Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| 109 River Street Building | Building | 206 | Johnson | 41 39 59 N | 091 32 32 W |
| 1840 Log Cabin Historical Marker | Park | 214 | Washington | 41 17 55 N | 091 42 26 W |
| 1865 Memorial for "40 Boys" Historical Marker | Park | 292 | Marion | 41 12 20 N | 093 09 06 W |
| 4-H Fairgrounds | Locale | 212 | Clinton | 41 49 30 N | 090 31 45 W |
| 4-H Park | Park | 291 | Story | 42 01 07 N | 093 27 43 W |
| 4-H Schoolhouse Museum | Building | 357 | Wright | 42 43 56 N | 093 44 05 W |
| 5 x 80 Golf Course | Locale | 399 | Adair | 41 29 35 N | 094 26 51 W |
| A and K Feed and Grain Company Elevator | Locale | 379 | Howard | 43 26 51 N | 092 16 53 W |
| A Avenue Chiropractic Clinic | Hospital | 257 | Mahaska | 41 17 45 N | 092 39 12 W |
| A G Partners Elevator | Locale | 377 | Palo Alto | 43 06 36 N | 094 40 27 W |
| A N Kuyper Stadium | Park | 266 | Marion | 41 24 12 N | 092 55 21 W |
| A-H-S-T Elementary School | School | 369 | Pottawattamie | 41 28 48 N | 095 20 13 W |
| A-H-S-T High School | School | 344 | Pottawattamie | 41 28 12 N | 095 20 30 W |
| Aase Haugen Homes | Hospital | 263 | Winneshiek | 43 18 12 N | 091 48 01 W |
| Abandoned Timber Cemetery | Cemetery | 376 | Adair | 41 29 00 N | 094 28 51 W |
| Abbas Chiropractic Clinic | Hospital | 377 | Cerro Gordo | 43 08 06 N | 093 22 42 W |
| Abbe Cemetery | Cemetery | 171 | Henry | 40 51 50 N | 091 28 41 W |
| Abbe Creek | Stream | | Linn | 41 57 12 N | 091 31 35 W |
| Abbe Creek Cemetery | Cemetery | 238 | Linn | 41 56 31 N | 091 27 07 W |
| Abbe Creek School (historical) | School | 238 | Linn | 41 56 28 N | 091 27 14 W |
| Abben Cancer Center | Hospital | 402 | Clay | 43 08 58 N | 095 08 35 W |
| Abbeyville Post Office (historical) | Post Office | 318 | Delaware | 42 18 40 N | 091 26 26 W |
| Abbie Gardner Cabin | Building | 433 | Dickinson | 43 21 56 N | 095 08 26 W |
| Abbott | Locale | 338 | Hardin | 42 29 05 N | 093 04 01 W |
| Abbott | Populated Place | 335 | Hardin | 42 29 07 N | 093 03 59 W |
| Abbott Crossing | Locale | 341 | Hardin | 42 28 60 N | 093 04 01 W |
| Abbott Crossing (historical) | Populated Place | 336 | Hardin | 42 29 35 N | 093 04 15 W |
| Abbott Post Office (historical) | Post Office | 335 | Hardin | 42 29 07 N | 093 03 59 W |
| ABC City Park | Park | 412 | Adair | 41 12 08 N | 094 25 06 W |
| ABC Dermatology Center | Hospital | 167 | Des Moines | 40 48 36 N | 091 06 07 W |
| Abegg Cemetery | Cemetery | 274 | Wapello | 40 55 10 N | 092 36 31 W |
| Abegglen Cemetery | Cemetery | 270 | Monroe | 41 05 46 N | 092 54 44 W |
| Abel Cemetery | Cemetery | 249 | Keokuk | 41 13 08 N | 092 21 09 W |
| Abel Cemetery | Cemetery | 361 | Union | 40 58 47 N | 094 08 36 W |
| Abels Island Airport | Airport | 188 | Clayton | 42 48 33 N | 091 05 53 W |
| Abes Fork | Stream | | Tama | 41 53 55 N | 092 37 14 W |
| Abingdon | Populated Place | 236 | Jefferson | 41 04 56 N | 092 08 21 W |
| Abingdon Cemetery | Cemetery | 230 | Jefferson | 41 04 58 N | 092 08 06 W |
| Abingdon Post Office (historical) | Post Office | 236 | Jefferson | 41 04 56 N | 092 08 21 W |
| Abington on Grand Center | Hospital | 291 | Story | 42 03 20 N | 093 37 10 W |
| Abraham Farm Cemetery | Cemetery | 213 | Henry | 40 54 30 N | 091 30 56 W |
| Abraham Lincoln Statue | Park | 327 | Greene | 42 00 57 N | 094 22 27 W |
| Abram Clark Historical Marker | Park | 227 | Lee | 40 46 40 N | 091 26 23 W |
| Absecom Post Office (historical) | Post Office | 235 | Jefferson | 40 57 30 N | 092 09 09 W |
| Abshire Cemetery | Cemetery | 335 | Fremont | 40 46 00 N | 095 39 31 W |
| Abundant Life Assembly of God Church | Church | 378 | Crawford | 42 01 00 N | 095 20 21 W |
| Abundant Life Assembly of God Church | Church | 184 | Louisa | 41 16 48 N | 091 21 39 W |
| Abundant Life Christian Fellowship | Church | 308 | Fayette | 42 50 08 N | 091 48 04 W |
| Abundant Life Christian Fellowship | Church | 333 | Humboldt | 42 43 35 N | 094 13 09 W |
| Abundant Life Church | Church | 398 | Union | 41 03 09 N | 094 21 34 W |
| Abundant Life Community Church | Church | 285 | Polk | 41 31 46 N | 093 35 50 W |
| Abundant Life Fellowship | Church | 384 | Shelby | 41 38 47 N | 095 19 57 W |
| Abundant Life Ministries | Church | 323 | Greene | 42 00 56 N | 094 23 44 W |
| Academic Center | Building | 284 | Polk | 41 35 00 N | 093 39 41 W |
| Academic Center | Building | 264 | Polk | 41 33 44 N | 093 38 44 W |
| Academic Support Services Building | Building | 250 | Wapello | 41 02 42 N | 092 23 41 W |
| Access Foot Care | Hospital | 290 | Polk | 41 37 47 N | 093 43 16 W |
| Ace Mobile Home Park | Populated Place | 253 | Dubuque | 42 29 00 N | 090 43 00 W |
| Achey Cemetery | Cemetery | 247 | Cedar | 41 50 16 N | 091 17 20 W |
| Achilles Rogers Historical Marker | Park | 230 | Keokuk | 41 16 37 N | 092 12 19 W |
| Ackerman Cut | Channel | 184 | Clayton | 42 46 22 N | 091 04 35 W |
| Ackerson-Easterly Wildlife Area | Park | 338 | Chickasaw | 43 09 40 N | 092 30 36 W |
| Acklan Cemetery | Cemetery | 219 | Lee | 40 39 31 N | 091 40 50 W |
| Ackley | Locale | 334 | Hardin | 42 33 20 N | 093 03 11 W |
| Ackley | Populated Place | 333 | Hardin | 42 33 15 N | 093 03 12 W |
| Ackley Christian Reformed Church | Church | 331 | Grundy | 42 33 23 N | 092 57 60 W |
| Ackley Country Club | Locale | 327 | Hardin | 42 32 45 N | 093 02 59 W |
| Ackley Creek | Stream | | Floyd | 42 57 07 N | 092 52 07 W |
| Ackley Creek Park | Park | 303 | Floyd | 42 57 10 N | 092 52 33 W |
| Ackley Heritage Center | Building | 333 | Hardin | 42 33 15 N | 093 02 57 W |
| Ackley Municipal Airport | Airport | 323 | Hardin | 42 32 45 N | 093 02 03 W |
| Ackley Post Office | Post Office | 333 | Hardin | 42 33 13 N | 093 03 14 W |
| Ackley Public Library | Building | 332 | Hardin | 42 33 11 N | 093 03 06 W |
| Ackley-Geneva Community School | School | 330 | Hardin | 42 33 06 N | 093 03 02 W |
| Ackley-Geneva High School | School | 327 | Hardin | 42 32 59 N | 093 02 56 W |
| Ackworth | Populated Place | 273 | Warren | 41 22 01 N | 093 28 22 W |
| Ackworth (historical) | Locale | 275 | Warren | 41 22 00 N | 093 28 25 W |
| Ackworth Cemetery | Cemetery | 274 | Warren | 41 22 03 N | 093 28 23 W |
| Ackworth Friends Church | Church | 275 | Warren | 41 22 00 N | 093 28 25 W |
| Ackworth Post Office | Post Office | 275 | Warren | 41 22 00 N | 093 28 25 W |
| Acme Post Office (historical) | Post Office | 369 | Howard | 43 19 08 N | 092 30 22 W |
| Acord Cemetery | Cemetery | 362 | Fremont | 40 47 35 N | 095 40 01 W |
| Acorn Park Golf and Recreation | Locale | 340 | Mitchell | 43 23 20 N | 092 56 26 W |
| Activities Center | Building | 264 | Polk | 41 33 44 N | 093 38 44 W |
| Activity Center Complex | Building | 345 | Cerro Gordo | 43 09 30 N | 093 07 59 W |
| Adair | Locale | 432 | Adair | 41 29 59 N | 094 38 21 W |
| Adair | Populated Place | 447 | Guthrie | 41 30 02 N | 094 38 37 W |
| Adair City Fire Department | Building | 447 | Adair | 41 30 02 N | 094 38 36 W |
| Adair City Hall | Building | 447 | Adair | 41 30 02 N | 094 38 31 W |
| Adair City Park | Park | 441 | Adair | 41 29 54 N | 094 38 31 W |
| Adair Community Health Center | Hospital | 445 | Adair | 41 30 17 N | 094 38 42 W |
| Adair County | Civil | 413 | Adair | 41 20 00 N | 094 28 01 W |
| Adair County Cemetery | Cemetery | 407 | Adair | 41 20 04 N | 094 25 59 W |
| Adair County Courthouse | Building | 416 | Adair | 41 18 19 N | 094 27 40 W |
| Adair County Fairgrounds | Locale | 415 | Adair | 41 18 40 N | 094 26 41 W |
| Adair County Historical Museum | Building | 384 | Adair | 41 18 14 N | 094 28 52 W |
| Adair County Memorial Hospital | Hospital | 412 | Adair | 41 18 13 N | 094 27 01 W |
| Adair County Sheriff Department | Building | 417 | Adair | 41 18 18 N | 094 27 27 W |
| Adair East Bound Rest Area | Locale | 421 | Adair | 41 29 46 N | 094 33 40 W |
| Adair Library | Building | 447 | Adair | 41 30 02 N | 094 38 31 W |
| Adair Medical Center | Hospital | 446 | Adair | 41 30 15 N | 094 38 42 W |
| Adair Police Department | Building | 447 | Adair | 41 30 02 N | 094 38 36 W |
| Adair Post Office | Post Office | 447 | Adair | 41 30 02 N | 094 38 31 W |
| Adair Viaduct | Bridge | 425 | Adair | 41 29 35 N | 094 39 07 W |
| Adair West Bound Rest Area | Locale | 395 | Adair | 41 29 51 N | 094 34 25 W |
| Adair Wildlife Management Area | Park | 399 | Adair | 41 16 50 N | 094 37 06 W |
| Adair-Casey High School | School | 400 | Guthrie | 41 31 13 N | 094 35 00 W |
| Adams (historical) | Locale | 193 | Muscatine | 41 28 58 N | 091 14 37 W |
| Adams Cemetery | Cemetery | 257 | Davis | 40 49 41 N | 092 34 39 W |
| Adams County | Civil | 374 | Adams | 41 02 00 N | 094 42 01 W |