Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Atkins (historical) | Locale | 256 | Benton | 41 59 52 N | 091 51 51 W |
| Atkins City Hall | Building | 259 | Benton | 41 59 46 N | 091 51 36 W |
| Atkins Fire Department | Building | 258 | Benton | 41 59 50 N | 091 51 39 W |
| Atkins Library | Building | 262 | Benton | 41 59 48 N | 091 51 43 W |
| Atkins Memorial Union Hall | Building | 262 | Benton | 41 59 48 N | 091 51 43 W |
| Atkins Post Office | Post Office | 262 | Benton | 41 59 48 N | 091 51 43 W |
| Atkins Roundhouse Area | Park | 269 | Benton | 41 59 50 N | 091 50 36 W |
| Atlanta | Locale | 288 | Buchanan | 42 19 32 N | 091 39 18 W |
| Atlanta Post Office (historical) | Post Office | 274 | Buchanan | 42 18 40 N | 091 41 06 W |
| Atlantic | Populated Place | 369 | Cass | 41 24 13 N | 095 00 50 W |
| Atlantic Cemetery | Cemetery | 386 | Cass | 41 24 06 N | 094 58 54 W |
| Atlantic City Hall | Building | 358 | Cass | 41 24 25 N | 095 00 43 W |
| Atlantic City Park | Park | 367 | Cass | 41 24 16 N | 095 00 50 W |
| Atlantic Country Club | Locale | 405 | Cass | 41 23 04 N | 095 00 54 W |
| Atlantic Dental Center | Hospital | 370 | Cass | 41 24 09 N | 094 59 35 W |
| Atlantic Fire Department | Building | 350 | Cass | 41 24 15 N | 095 01 41 W |
| Atlantic Gospel Chapel | Church | 377 | Cass | 41 23 54 N | 095 00 39 W |
| Atlantic Medical Center | Hospital | 383 | Cass | 41 24 04 N | 094 59 31 W |
| Atlantic Middle School | School | 373 | Cass | 41 23 58 N | 095 00 21 W |
| Atlantic Municipal Airport | Airport | 351 | Cass | 41 24 26 N | 095 02 48 W |
| Atlantic Nursing and Rehabilitation Center | Hospital | 363 | Cass | 41 23 49 N | 095 01 50 W |
| Atlantic Police Department | Building | 358 | Cass | 41 24 25 N | 095 00 43 W |
| Atlantic Post Office | Post Office | 359 | Cass | 41 24 22 N | 095 00 43 W |
| Atlantic Public Library | Building | 361 | Cass | 41 24 20 N | 095 00 53 W |
| Atlantic Senior High School | School | 392 | Cass | 41 23 46 N | 094 59 46 W |
| Atonement Lutheran Church | Church | 212 | Clinton | 41 50 45 N | 090 13 14 W |
| Attica | Populated Place | 280 | Marion | 41 13 47 N | 093 00 58 W |
| Attica Post Office (historical) | Post Office | 280 | Marion | 41 13 47 N | 093 00 58 W |
| Atwell Point | Cape | 426 | Dickinson | 43 23 08 N | 095 09 03 W |
| Atwood | Populated Place | 213 | Keokuk | 41 19 30 N | 092 24 22 W |
| Atwood (historical) | Locale | 213 | Keokuk | 41 19 30 N | 092 24 22 W |
| Atwood Post Office (historical) | Post Office | 213 | Keokuk | 41 19 30 N | 092 24 22 W |
| Auburn | Locale | 212 | Mahaska | 41 16 10 N | 092 47 46 W |
| Auburn | Populated Place | 373 | Sac | 42 15 05 N | 094 52 40 W |
| Auburn City Hall | Building | 374 | Sac | 42 15 02 N | 094 52 41 W |
| Auburn Community Building | Building | 374 | Sac | 42 15 02 N | 094 52 41 W |
| Auburn Fire Department | Building | 374 | Sac | 42 15 02 N | 094 52 41 W |
| Auburn Hills Park | Park | 233 | Johnson | 41 42 30 N | 091 34 06 W |
| Auburn Manor | Hospital | 314 | Lucas | 41 01 05 N | 093 18 23 W |
| Auburn Police Department | Building | 374 | Sac | 42 15 02 N | 094 52 41 W |
| Auburn Post Office | Post Office | 374 | Sac | 42 15 01 N | 094 52 41 W |
| Auburn Post Office (historical) | Post Office | 212 | Mahaska | 41 16 10 N | 092 47 46 W |
| Auburn Public Library | Building | 374 | Sac | 42 15 02 N | 094 52 41 W |
| Auburn Township Cemetery | Cemetery | 297 | Fayette | 43 04 15 N | 091 50 21 W |
| Audubon | Populated Place | 398 | Audubon | 41 43 05 N | 094 55 57 W |
| Audubon (historical) | Locale | 395 | Audubon | 41 43 15 N | 094 56 09 W |
| Audubon Assembly of God Church | Church | 396 | Audubon | 41 42 56 N | 094 56 11 W |
| Audubon Centre Post Office (historical) | Post Office | 387 | Audubon | 41 40 55 N | 094 53 06 W |
| Audubon Church of Christ | Church | 393 | Audubon | 41 42 32 N | 094 55 37 W |
| Audubon City Hall and Memorial Building | Building | 413 | Audubon | 41 43 20 N | 094 55 51 W |
| Audubon Community High School | School | 414 | Audubon | 41 42 45 N | 094 55 17 W |
| Audubon County | Civil | 422 | Audubon | 41 41 00 N | 094 54 01 W |
| Audubon County Airport | Airport | 391 | Audubon | 41 42 05 N | 094 55 14 W |
| Audubon County Courthouse | Building | 413 | Audubon | 41 43 17 N | 094 55 47 W |
| Audubon County Courthouse Museum | Building | 385 | Audubon | 41 35 29 N | 094 52 30 W |
| Audubon County Fairground | Locale | 396 | Audubon | 41 43 34 N | 094 56 31 W |
| Audubon County Fairgrounds | Locale | 398 | Audubon | 41 43 30 N | 094 56 31 W |
| Audubon County Memorial Hospital | Hospital | 403 | Audubon | 41 42 56 N | 094 56 16 W |
| Audubon County Memorial Hospital Heliport | Airport | 412 | Audubon | 41 42 56 N | 094 56 19 W |
| Audubon County Sheriffs Office | Building | 413 | Audubon | 41 43 17 N | 094 55 47 W |
| Audubon County Speedway | Locale | 396 | Audubon | 41 43 35 N | 094 56 31 W |
| Audubon Dental Center | Hospital | 410 | Audubon | 41 43 19 N | 094 55 54 W |
| Audubon Elementary School | School | 406 | Audubon | 41 43 07 N | 094 55 43 W |
| Audubon Family Dental Clinic | Hospital | 408 | Audubon | 41 43 12 N | 094 55 48 W |
| Audubon Fire Department | Building | 413 | Audubon | 41 43 17 N | 094 55 47 W |
| Audubon Golf and Country Club | Locale | 411 | Audubon | 41 43 05 N | 094 56 31 W |
| Audubon Middle School | School | 407 | Audubon | 41 43 08 N | 094 55 43 W |
| Audubon Police Department | Building | 413 | Audubon | 41 43 20 N | 094 55 51 W |
| Audubon Post Office | Post Office | 408 | Audubon | 41 43 12 N | 094 55 49 W |
| Audubon Public Library | Building | 413 | Audubon | 41 43 18 N | 094 55 53 W |
| Audubon School | School | 187 | Dubuque | 42 30 53 N | 090 39 58 W |
| Audubon Vision Clinic | Hospital | 413 | Audubon | 41 43 18 N | 094 55 53 W |
| August Beresheim House | Building | 322 | Pottawattamie | 41 15 17 N | 095 50 52 W |
| Augusta | Populated Place | 177 | Des Moines | 40 45 29 N | 091 16 33 W |
| Augusta Access | Locale | 166 | Lee | 40 45 08 N | 091 16 37 W |
| Augusta Cemetery | Cemetery | 200 | Des Moines | 40 45 40 N | 091 16 01 W |
| Augusta Post Office (historical) | Post Office | 177 | Des Moines | 40 45 29 N | 091 16 33 W |
| Augustana Evangelical Lutheran Church | Church | 375 | Calhoun | 42 31 29 N | 094 32 24 W |
| Augustana Lutheran Church | Church | 338 | Boone | 42 03 13 N | 093 53 02 W |
| Augustana Lutheran Church | Church | 351 | Woodbury | 42 29 48 N | 096 23 46 W |
| Auld Park | Park | 274 | Marion | 41 19 25 N | 093 05 49 W |
| Aurelia | Locale | 422 | Cherokee | 42 42 38 N | 095 26 12 W |
| Aurelia | Populated Place | 424 | Cherokee | 42 42 46 N | 095 26 12 W |
| Aurelia Country Club | Locale | 434 | Cherokee | 42 43 02 N | 095 25 41 W |
| Aurelia Fire Department | Building | 423 | Cherokee | 42 42 42 N | 095 26 10 W |
| Aurelia Medical Clinic | Hospital | 424 | Cherokee | 42 42 47 N | 095 26 13 W |
| Aurelia Police Department | Building | 424 | Cherokee | 42 42 47 N | 095 26 11 W |
| Aurelia Post Office | Post Office | 424 | Cherokee | 42 42 46 N | 095 26 13 W |
| Aurelia Public Library | Building | 424 | Cherokee | 42 42 46 N | 095 26 11 W |
| Aurelia School | School | 437 | Cherokee | 42 42 49 N | 095 25 43 W |
| Aureola | Populated Place | 297 | Floyd | 42 58 06 N | 092 52 41 W |
| Aurora | Populated Place | 347 | Buchanan | 42 37 08 N | 091 43 43 W |
| Aurora | Populated Place | 269 | Keokuk | 41 29 45 N | 092 14 23 W |
| Aurora (historical) | Locale | 346 | Buchanan | 42 37 13 N | 091 43 48 W |
| Aurora Avenue Bible Church | Church | 253 | Polk | 41 38 13 N | 093 37 06 W |
| Aurora Elevator | Locale | 346 | Buchanan | 42 37 14 N | 091 43 51 W |
| Aurora Fire Station | Building | 347 | Buchanan | 42 37 08 N | 091 43 42 W |
| Aurora Heights School | School | 288 | Jasper | 41 41 45 N | 093 01 25 W |
| Aurora Library | Building | 347 | Buchanan | 42 37 08 N | 091 43 42 W |
| Aurora Methodist Church | Church | 349 | Buchanan | 42 37 21 N | 091 43 46 W |
| Aurora Park | Park | 289 | Jasper | 41 41 55 N | 093 01 31 W |
| Aurora Post Office | Post Office | 347 | Buchanan | 42 37 08 N | 091 43 42 W |
| Aurora Post Office (historical) | Post Office | 258 | Keokuk | 41 29 46 N | 092 15 08 W |
| Austin | Locale | 316 | Fremont | 40 38 12 N | 095 38 53 W |
| Austin Cemetery | Cemetery | 312 | Fremont | 40 38 20 N | 095 39 01 W |
| Austin County Park | Park | 177 | Van Buren | 40 46 07 N | 091 58 05 W |
| Austin Post Office (historical) | Post Office | 445 | Dickinson | 43 26 42 N | 095 18 58 W |
| Austinville | Locale | 305 | Butler | 42 35 08 N | 092 57 31 W |
| Austinville | Populated Place | 305 | Butler | 42 35 09 N | 092 57 26 W |
| Austinville Elevator | Locale | 305 | Butler | 42 35 09 N | 092 57 26 W |