27 54 N | 091 09 05 W |
| Dayspring Assembly of God Church | Church | 370 | Wright | 42 50 40 N | 093 37 33 W |
| Dayspring Haven Camp | Locale | 327 | Boone | 42 02 40 N | 093 58 17 W |
| Dayton | Populated Place | 236 | Iowa | 41 51 06 N | 092 11 10 W |
| Dayton | Populated Place | 342 | Webster | 42 15 41 N | 094 04 07 W |
| Dayton (historical) | Locale | 332 | Webster | 42 15 33 N | 094 04 06 W |
| Dayton (historical) | Populated Place | 342 | Page | 40 43 43 N | 094 55 33 W |
| Dayton Cemetery | Cemetery | 275 | Iowa | 41 51 20 N | 092 10 34 W |
| Dayton Cemetery | Cemetery | 342 | Webster | 42 15 60 N | 094 04 31 W |
| Dayton City Library | Building | 343 | Webster | 42 15 43 N | 094 04 15 W |
| Dayton Country Club | Locale | 342 | Webster | 42 15 41 N | 094 04 07 W |
| Dayton Park | Park | 293 | Warren | 41 21 60 N | 093 33 09 W |
| Dayton Police Department | Building | 342 | Webster | 42 15 39 N | 094 04 17 W |
| Dayton Post Office | Post Office | 343 | Webster | 42 15 43 N | 094 04 15 W |
| Dayton Post Office (historical) | Post Office | 322 | Bremer | 42 48 23 N | 092 10 52 W |
| Dayton Post Office (historical) | Post Office | 236 | Iowa | 41 51 06 N | 092 11 10 W |
| Dayton Valley Cemetery | Cemetery | 232 | Cedar | 41 55 56 N | 091 01 16 W |
| Daytonville | Populated Place | 240 | Washington | 41 28 34 N | 091 49 45 W |
| Daytonville Mennonite Church | Church | 240 | Washington | 41 28 30 N | 091 49 56 W |
| Daytonville Post Office (historical) | Post Office | 240 | Washington | 41 28 34 N | 091 49 45 W |
| De Kalb | Locale | 296 | Decatur | 40 50 23 N | 093 51 12 W |