Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Apostolic Christian Cemetery | Cemetery | 360 | Kossuth | 42 57 46 N | 094 25 25 W |
| Apostolic Christian Cemetery | Cemetery | 414 | Lyon | 43 24 22 N | 096 18 16 W |
| Apostolic Christian Church | Church | 253 | Davis | 40 41 49 N | 092 16 24 W |
| Apostolic Christian Church | Church | 255 | Fayette | 42 57 20 N | 091 37 33 W |
| Apostolic Christian Church | Church | 234 | Johnson | 41 44 56 N | 091 36 05 W |
| Apostolic Christian Church | Church | 165 | Louisa | 41 05 59 N | 091 02 41 W |
| Apostolic Christian Church | Church | 429 | Lyon | 43 26 41 N | 096 19 59 W |
| Apostolic Christian Fellowship | Church | 360 | Palo Alto | 42 57 10 N | 094 26 58 W |
| Apostolic Church | Church | 174 | Des Moines | 41 03 21 N | 091 02 43 W |
| Apostolic Church | Church | 278 | Marion | 41 19 14 N | 093 06 07 W |
| Apostolic Church | Church | 357 | Palo Alto | 42 57 60 N | 094 25 25 W |
| Apostolic Church of Christ | Church | 220 | Wapello | 41 01 17 N | 092 24 40 W |
| Apostolic Church of Deliverance | Church | 341 | Webster | 42 30 28 N | 094 10 23 W |
| Apostolic Church of Tipton | Church | 243 | Cedar | 41 46 14 N | 091 07 11 W |
| Apostolic Faith Tabernacle Church | Church | 365 | Woodbury | 42 30 02 N | 096 25 37 W |
| Apostolic Faith United Church | Church | 202 | Lee | 40 24 53 N | 091 24 09 W |
| Apostolic Lighthouse Church | Church | 395 | Union | 41 03 03 N | 094 21 45 W |
| Apostolic Pentecostal Church | Church | 287 | Appanoose | 40 44 13 N | 092 53 16 W |
| Apostolic Pentecostal Church | Church | 262 | Black Hawk | 42 29 40 N | 092 23 15 W |
| Apostolic Temple of Victory | Church | 180 | Clinton | 41 50 56 N | 090 11 42 W |
| Appanoose Country Club | Locale | 294 | Appanoose | 40 44 56 N | 092 53 41 W |
| Appanoose County | Civil | 276 | Appanoose | 40 45 02 N | 092 52 01 W |
| Appanoose County Courthouse | Building | 307 | Appanoose | 40 44 03 N | 092 52 28 W |
| Appanoose County Farm | Locale | 309 | Appanoose | 40 43 33 N | 092 56 41 W |
| Appanoose County Museum and Old Jail | Building | 301 | Appanoose | 40 44 10 N | 092 52 26 W |
| Appanoose Hall | Building | 250 | Wapello | 41 02 42 N | 092 23 41 W |
| Appanoose Law Enforcement Center | Building | 295 | Appanoose | 40 44 08 N | 092 53 03 W |
| Appel Cemetery | Cemetery | 250 | Mahaska | 41 26 51 N | 092 47 11 W |
| Apple Creek | Stream | | Linn | 42 11 53 N | 091 48 09 W |
| Apple Grove Post Office (historical) | Post Office | 278 | Polk | 41 37 50 N | 093 22 01 W |
| Apple Trees Museum | Building | 211 | Des Moines | 40 47 52 N | 091 07 04 W |
| Applied Technology Building | Building | 203 | Scott | 41 32 47 N | 090 28 06 W |
| Aquilla Grove Post Office (historical) | Post Office | 323 | Winneshiek | 43 22 40 N | 091 44 31 W |
| Aquin Elementary School | School | 254 | Dubuque | 42 17 56 N | 091 01 11 W |
| Aquinas East Primary School | School | 169 | Lee | 40 37 56 N | 091 18 25 W |
| Aquinas High School | School | 175 | Lee | 40 38 11 N | 091 20 36 W |
| Aquinas West Middle School | School | 163 | Lee | 40 37 44 N | 091 20 15 W |
| AR-WE-VA Elementary School | School | 437 | Carroll | 42 05 08 N | 095 02 52 W |
| AR-WE-VA Junior-Senior High School | School | 411 | Crawford | 42 04 31 N | 095 06 04 W |
| Aras Family Clinic | Hospital | 208 | Scott | 41 33 33 N | 090 35 20 W |
| Arbor Hill | Populated Place | 342 | Adair | 41 21 60 N | 094 19 06 W |
| Arbor Hill Post Office (historical) | Post Office | 375 | Adair | 41 20 24 N | 094 17 47 W |
| Arbor Lake Mobile Home Community | Populated Place | 302 | Poweshiek | 41 44 08 N | 092 43 48 W |
| Arbor Recreation Area | Park | 290 | Poweshiek | 41 44 03 N | 092 43 59 W |
| Arbuthnot Cemetery | Cemetery | 252 | Tama | 41 56 30 N | 092 18 01 W |
| Arcadia | Locale | 421 | Carroll | 42 04 44 N | 095 02 41 W |
| Arcadia | Populated Place | 441 | Carroll | 42 05 14 N | 095 02 46 W |
| Arcadia Ball Field | Park | 441 | Carroll | 42 05 15 N | 095 02 45 W |
| Arcadia Cemetery | Cemetery | 424 | Carroll | 42 06 00 N | 095 00 46 W |
| Arcadia City Hall | Building | 441 | Carroll | 42 05 15 N | 095 02 45 W |
| Arcadia Fire Department | Building | 441 | Carroll | 42 05 15 N | 095 02 45 W |
| Arcadia Police Department | Building | 441 | Carroll | 42 05 15 N | 095 02 45 W |
| Arcadia Post Office | Post Office | 441 | Carroll | 42 05 15 N | 095 02 45 W |
| Archer | Populated Place | 448 | O'Brien | 43 06 55 N | 095 44 45 W |
| Archer (historical) | Locale | 448 | O'Brien | 43 06 55 N | 095 44 45 W |
| Archer Cooperative Grain Elevator | Locale | 448 | O'Brien | 43 06 55 N | 095 44 45 W |
| Archer Post Office | Post Office | 448 | O'Brien | 43 06 55 N | 095 44 45 W |
| Archer Public Library | Building | 448 | O'Brien | 43 06 55 N | 095 44 45 W |
| Archer Reformed Church | Church | 448 | O'Brien | 43 06 55 N | 095 44 45 W |
| Arcola | Locale | 331 | Monona | 42 03 30 N | 095 58 31 W |
| Arcola Creek | Stream | | Monona | 42 02 57 N | 095 59 59 W |
| Arcola Post Office (historical) | Post Office | 432 | Monona | 42 43 03 N | 095 58 39 W |
| Ardell Kader City Park | Park | 223 | Clayton | 42 51 14 N | 091 24 19 W |
| Ardon | Populated Place | 228 | Muscatine | 41 23 42 N | 091 11 19 W |
| Ardon (historical) | Locale | 228 | Muscatine | 41 23 42 N | 091 11 19 W |
| Ardon Cemetery | Cemetery | 229 | Muscatine | 41 23 06 N | 091 11 46 W |
| Ardon Post Office (historical) | Post Office | 228 | Muscatine | 41 23 42 N | 091 11 19 W |
| Area 10 College | School | 219 | Linn | 41 56 07 N | 091 40 31 W |
| Area Bible Fellowship Church | Church | 385 | Taylor | 40 48 03 N | 094 28 33 W |
| Area Wide Foot and Ankle Center | Hospital | 201 | Scott | 41 32 59 N | 090 30 12 W |
| Aredale | Populated Place | 311 | Butler | 42 49 59 N | 093 00 20 W |
| Aredale (historical) | Locale | 311 | Butler | 42 50 04 N | 093 00 21 W |
| Aredale Post Office | Post Office | 311 | Butler | 42 49 59 N | 093 00 20 W |
| Aredale Town Hall | Building | 311 | Butler | 42 49 59 N | 093 00 20 W |
| Aretas Lodge Cemetery | Cemetery | 441 | Audubon | 41 43 45 N | 094 55 19 W |
| Arey School | School | 340 | Webster | 42 30 17 N | 094 10 31 W |
| Argand | Populated Place | 298 | Jones | 42 16 54 N | 091 20 44 W |
| Argand Post Office (historical) | Post Office | 295 | Jones | 42 16 54 N | 091 18 41 W |
| Argland (historical) | Locale | 264 | Jones | 42 16 58 N | 091 16 31 W |
| Argo | Populated Place | 234 | Scott | 41 37 33 N | 090 25 57 W |
| Argo Post Office (historical) | Post Office | 325 | Lucas | 40 58 12 N | 093 29 56 W |
| Argo Post Office (historical) | Post Office | 234 | Scott | 41 37 33 N | 090 25 57 W |
| Argo School (historical) | School | 233 | Scott | 41 38 01 N | 090 25 56 W |
| Argo Slough | Stream | | Lyon | 43 23 43 N | 095 56 47 W |
| Argyle | Locale | 203 | Lee | 40 31 55 N | 091 33 46 W |
| Argyle | Populated Place | 206 | Lee | 40 31 54 N | 091 33 59 W |
| Argyle City Hall | Building | 206 | Lee | 40 31 54 N | 091 33 59 W |
| Argyle Memorial Cemetery | Cemetery | 193 | Lee | 40 31 55 N | 091 32 31 W |
| Argyle Post Office | Post Office | 206 | Lee | 40 31 54 N | 091 33 59 W |
| Argyle Presbyterian Church | Church | 206 | Lee | 40 31 54 N | 091 33 59 W |
| Arian Cemetery | Cemetery | 273 | Marion | 41 14 10 N | 093 15 31 W |
| Arion | Locale | 348 | Crawford | 41 56 51 N | 095 27 54 W |
| Arion | Populated Place | 352 | Crawford | 41 56 57 N | 095 27 49 W |
| Arion Access | Locale | 343 | Crawford | 41 56 40 N | 095 27 21 W |
| Arion Post Office | Post Office | 350 | Crawford | 41 56 55 N | 095 27 51 W |
| Arispe | Populated Place | 387 | Union | 40 56 58 N | 094 13 09 W |
| Arispe (historical) | Locale | 387 | Union | 40 57 02 N | 094 13 20 W |
| Arispe Post Office | Post Office | 387 | Union | 40 56 58 N | 094 13 09 W |
| Arlington | Populated Place | 344 | Fayette | 42 44 57 N | 091 40 17 W |
| Arlington (historical) | Locale | 340 | Fayette | 42 45 05 N | 091 40 09 W |
| Arlington Cemetery | Cemetery | 360 | Fayette | 42 44 17 N | 091 41 09 W |
| Arlington Cemetery | Cemetery | 343 | Montgomery | 40 59 51 N | 095 00 35 W |
| Arlington Cemetery | Cemetery | 366 | Woodbury | 42 29 49 N | 096 03 28 W |
| Arlington Fire Station | Building | 344 | Fayette | 42 44 57 N | 091 40 17 W |
| Arlington Heights Cemetery | Cemetery | 420 | Audubon | 41 43 38 N | 094 55 31 W |
| Arlington Post Office | Post Office | 344 | Fayette | 42 44 58 N | 091 40 18 W |
| Arlington Public Library | Building | 344 | Fayette | 42 44 58 N | 091 40 19 W |
| Armah | Populated Place | 265 | Iowa | 41 31 53 N | 092 12 34 W |
| Armah Church | Church | 265 | Iowa | 41 31 53 N | 092 12 43 W |
| Armah Post Office (historical) | Post Office | 265 | Iowa | 41 31 53 N | 092 12 34 W |