Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Adams County Courthouse | Building | 363 | Adams | 40 59 28 N | 094 44 05 W |
| Adams County Fairgrounds | Locale | 343 | Adams | 40 59 40 N | 094 43 49 W |
| Adams County Home | Building | 388 | Adams | 40 58 42 N | 094 42 25 W |
| Adams County House of History | Building | 359 | Adams | 40 59 32 N | 094 44 04 W |
| Adams County Sheriffs Office | Building | 363 | Adams | 40 59 28 N | 094 44 05 W |
| Adams County Speedway | Locale | 340 | Adams | 40 59 40 N | 094 43 41 W |
| Adams Elementary School | School | 394 | Carroll | 42 04 15 N | 094 51 56 W |
| Adams Island | Island | 175 | Clinton | 41 44 40 N | 090 18 58 W |
| Adams Island | Island | 175 | Scott | 41 44 36 N | 090 19 05 W |
| Adams Mill Hollow | Valley | | Clayton | 42 41 56 N | 091 00 35 W |
| Adams Post Office (historical) | Post Office | 193 | Muscatine | 41 28 58 N | 091 14 37 W |
| Adams School | School | 256 | Linn | 42 00 24 N | 091 40 20 W |
| Adams School | School | 269 | Polk | 41 37 44 N | 093 33 42 W |
| Adams School | School | 202 | Scott | 41 33 02 N | 090 36 00 W |
| Adams School (historical) | School | 301 | Polk | 41 45 43 N | 093 38 16 W |
| Adams Townhall | Building | 248 | Mahaska | 41 23 09 N | 092 35 22 W |
| Adamson Cemetery | Cemetery | 305 | Appanoose | 40 39 58 N | 092 57 31 W |
| Adamson Grove Cemetery | Cemetery | 284 | Jasper | 41 39 31 N | 092 59 36 W |
| Adamsonville | Locale | 283 | Jasper | 41 38 40 N | 092 58 41 W |
| Adamsonville Post Office (historical) | Post Office | 283 | Jasper | 41 38 40 N | 092 58 41 W |
| Adas Israel Synagogue | Church | 342 | Cerro Gordo | 43 09 29 N | 093 12 17 W |
| Adaville | Populated Place | 399 | Plymouth | 42 45 03 N | 096 24 16 W |
| Adaville Post Office (historical) | Post Office | 398 | Plymouth | 42 45 01 N | 096 24 18 W |
| Adaville United Methodist Church | Church | 397 | Plymouth | 42 44 58 N | 096 24 21 W |
| Adaza | Populated Place | 342 | Greene | 42 11 43 N | 094 29 40 W |
| Adaza (historical) | Locale | 342 | Greene | 42 11 43 N | 094 29 46 W |
| Adaza Post Office (historical) | Post Office | 342 | Greene | 42 11 43 N | 094 29 40 W |
| Adcock Cemetery | Cemetery | 281 | Wayne | 40 50 00 N | 093 07 33 W |
| Addison | Locale | 342 | Humboldt | 42 40 17 N | 094 13 36 W |
| Addison Post Office (historical) | Post Office | 342 | Humboldt | 42 40 15 N | 094 13 36 W |
| Adel | Populated Place | 272 | Dallas | 41 36 52 N | 094 01 03 W |
| Adel (historical) | Locale | 271 | Dallas | 41 36 55 N | 094 00 55 W |
| Adel Acres Center | Hospital | 294 | Dallas | 41 36 45 N | 094 01 60 W |
| Adel Bridge | Bridge | 272 | Dallas | 41 36 52 N | 094 01 03 W |
| Adel City Hall | Building | 274 | Dallas | 41 37 01 N | 094 01 13 W |
| Adel Clinic | Hospital | 271 | Dallas | 41 37 07 N | 094 01 04 W |
| Adel Desoto High School | School | 278 | Dallas | 41 36 35 N | 094 01 01 W |
| Adel Desoto Middle School | School | 277 | Dallas | 41 37 07 N | 094 01 21 W |
| Adel Elementary School | School | 288 | Dallas | 41 37 17 N | 094 01 43 W |
| Adel Fire Department | Building | 274 | Dallas | 41 37 01 N | 094 01 13 W |
| Adel Historical Museum | Building | 277 | Dallas | 41 37 01 N | 094 01 21 W |
| Adel Island Park | Park | 268 | Dallas | 41 37 07 N | 094 00 37 W |
| Adel Police Department | Building | 271 | Dallas | 41 37 06 N | 094 01 08 W |
| Adel Post Office | Post Office | 281 | Dallas | 41 36 32 N | 094 00 59 W |
| Adel Public Library | Building | 272 | Dallas | 41 37 00 N | 094 01 06 W |
| Adel United Methodist Church | Church | 273 | Dallas | 41 36 60 N | 094 01 10 W |
| Adelphi | Populated Place | 263 | Polk | 41 32 00 N | 093 25 35 W |
| Adelphi (historical) | Locale | 263 | Polk | 41 32 00 N | 093 25 35 W |
| Adelphi Post Office (historical) | Post Office | 263 | Polk | 41 32 00 N | 093 25 35 W |
| Adena | Locale | 427 | Crawford | 41 54 22 N | 095 05 54 W |
| Adena Post Office (historical) | Post Office | 444 | Crawford | 42 00 10 N | 095 06 31 W |
| Adkins Bridge Access | Locale | 290 | Greene | 41 54 45 N | 094 16 31 W |
| Administration Building | Building | 345 | Cerro Gordo | 43 09 30 N | 093 07 59 W |
| Administration Building | Building | 294 | Polk | 41 44 10 N | 093 37 32 W |
| Administration Building | Building | 433 | Sioux | 43 11 05 N | 095 52 51 W |
| Administration Building | Building | 250 | Wapello | 41 02 42 N | 092 23 41 W |
| Admissions Office | Building | 229 | Linn | 41 59 18 N | 091 39 31 W |
| Admissions/Financial Aid Building | Building | 446 | Sioux | 43 04 56 N | 096 10 06 W |
| Adolescent and Pediatric Clinic | Hospital | 205 | Johnson | 41 39 50 N | 091 31 41 W |
| Adolph Munson Park | Park | 360 | Chickasaw | 43 07 10 N | 092 12 32 W |
| Adrian | Locale | 373 | Crawford | 42 11 17 N | 095 37 14 W |
| Adrian Post Office (historical) | Post Office | 398 | Crawford | 42 10 60 N | 095 38 31 W |
| Adult and Pediatric Urology Center | Hospital | 325 | Pottawattamie | 41 16 05 N | 095 50 24 W |
| Advance Chiropractic Clinic | Hospital | 354 | Mitchell | 43 22 43 N | 092 55 25 W |
| Advance Post Office (historical) | Post Office | 325 | Guthrie | 41 49 14 N | 094 21 05 W |
| Advanced Technology Center | Building | 247 | Wapello | 41 02 45 N | 092 23 41 W |
| Advancement Office | Building | 446 | Sioux | 43 04 56 N | 096 10 06 W |
| Advancement Offices | Building | 268 | Dubuque | 42 29 54 N | 090 41 29 W |
| Advent Christian Church | Church | 332 | Montgomery | 40 55 45 N | 094 58 45 W |
| Adventist Cemetery | Cemetery | 425 | Audubon | 41 36 59 N | 094 58 12 W |
| Adventist Church | Church | 433 | Audubon | 41 36 46 N | 094 58 36 W |
| Adventist Church | Church | 442 | Dickinson | 43 19 42 N | 095 01 24 W |
| Adventure-Life Reformed Church | Church | 282 | Polk | 41 38 37 N | 093 29 03 W |
| Adventureland Campground | Locale | 293 | Polk | 41 38 50 N | 093 29 46 W |
| Adventureland Estates | Park | 285 | Polk | 41 38 50 N | 093 29 21 W |
| Aero-Lane Airport | Airport | 344 | Fremont | 40 53 06 N | 095 29 07 W |
| Aerodrome | Airport | 311 | Story | 42 12 01 N | 093 38 03 W |
| Africa and North American Wildlife Museum | Building | 327 | Franklin | 42 53 34 N | 093 12 26 W |
| Afro-American Cultural Center | Building | 214 | Johnson | 41 39 23 N | 091 32 38 W |
| Afton | Locale | 380 | Union | 41 01 48 N | 094 11 51 W |
| Afton | Populated Place | 378 | Union | 41 01 39 N | 094 11 53 W |
| Afton Care Center | Hospital | 379 | Union | 41 02 06 N | 094 12 11 W |
| Afton Catholic Church | Church | 373 | Union | 41 01 56 N | 094 11 52 W |
| Afton Cemetery | Cemetery | 423 | Cherokee | 42 48 23 N | 095 29 12 W |
| Afton City Hall | Building | 379 | Union | 41 01 42 N | 094 11 50 W |
| Afton Junction (historical) | Populated Place | 322 | Union | 41 00 60 N | 094 07 25 W |
| Afton Manor | Building | 281 | Bremer | 42 43 51 N | 092 28 59 W |
| Afton Post Office | Post Office | 372 | Union | 41 01 35 N | 094 11 52 W |
| Agape Christian Family Church | Church | 381 | Cerro Gordo | 43 08 16 N | 093 25 26 W |
| Agassiz School | School | 197 | Wapello | 40 59 53 N | 092 25 02 W |
| Agency | Locale | 244 | Wapello | 40 59 34 N | 092 18 24 W |
| Agency | Populated Place | 247 | Wapello | 40 59 42 N | 092 18 25 W |
| Agency Cemetery | Cemetery | 245 | Wapello | 40 59 30 N | 092 18 27 W |
| Agency City Hall | Building | 247 | Wapello | 40 59 42 N | 092 18 25 W |
| Agency Post Office | Post Office | 247 | Wapello | 40 59 42 N | 092 18 25 W |
| Agency Public Library | Building | 247 | Wapello | 40 59 42 N | 092 18 25 W |
| Agency United Methodist Church | Church | 247 | Wapello | 40 59 44 N | 092 18 19 W |
| Agnes Patterson Memorial Park | Park | 289 | Jasper | 41 42 20 N | 093 01 21 W |
| Agri Grain Marketing Elevator | Locale | 163 | Des Moines | 40 58 00 N | 090 57 31 W |
| Agri Grain Marketing Elevator | Locale | 299 | Pottawattamie | 41 14 00 N | 095 54 31 W |
| Agricola (historical) | Populated Place | 272 | Mahaska | 41 29 57 N | 092 28 31 W |
| Agronomy Greenhouse | Building | 279 | Story | 42 01 47 N | 093 38 27 W |
| Agronomy Hall | Building | 279 | Story | 42 01 47 N | 093 38 27 W |
| Agronomy Lab | Building | 284 | Story | 42 01 45 N | 093 38 36 W |
| Agudas Achim Congregation | Church | 200 | Johnson | 41 39 37 N | 091 31 37 W |
| Agudis Achim Cemetery | Cemetery | 238 | Johnson | 41 41 21 N | 091 31 41 W |
| AGWSR Middle School | School | 324 | Grundy | 42 25 59 N | 092 55 55 W |
| Ahart/Rudd Natural Resource Area | Park | 400 | Crawford | 41 54 15 N | 095 30 36 W |
| Ainsworth | Locale | 205 | Washington | 41 17 15 N | 091 33 06 W |
| Ainsworth | Populated Place | 216 | Washington | 41 17 20 N | 091 33 09 W |