Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Immanuel Lutheran Church | Church | 354 | Mitchell | 43 22 38 N | 092 55 19 W |
| Immanuel Lutheran Church | Church | 369 | Page | 40 48 44 N | 095 04 48 W |
| Immanuel Lutheran Church | Church | 350 | Plymouth | 42 49 37 N | 096 33 31 W |
| Immanuel Lutheran Church | Church | 311 | Poweshiek | 41 45 13 N | 092 44 06 W |
| Immanuel Lutheran Church | Church | 404 | Shelby | 41 39 08 N | 095 20 02 W |
| Immanuel Lutheran Church | Church | 305 | Story | 42 11 15 N | 093 35 31 W |
| Immanuel Lutheran Church | Church | 229 | Washington | 41 17 55 N | 091 40 40 W |
| Immanuel Lutheran Church | Church | 347 | Webster | 42 20 45 N | 094 06 25 W |
| Immanuel Lutheran Church | Church | 382 | Winnebago | 43 28 14 N | 093 37 04 W |
| Immanuel Lutheran Church | Church | 356 | Woodbury | 42 29 59 N | 096 25 19 W |
| Immanuel Lutheran Church Cemetery | Cemetery | 360 | Hancock | 43 15 17 N | 093 58 12 W |
| Immanuel Memorial Church | Church | 341 | Hardin | 42 31 15 N | 093 22 46 W |
| Immanuel Presbyterian Church | Church | 269 | Black Hawk | 42 28 52 N | 092 20 15 W |
| Immanuel Reform Church | Church | 373 | Hancock | 43 00 33 N | 093 35 59 W |
| Immanuel Reformed Cemetery | Cemetery | 421 | Sac | 42 32 23 N | 095 13 47 W |
| Immanuel Reformed Cemetery | Cemetery | 375 | Wright | 42 51 50 N | 093 32 56 W |
| Immanuel Reformed Church | Church | 423 | Sac | 42 32 26 N | 095 13 46 W |
| Immanuel Reformed Church | Church | 375 | Wright | 42 51 50 N | 093 32 54 W |
| Immanuel School | School | 259 | Black Hawk | 42 30 15 N | 092 20 14 W |
| Immanuel School | School | 308 | Bremer | 42 39 41 N | 092 14 19 W |
| Immanuel School | School | 377 | Carroll | 42 07 40 N | 094 46 55 W |
| Immanuel School | School | 367 | Page | 40 48 39 N | 095 04 46 W |
| Immanuel Southern Baptist Church | Church | 286 | Black Hawk | 42 29 55 N | 092 24 36 W |
| Immanuel United Church of Christ | Church | 286 | Butler | 42 47 01 N | 092 39 58 W |
| Immanuel United Church of Christ | Church | 380 | Franklin | 42 45 35 N | 093 22 01 W |
| Immanuel United Methodist Church | Church | 295 | Polk | 41 37 15 N | 093 41 08 W |
| Imogene | Populated Place | 335 | Fremont | 40 52 46 N | 095 25 37 W |
| Imogene (historical) | Locale | 335 | Fremont | 40 52 46 N | 095 25 37 W |
| Imogene Fire Department | Building | 335 | Fremont | 40 52 46 N | 095 25 37 W |
| Imogene Post Office | Post Office | 335 | Fremont | 40 52 46 N | 095 25 37 W |
| Imogene Town Hall | Building | 335 | Fremont | 40 52 46 N | 095 25 37 W |
| Impassable Marsh (historical) | Swamp | 344 | Humboldt | 42 44 15 N | 094 02 26 W |
| Incline Post Office (historical) | Post Office | 323 | Boone | 42 04 10 N | 093 56 26 W |
| Independence | Locale | 281 | Buchanan | 42 28 40 N | 091 53 33 W |
| Independence | Populated Place | 285 | Buchanan | 42 28 07 N | 091 53 22 W |
| Independence Cemetery | Cemetery | 297 | Jasper | 41 47 36 N | 093 08 32 W |
| Independence City Hall | Building | 284 | Buchanan | 42 28 05 N | 091 53 26 W |
| Independence City Police Department | Building | 290 | Buchanan | 42 28 14 N | 091 53 19 W |
| Independence Fire Station | Building | 284 | Buchanan | 42 28 06 N | 091 53 26 W |
| Independence High School | School | 281 | Buchanan | 42 27 50 N | 091 53 20 W |
| Independence Motor Speedway | Locale | 287 | Buchanan | 42 28 48 N | 091 52 46 W |
| Independence Municipal Airport | Airport | 295 | Buchanan | 42 27 13 N | 091 56 51 W |
| Independence Post Office | Post Office | 279 | Buchanan | 42 28 12 N | 091 53 35 W |
| Independence Public Library | Building | 279 | Buchanan | 42 28 15 N | 091 53 35 W |
| Independence State Hospital | Hospital | 294 | Buchanan | 42 27 25 N | 091 55 35 W |
| Independence United Methodist Church | Church | 284 | Buchanan | 42 28 03 N | 091 53 26 W |
| Independent Bible Church | Church | 333 | Decatur | 40 44 12 N | 093 44 45 W |
| Independent Bible Church | Church | 223 | Henry | 41 09 01 N | 091 39 38 W |
| Independent Bible Church | Church | 196 | Louisa | 41 16 45 N | 091 21 45 W |
| Independent Bible Church | Church | 260 | Marion | 41 12 18 N | 092 52 58 W |
| Independent Church | Church | 179 | Scott | 41 27 37 N | 090 48 40 W |
| Independent District of Center School (historical) | School | 338 | Fayette | 42 41 10 N | 091 39 60 W |
| Independent District Pleasant Prairie School (historical) | School | 355 | Fayette | 42 43 13 N | 091 36 42 W |
| Independent Full Gospel Church | Church | 184 | Louisa | 41 16 48 N | 091 21 39 W |
| Independent Neurologic Consultants Center | Hospital | 359 | Woodbury | 42 29 52 N | 096 24 06 W |
| Independent Order of Odd Fellows Cemetery | Cemetery | 354 | Allamakee | 43 10 42 N | 091 22 25 W |
| Independent Order of Odd Fellows Cemetery | Cemetery | 344 | Cerro Gordo | 43 09 13 N | 093 12 04 W |
| Independent Order of Odd Fellows Cemetery | Cemetery | 255 | Tama | 41 55 38 N | 092 23 28 W |
| Independent Order of Odd Fellows Cemetery | Cemetery | 288 | Warren | 41 20 57 N | 093 33 31 W |
| Independent Pentecostal Church | Church | 202 | Muscatine | 41 34 13 N | 091 15 15 W |
| Independent School | School | 165 | Lee | 40 29 57 N | 091 35 47 W |
| Indian Bluffs State Wildlife Management Area | Area | 262 | Jones | 42 13 00 N | 091 04 37 W |
| Indian Burial Ground | Cemetery | 353 | Montgomery | 41 05 50 N | 094 58 31 W |
| Indian Cemetery | Cemetery | 306 | Benton | 42 06 00 N | 092 07 01 W |
| Indian Creek | Stream | | Black Hawk | 42 23 50 N | 092 13 00 W |
| Indian Creek | Stream | | Cass | 41 17 49 N | 095 07 33 W |
| Indian Creek | Stream | | Humboldt | 42 40 35 N | 094 12 48 W |
| Indian Creek | Stream | | Linn | 41 57 55 N | 091 34 51 W |
| Indian Creek | Stream | | Louisa | 41 13 53 N | 091 14 13 W |
| Indian Creek | Stream | | Lucas | 41 05 38 N | 093 23 20 W |
| Indian Creek | Stream | | Mills | 41 01 55 N | 095 30 27 W |
| Indian Creek | Stream | | Plymouth | 42 53 24 N | 096 31 33 W |
| Indian Creek | Stream | | Pottawattamie | 41 11 21 N | 095 52 24 W |
| Indian Creek | Stream | | Ringgold | 40 51 57 N | 094 18 04 W |
| Indian Creek | Stream | | Sac | 42 20 07 N | 094 59 02 W |
| Indian Creek | Stream | | Tama | 41 59 16 N | 092 42 10 W |
| Indian Creek | Stream | | Union | 40 59 42 N | 094 10 49 W |
| Indian Creek | Stream | | Washington | 41 12 49 N | 091 49 16 W |
| Indian Creek Bridge | Bridge | 218 | Linn | 41 59 15 N | 091 34 43 W |
| Indian Creek Bridge Two | Bridge | 213 | Linn | 41 58 00 N | 091 34 51 W |
| Indian Creek Cemetery | Cemetery | 180 | Louisa | 41 15 19 N | 091 15 35 W |
| Indian Creek Country Club | Locale | 246 | Linn | 42 02 48 N | 091 35 36 W |
| Indian Creek Country Club | Locale | 296 | Story | 41 58 33 N | 093 26 44 W |
| Indian Creek Ditch | Canal | 295 | Pottawattamie | 41 13 33 N | 095 52 05 W |
| Indian Creek Nature Center | Locale | 222 | Linn | 41 57 58 N | 091 34 46 W |
| Indian Creek Park | Park | 218 | Linn | 41 58 50 N | 091 34 31 W |
| Indian Creek Post Office (historical) | Post Office | 332 | Mills | 41 00 23 N | 095 26 34 W |
| Indian Creek School | School | 242 | Linn | 42 03 05 N | 091 35 32 W |
| Indian Creek Wildlife Area | Park | 338 | Cass | 41 19 15 N | 095 07 56 W |
| Indian Graveyard | Cemetery | 327 | Montgomery | 41 05 45 N | 095 11 01 W |
| Indian Hills Center | Building | 253 | Mahaska | 41 18 31 N | 092 38 43 W |
| Indian Hills Community College | School | 278 | Appanoose | 40 44 30 N | 092 53 16 W |
| Indian Hills Community College | School | 315 | Lucas | 41 00 20 N | 093 17 31 W |
| Indian Hills Community College | School | 251 | Wapello | 41 02 41 N | 092 23 41 W |
| Indian Hills Country Club | Locale | 177 | Louisa | 41 07 10 N | 091 11 31 W |
| Indian Hills Golf Club | Locale | 443 | Dickinson | 43 25 40 N | 095 09 26 W |
| Indian Hills Junior High School | School | 261 | Polk | 41 36 15 N | 093 44 51 W |
| Indian Hills Medical Clinic | Hospital | 358 | Woodbury | 42 32 13 N | 096 22 33 W |
| Indian Hills Nursing and Rehabilitation Center | Hospital | 410 | Woodbury | 42 32 02 N | 096 23 12 W |
| Indian Hills Nursing Center | Hospital | 328 | Pottawattamie | 41 15 42 N | 095 48 57 W |
| Indian Hills Park | Park | 307 | Pottawattamie | 41 16 13 N | 095 48 38 W |
| Indian Hills Park | Park | 372 | Woodbury | 42 31 55 N | 096 22 41 W |
| Indian Hills Recreation Area | Park | 248 | Black Hawk | 42 19 15 N | 092 08 48 W |
| Indian Hollow | Valley | | Mills | 41 06 25 N | 095 49 05 W |
| Indian Lake | Lake | 168 | Van Buren | 40 37 49 N | 091 45 17 W |
| Indian Lake (historical) | Locale | 417 | Sac | 42 26 18 N | 095 05 14 W |
| Indian Lake Park | Park | 169 | Van Buren | 40 37 48 N | 091 45 02 W |
| Indian Lake Park Trail | Trail | 174 | Van Buren | 40 37 50 N | 091 44 56 W |
| Indian Mound Cemetery | Cemetery | 343 | Humboldt | 42 41 17 N | 094 12 28 W |
| Indian Path Park | Park | 181 | Lee | 40 43 25 N | 091 14 11 W |