Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Almont | Populated Place | 202 | Clinton | 41 58 31 N | 090 11 56 W |
| Almont (historical) | Locale | 203 | Clinton | 41 58 47 N | 090 11 42 W |
| Almont Post Office (historical) | Post Office | 202 | Clinton | 41 58 31 N | 090 11 56 W |
| Almoral | Populated Place | 314 | Delaware | 42 32 08 N | 091 17 24 W |
| Almoral Branch | Stream | | Delaware | 42 30 46 N | 091 16 01 W |
| Almoral Post Office (historical) | Post Office | 314 | Delaware | 42 32 08 N | 091 17 24 W |
| Almoral Siding (historical) | Populated Place | 296 | Delaware | 42 30 59 N | 091 16 22 W |
| Almoral Station Post Office (historical) | Post Office | 296 | Delaware | 42 30 59 N | 091 16 22 W |
| Alpha | Populated Place | 317 | Fayette | 42 59 48 N | 092 02 52 W |
| Alpha Cemetery | Cemetery | 326 | Fayette | 43 00 21 N | 092 02 35 W |
| Alpha Post Office (historical) | Post Office | 317 | Fayette | 42 59 48 N | 092 02 52 W |
| Alpine (historical) | Locale | 192 | Wapello | 40 57 07 N | 092 17 39 W |
| Alpine Log Church | Church | 245 | Wapello | 40 58 11 N | 092 17 42 W |
| Alpine Post Office (historical) | Post Office | 192 | Wapello | 40 57 07 N | 092 17 39 W |
| Alps Post Office (historical) | Post Office | 289 | Mills | 40 57 05 N | 095 48 53 W |
| Alt Cemetery | Cemetery | 236 | Johnson | 41 44 33 N | 091 34 21 W |
| Alta | Locale | 463 | Buena Vista | 42 40 30 N | 095 18 15 W |
| Alta | Populated Place | 454 | Buena Vista | 42 40 25 N | 095 17 26 W |
| Alta City Police Department | Building | 464 | Buena Vista | 42 40 22 N | 095 18 13 W |
| Alta Elementary School | School | 457 | Buena Vista | 42 39 55 N | 095 18 13 W |
| Alta Golf and Country Club | Locale | 450 | Buena Vista | 42 40 10 N | 095 17 46 W |
| Alta Post Office | Post Office | 464 | Buena Vista | 42 40 28 N | 095 18 20 W |
| Alta Public Library | Building | 461 | Buena Vista | 42 40 30 N | 095 17 59 W |
| Alta Senior High School | School | 463 | Buena Vista | 42 40 12 N | 095 18 17 W |
| Alta Vista | Populated Place | 351 | Chickasaw | 43 11 55 N | 092 25 02 W |
| Alta Vista (historical) | Locale | 352 | Chickasaw | 43 11 55 N | 092 24 60 W |
| Alta Vista City Hall | Building | 352 | Chickasaw | 43 11 55 N | 092 24 60 W |
| Alta Vista Post Office | Post Office | 352 | Chickasaw | 43 11 55 N | 092 24 60 W |
| Altamont Cemetery | Cemetery | 393 | Shelby | 41 33 52 N | 095 15 23 W |
| Altamont Church | Church | 397 | Shelby | 41 34 07 N | 095 15 07 W |
| Altamont Post Office (historical) | Post Office | 361 | Shelby | 41 33 25 N | 095 16 46 W |
| Alternative High School | School | 249 | Polk | 41 35 07 N | 093 42 23 W |
| Altman Cemetery | Cemetery | 229 | Keokuk | 41 10 29 N | 092 04 25 W |
| Alton | Locale | 399 | Sioux | 42 59 09 N | 096 00 30 W |
| Alton | Populated Place | 404 | Sioux | 42 59 15 N | 096 00 38 W |
| Alton Chiropractic Clinic | Hospital | 402 | Sioux | 42 59 14 N | 096 00 34 W |
| Alton County Park | Park | 392 | Sioux | 42 59 45 N | 096 00 25 W |
| Alton Fire Department | Building | 404 | Sioux | 42 59 15 N | 096 00 38 W |
| Alton Post Office | Post Office | 402 | Sioux | 42 59 14 N | 096 00 34 W |
| Alton Presbyterian Church | Church | 403 | Sioux | 42 59 24 N | 096 00 37 W |
| Alton Public Library | Building | 403 | Sioux | 42 59 12 N | 096 00 36 W |
| Alton Reformed Church | Church | 403 | Sioux | 42 59 09 N | 096 00 34 W |
| Alton School | School | 291 | Dallas | 41 50 56 N | 094 07 34 W |
| Alton School (historical) | School | 293 | Dallas | 41 49 34 N | 094 05 16 W |
| Altona Post Office (historical) | Post Office | 176 | Louisa | 41 17 13 N | 091 21 01 W |
| Altoona | Locale | 292 | Polk | 41 39 04 N | 093 27 56 W |
| Altoona | Populated Place | 291 | Polk | 41 38 39 N | 093 27 53 W |
| Altoona Assembly of God Church | Church | 293 | Polk | 41 38 38 N | 093 27 51 W |
| Altoona Cemetery | Cemetery | 280 | Polk | 41 39 28 N | 093 26 41 W |
| Altoona Christian Church | Church | 294 | Polk | 41 37 52 N | 093 27 54 W |
| Altoona City Fire Department | Building | 295 | Polk | 41 37 60 N | 093 27 53 W |
| Altoona City Hall | Building | 291 | Polk | 41 38 40 N | 093 27 36 W |
| Altoona City Public Library | Building | 288 | Polk | 41 38 40 N | 093 28 21 W |
| Altoona Community Service Campus | Building | 281 | Polk | 41 38 38 N | 093 28 53 W |
| Altoona Elementary School | School | 293 | Polk | 41 38 49 N | 093 28 04 W |
| Altoona Family Care Center | Hospital | 278 | Polk | 41 38 39 N | 093 28 51 W |
| Altoona Health Care Center | Hospital | 288 | Polk | 41 38 58 N | 093 28 20 W |
| Altoona Police Deaprtment | Building | 292 | Polk | 41 38 42 N | 093 27 53 W |
| Altoona Post Office | Post Office | 292 | Polk | 41 38 38 N | 093 27 43 W |
| Altoona Regular Baptist Church | Church | 291 | Polk | 41 38 41 N | 093 27 60 W |
| Altoona United Methodist Church | Church | 292 | Polk | 41 38 46 N | 093 28 12 W |
| Alumnae Lecture Hall | Building | 256 | Dubuque | 42 30 35 N | 090 41 24 W |
| Alumni and Development Center | Building | 291 | Polk | 41 36 04 N | 093 39 02 W |
| Alumni Campus Center | Building | 252 | Dubuque | 42 30 16 N | 090 40 46 W |
| Alumni Hall | Building | 269 | Dubuque | 42 29 54 N | 090 41 35 W |
| Alumni Hall | Building | 266 | Linn | 41 55 37 N | 091 25 28 W |
| Alumni Hall | Building | 290 | Story | 42 01 30 N | 093 38 56 W |
| Alumni Recitation Hall | Building | 311 | Poweshiek | 41 44 55 N | 092 43 19 W |
| Alverno Hall | Building | 375 | Woodbury | 42 31 36 N | 096 25 43 W |
| Alverno Health Care Facility | Hospital | 195 | Clinton | 41 51 33 N | 090 11 38 W |
| Alvord | Locale | 403 | Lyon | 43 20 32 N | 096 18 04 W |
| Alvord | Populated Place | 403 | Lyon | 43 20 32 N | 096 18 04 W |
| Alvord Feed and Supply Incorporated Elevator | Locale | 403 | Lyon | 43 20 32 N | 096 18 04 W |
| Alvord Post Office | Post Office | 403 | Lyon | 43 20 32 N | 096 18 04 W |
| Amana | Locale | 218 | Iowa | 41 47 42 N | 091 52 01 W |
| Amana | Populated Place | 226 | Iowa | 41 48 00 N | 091 52 15 W |
| Amana Airport | Airport | 218 | Iowa | 41 47 45 N | 091 52 16 W |
| Amana Arts Guild Gallery | Building | 225 | Iowa | 41 48 10 N | 091 56 31 W |
| Amana Colonies RV Park | Locale | 221 | Iowa | 41 48 10 N | 091 53 01 W |
| Amana Community Church Museum | Building | 263 | Iowa | 41 45 34 N | 091 52 02 W |
| Amana Community School | School | 231 | Iowa | 41 47 40 N | 091 54 06 W |
| Amana Family Practice Clinic | Hospital | 224 | Iowa | 41 48 00 N | 091 52 36 W |
| Amana Post Office | Post Office | 224 | Iowa | 41 48 00 N | 091 52 36 W |
| Amana Welcome Center | Building | 242 | Iowa | 41 41 08 N | 091 54 46 W |
| Amaqua Center School | School | 328 | Boone | 42 04 40 N | 094 06 19 W |
| Amarill Post Office (historical) | Post Office | 313 | Delaware | 42 34 22 N | 091 26 56 W |
| Amazon Post Office (historical) | Post Office | 332 | Madison | 41 18 30 N | 093 54 31 W |
| Ambassadors for Christ Church | Church | 266 | Black Hawk | 42 28 49 N | 092 20 50 W |
| Amber | Populated Place | 313 | Jones | 42 07 41 N | 091 10 49 W |
| Amber (historical) | Locale | 313 | Jones | 42 07 41 N | 091 10 49 W |
| Amber Cemetery | Cemetery | 322 | Jones | 42 07 48 N | 091 10 42 W |
| Amber Post Office (historical) | Post Office | 313 | Jones | 42 07 41 N | 091 10 49 W |
| Amborn-Pagin Wildlife Area | Park | 176 | Lee | 40 28 00 N | 091 31 26 W |
| Amboy (historical) | Locale | 294 | Jasper | 41 44 08 N | 092 58 46 W |
| Amboy Post Office (historical) | Post Office | 294 | Jasper | 41 44 08 N | 092 58 46 W |
| Ambrose | Populated Place | 260 | Iowa | 41 31 53 N | 092 14 01 W |
| Ambrose A Call State Park | Park | 373 | Kossuth | 43 03 07 N | 094 15 16 W |
| Ambrose A Call State Park | Park | 370 | Kossuth | 43 03 10 N | 094 14 53 W |
| Ambrose Catholic Armah Cemetery | Cemetery | 262 | Iowa | 41 31 53 N | 092 12 45 W |
| Ambrose Hall | Building | 214 | Scott | 41 32 20 N | 090 34 51 W |
| Ambrose Post Office (historical) | Post Office | 260 | Iowa | 41 31 53 N | 092 14 01 W |
| Ambrosia Cemetery | Cemetery | 193 | Lee | 40 31 27 N | 091 30 06 W |
| Ambrosia Post Office (historical) | Post Office | 207 | Lee | 40 31 28 N | 091 29 21 W |
| Ambroson Recreation Area | Park | 369 | Winnebago | 43 19 18 N | 093 38 14 W |
| Amelia House | Hospital | 320 | Pottawattamie | 41 15 33 N | 095 47 55 W |
| American Eyecare Center | Hospital | 210 | Des Moines | 40 49 35 N | 091 08 27 W |
| American Eyecare Center | Hospital | 162 | Lee | 40 37 37 N | 091 20 17 W |
| American Eyecare Center | Hospital | 188 | Lee | 40 24 29 N | 091 23 44 W |
| American Gothic House | Building | 205 | Wapello | 40 55 16 N | 092 12 46 W |
| American Institute of Business | School | 264 | Polk | 41 33 44 N | 093 38 44 W |