Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Denison Primary Care Center | Hospital | 392 | Crawford | 42 01 09 N | 095 21 19 W |
| Denison Wesleyan Church | Church | 411 | Crawford | 42 01 48 N | 095 20 21 W |
| Denman Woods | Forest | 243 | Polk | 41 34 05 N | 093 39 48 W |
| Denmark | Populated Place | 220 | Lee | 40 44 30 N | 091 20 15 W |
| Denmark Cemetery | Cemetery | 210 | Lee | 40 44 42 N | 091 19 57 W |
| Denmark Elementary School | School | 220 | Lee | 40 44 29 N | 091 20 06 W |
| Denmark Post Office | Post Office | 220 | Lee | 40 44 30 N | 091 20 15 W |
| Denning Conservation Area | Park | 208 | Lee | 40 46 01 N | 091 35 41 W |
| Dennis (historical) | Locale | 284 | Appanoose | 40 48 58 N | 092 51 46 W |
| Dennis Post Office (historical) | Post Office | 276 | Appanoose | 40 47 14 N | 092 51 31 W |
| Denniston Knolls Park | Park | 274 | Jasper | 41 41 16 N | 093 04 29 W |
| Denny Cemetery | Cemetery | 303 | Appanoose | 40 49 40 N | 092 47 55 W |
| Denova | Populated Place | 217 | Henry | 40 54 30 N | 091 38 14 W |
| Denova (historical) | Locale | 217 | Henry | 40 54 30 N | 091 38 14 W |
| Denova Post Office (historical) | Post Office | 217 | Henry | 40 54 30 N | 091 38 14 W |
| Densmore Lake | Lake | 177 | Jackson | 42 09 51 N | 090 16 57 W |
| Dental Associates Building | Hospital | 375 | Worth | 43 26 42 N | 093 13 10 W |
| Dental Associates Center | Hospital | 388 | Carroll | 42 04 07 N | 094 51 56 W |
| Dental Associates Center | Hospital | 352 | Chickasaw | 43 03 38 N | 092 19 08 W |
| Dental Care of Red Oak | Hospital | 318 | Montgomery | 41 00 32 N | 095 13 40 W |
| Dental Clinic | Hospital | 445 | Sioux | 43 04 35 N | 096 10 33 W |
| Dental Science Building | Building | 220 | Johnson | 41 39 46 N | 091 33 04 W |
| Denton Cemetery | Cemetery | 262 | Wapello | 40 54 22 N | 092 33 49 W |
| Denton Park | Park | 299 | Delaware | 42 29 04 N | 091 28 05 W |
| Denture Clinic | Hospital | 450 | Lyon | 43 27 13 N | 096 26 03 W |
| Denver | Populated Place | 289 | Bremer | 42 40 17 N | 092 20 15 W |
| Denver (historical) | Locale | 287 | Bremer | 42 40 16 N | 092 20 19 W |
| Denver Baptist Church | Church | 289 | Bremer | 42 40 17 N | 092 20 15 W |
| Denver Chiropractic Clinic | Hospital | 289 | Bremer | 42 40 17 N | 092 20 15 W |
| Denver City Hall | Building | 289 | Bremer | 42 40 17 N | 092 20 15 W |
| Denver City Park | Park | 289 | Bremer | 42 40 17 N | 092 20 15 W |
| Denver Elementary School | School | 300 | Bremer | 42 40 19 N | 092 19 55 W |
| Denver Fire Department | Building | 289 | Bremer | 42 40 17 N | 092 20 15 W |
| Denver High School | School | 301 | Bremer | 42 40 12 N | 092 19 49 W |
| Denver Junction (historical) | Locale | 305 | Bremer | 42 42 02 N | 092 22 07 W |
| Denver Middle School | School | 305 | Bremer | 42 40 09 N | 092 19 49 W |
| Denver Police Department | Building | 289 | Bremer | 42 40 17 N | 092 20 15 W |
| Denver Post Office | Post Office | 289 | Bremer | 42 40 17 N | 092 20 15 W |
| Denver Public Library | Building | 292 | Bremer | 42 40 24 N | 092 20 05 W |
| Denver Sunset Nursing Home | Hospital | 289 | Bremer | 42 40 17 N | 092 20 15 W |
| Depew | Populated Place | 393 | Palo Alto | 43 11 03 N | 094 32 33 W |
| Depew Post Office (historical) | Post Office | 393 | Palo Alto | 43 11 03 N | 094 32 33 W |
| Depot Museum | Building | 328 | Montgomery | 41 00 08 N | 095 13 51 W |
| Depot Park | Park | 291 | Butler | 42 53 55 N | 092 48 14 W |
| Depot-Caboose Riverfront Park | Park | 285 | Butler | 42 34 50 N | 092 47 19 W |
| Deputy Post Office (historical) | Post Office | 421 | Harrison | 41 50 07 N | 095 42 44 W |
| Derby | Populated Place | 329 | Lucas | 40 55 54 N | 093 27 23 W |
| Derby (historical) | Locale | 329 | Lucas | 40 55 54 N | 093 27 23 W |
| Derby Cemetery | Cemetery | 326 | Lucas | 40 56 39 N | 093 26 48 W |
| Derby Cemetery | Cemetery | 299 | Monroe | 40 57 27 N | 092 57 24 W |
| Derby Grange School | School | 273 | Dubuque | 42 32 01 N | 090 44 44 W |
| Derby Post Office | Post Office | 329 | Lucas | 40 55 54 N | 093 27 23 W |
| Derrinane Post Office (historical) | Post Office | 312 | Dubuque | 42 23 50 N | 090 50 21 W |
| Derrough Post Office (historical) | Post Office | 292 | Warren | 41 17 03 N | 093 31 11 W |
| Des Moines | Populated Place | 266 | Polk | 41 36 02 N | 093 36 33 W |
| Des Moines Area Community College | School | 285 | Polk | 41 42 30 N | 093 36 36 W |
| Des Moines Area Community College - Carroll Campus | School | 376 | Carroll | 42 04 06 N | 094 51 29 W |
| Des Moines Beach | Beach | 430 | Des Moines | 43 22 37 N | 095 08 08 W |
| Des Moines Beach | Beach | 437 | Dickinson | 43 22 38 N | 095 08 01 W |
| Des Moines Botanical Garden | Park | 269 | Polk | 41 35 47 N | 093 35 56 W |
| Des Moines Central Campus | School | 249 | Polk | 41 35 02 N | 093 38 31 W |
| Des Moines Church | Church | 238 | Wapello | 40 56 47 N | 092 12 13 W |
| Des Moines Church of God | Church | 299 | Polk | 41 43 20 N | 093 35 28 W |
| Des Moines City Post Office (historical) | Post Office | 204 | Mahaska | 41 10 00 N | 092 39 51 W |
| Des Moines County | Civil | 212 | Des Moines | 40 55 00 N | 091 11 01 W |
| Des Moines County Courthouse | Building | 171 | Des Moines | 40 48 43 N | 091 06 05 W |
| Des Moines County Fairgrounds | Locale | 215 | Des Moines | 40 48 43 N | 091 10 26 W |
| Des Moines County Sheriffs Office | Building | 167 | Des Moines | 40 48 43 N | 091 06 03 W |
| Des Moines East Side Library | Building | 250 | Polk | 41 36 30 N | 093 34 11 W |
| Des Moines Fellowship Church | Church | 289 | Polk | 41 35 42 N | 093 40 02 W |
| Des Moines Fire Department Headquarters | Building | 247 | Polk | 41 35 02 N | 093 37 42 W |
| Des Moines First Friends Church | Church | 261 | Polk | 41 33 22 N | 093 39 26 W |
| Des Moines Forest Avenue Library | Building | 282 | Polk | 41 36 15 N | 093 38 07 W |
| Des Moines Franklin Avenue Library | Building | 296 | Polk | 41 36 40 N | 093 41 20 W |
| Des Moines General Hospital | Hospital | 270 | Polk | 41 35 38 N | 093 36 06 W |
| Des Moines General Hospital Heliport | Airport | 271 | Polk | 41 35 39 N | 093 36 03 W |
| Des Moines Golf and Country Club | Locale | 289 | Dallas | 41 35 50 N | 093 49 01 W |
| Des Moines International Airport | Airport | 280 | Polk | 41 32 05 N | 093 39 38 W |
| Des Moines Junction (historical) | Locale | 351 | Decatur | 40 52 28 N | 093 47 43 W |
| Des Moines Medical Group Center | Hospital | 287 | Polk | 41 33 15 N | 093 37 30 W |
| Des Moines Northeast Branch Church | Church | 253 | Polk | 41 37 45 N | 093 33 13 W |
| Des Moines OBGYN Specialists | Hospital | 282 | Polk | 41 36 17 N | 093 46 29 W |
| Des Moines Park Fair Mall | Locale | 269 | Polk | 41 37 43 N | 093 37 06 W |
| Des Moines Police Department | Building | 238 | Polk | 41 35 10 N | 093 36 56 W |
| Des Moines Post Office | Post Office | 266 | Polk | 41 36 02 N | 093 36 33 W |
| Des Moines Public Library | Building | 241 | Polk | 41 35 15 N | 093 37 07 W |
| Des Moines River | Stream | | Lee | 40 22 52 N | 091 25 21 W |
| Des Moines River Access | Locale | 165 | Van Buren | 40 40 20 N | 091 45 35 W |
| Des Moines River Bridge | Bridge | 327 | Humboldt | 42 43 55 N | 094 15 29 W |
| Des Moines River Bridge | Bridge | 360 | Kossuth | 43 20 43 N | 094 26 35 W |
| Des Moines South Side Library | Building | 283 | Polk | 41 32 02 N | 093 37 03 W |
| Des Moines University Clinic | Building | 284 | Polk | 41 35 00 N | 093 39 41 W |
| Des Moines Valley Friends Church | Church | 296 | Polk | 41 34 60 N | 093 40 27 W |
| Des Moines Vietnamese Buddhist Church | Church | 282 | Polk | 41 36 10 N | 093 38 36 W |
| Deseret Post Office (historical) | Post Office | 386 | Pottawattamie | 41 30 04 N | 095 52 03 W |
| Designer of the Iowa Flag Historical Marker | Park | 266 | Marion | 41 19 10 N | 093 07 16 W |
| Detroit House | Building | 284 | Warren | 41 21 53 N | 093 34 09 W |
| Deuser Cemetery | Cemetery | 244 | Wapello | 41 08 29 N | 092 16 32 W |
| Devil's Creek Access | Locale | 159 | Lee | 40 36 00 N | 091 25 11 W |
| Devils Creek | Stream | | Lee | 40 34 47 N | 091 24 01 W |
| Devils Fork | Stream | | Greene | 42 07 52 N | 094 15 54 W |
| Devils Glen Mobile Home Court | Populated Place | 183 | Scott | 41 32 08 N | 090 28 25 W |
| Devils Glen Park | Park | 197 | Scott | 41 32 04 N | 090 28 47 W |
| Devils Hollow | Valley | | Clayton | 42 39 27 N | 091 08 05 W |
| Devils Hollow | Valley | | Clinton | 41 51 27 N | 090 15 37 W |
| Devils Island | Island | 158 | Lee | 40 35 47 N | 091 23 17 W |
| Devils Ridge Wildlife Area | Park | 476 | Osceola | 43 26 30 N | 095 34 11 W |
| Devils Run | Stream | | Iowa | 41 36 00 N | 092 07 37 W |
| Devils Run | Stream | | Tama | 42 11 44 N | 092 43 46 W |
| Devine Wildlife Area | Park | 334 | Kossuth | 42 56 60 N | 094 13 51 W |