Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Indian Prairie District School (historical) | School | 281 | Allamakee | 43 16 30 N | 091 14 45 W |
| Indian Princess Grave | Cemetery | 162 | Lee | 40 32 13 N | 091 25 21 W |
| Indian Ridge Mobile Home Park | Populated Place | 293 | Warren | 41 21 35 N | 093 33 51 W |
| Indian Slough Wildlife Area | Park | 172 | Louisa | 41 13 50 N | 091 13 06 W |
| Indian Spring (historical) | Spring | 345 | Humboldt | 42 40 57 N | 094 16 46 W |
| Indian Springs Park | Park | 175 | Scott | 41 31 50 N | 090 32 54 W |
| Indian Valley Cemetery | Cemetery | 299 | Warren | 41 12 10 N | 093 34 36 W |
| Indian Valley School | School | 276 | Warren | 41 12 18 N | 093 34 43 W |
| Indian Village State Park | Park | 385 | O'Brien | 42 58 44 N | 095 25 37 W |
| Indiana | Populated Place | 281 | Marion | 41 12 16 N | 093 01 31 W |
| Indiana Chapel Cemetery | Cemetery | 278 | Marion | 41 12 15 N | 093 01 24 W |
| Indiana School | School | 229 | Scott | 41 36 17 N | 090 25 55 W |
| Indianapolis | Populated Place | 243 | Mahaska | 41 23 49 N | 092 26 01 W |
| Indianapolis Cemetery | Cemetery | 254 | Mahaska | 41 24 19 N | 092 26 12 W |
| Indianapolis Post Office (historical) | Post Office | 243 | Mahaska | 41 23 49 N | 092 26 01 W |
| Indianola | Populated Place | 295 | Warren | 41 21 29 N | 093 33 27 W |
| Indianola (historical) | Locale | 293 | Warren | 41 21 60 N | 093 33 11 W |
| Indianola Chiropractic Clinic | Hospital | 295 | Warren | 41 21 38 N | 093 33 49 W |
| Indianola City Cemetery | Cemetery | 289 | Warren | 41 20 54 N | 093 33 45 W |
| Indianola City Fire Department | Building | 295 | Warren | 41 21 40 N | 093 33 33 W |
| Indianola City Hall | Building | 295 | Warren | 41 21 40 N | 093 33 34 W |
| Indianola City Public Library | Building | 296 | Warren | 41 21 42 N | 093 33 51 W |
| Indianola Community Church | Church | 289 | Warren | 41 21 05 N | 093 32 21 W |
| Indianola Country Club | Locale | 271 | Warren | 41 22 47 N | 093 33 56 W |
| Indianola Friends Church | Church | 295 | Warren | 41 21 44 N | 093 33 43 W |
| Indianola Friends Church | Church | 280 | Warren | 41 22 32 N | 093 33 57 W |
| Indianola Good Samaritan Center | Hospital | 294 | Warren | 41 21 12 N | 093 33 28 W |
| Indianola Heights Christian Church | Church | 287 | Polk | 41 33 20 N | 093 36 08 W |
| Indianola Heights Evangelical Church | Church | 282 | Polk | 41 33 29 N | 093 36 04 W |
| Indianola Heliport | Airport | 296 | Warren | 41 21 35 N | 093 33 33 W |
| Indianola Junction | Populated Place | 315 | Lucas | 41 02 25 N | 093 21 24 W |
| Indianola Middle School | School | 289 | Warren | 41 21 22 N | 093 32 36 W |
| Indianola Police Department | Building | 295 | Warren | 41 21 40 N | 093 33 33 W |
| Indianola Post Office | Post Office | 292 | Warren | 41 21 32 N | 093 33 46 W |
| Indianola Regular Baptist Church | Church | 290 | Warren | 41 21 26 N | 093 32 48 W |
| Indianola Senior High School | School | 287 | Warren | 41 21 35 N | 093 32 36 W |
| Indianola Soccer/Baseball Complex | Locale | 290 | Warren | 41 21 05 N | 093 32 33 W |
| Indianola Tennis Court Complex | Locale | 290 | Warren | 41 21 05 N | 093 32 33 W |
| Indianola Vision Center | Hospital | 295 | Warren | 41 21 36 N | 093 33 44 W |
| Indiantown (historical) | Populated Place | 344 | Cass | 41 18 45 N | 095 06 29 W |
| Indoor Practice Facility | Building | 216 | Johnson | 41 39 38 N | 091 33 11 W |
| Industrial Technology Center | Building | 270 | Black Hawk | 42 30 38 N | 092 27 26 W |
| Industrial Technology Center | Building | 253 | Mahaska | 41 18 33 N | 092 38 57 W |
| Industry | Locale | 343 | Webster | 42 33 26 N | 094 05 24 W |
| Industry Post Office (historical) | Post Office | 343 | Webster | 42 33 26 N | 094 05 24 W |
| Information Technology Center | Building | 436 | Buena Vista | 42 38 32 N | 095 12 28 W |
| Ingart (historical) | Locale | 326 | Ringgold | 40 37 26 N | 094 18 18 W |
| Ingart Post Office (historical) | Post Office | 326 | Ringgold | 40 37 26 N | 094 18 18 W |
| Ingebretson Memorial Grove | Park | 337 | Franklin | 42 54 05 N | 093 15 36 W |
| Ingebretson Park | Park | 360 | Cerro Gordo | 42 56 34 N | 093 22 39 W |
| Ingemann Church | Church | 379 | Monona | 41 56 19 N | 095 55 37 W |
| Ingersoll (historical) | Locale | 259 | Dallas | 41 43 55 N | 093 49 16 W |
| Ingersoll (historical) | Populated Place | 259 | Dallas | 41 43 55 N | 093 49 16 W |
| Ingersoll Post Office (historical) | Post Office | 259 | Dallas | 41 43 55 N | 093 49 16 W |
| Ingham Lake | Lake | 386 | Emmet | 43 19 11 N | 094 42 00 W |
| Ingham Lake Camp | Locale | 394 | Emmet | 43 18 53 N | 094 42 04 W |
| Ingham Lake State Game Management Area | Park | 386 | Emmet | 43 19 10 N | 094 41 40 W |
| Ingham Post Office (historical) | Post Office | 321 | Butler | 42 52 25 N | 093 06 14 W |
| Ingham Post Office (historical) | Post Office | 332 | Franklin | 42 53 30 N | 093 03 01 W |
| Inghram Branch | Stream | | Monroe | 40 59 41 N | 092 54 26 W |
| Inghram Cemetery | Cemetery | 267 | Monroe | 40 58 19 N | 092 53 18 W |
| Ingleside (historical) | Locale | 368 | Woodbury | 42 30 45 N | 096 24 01 W |
| Ingleville | Locale | 430 | Clay | 43 04 16 N | 095 19 58 W |
| Ingleville Post Office (historical) | Post Office | 430 | Clay | 43 04 16 N | 095 19 58 W |
| Ingraham Center School | School | 345 | Mills | 41 07 00 N | 095 36 48 W |
| Inis Grove Park | Park | 288 | Story | 42 02 50 N | 093 36 46 W |
| Injury Care Clinic | Hospital | 340 | Woodbury | 42 30 41 N | 096 25 06 W |
| Ink Pond | Lake | 263 | Linn | 41 55 25 N | 091 25 30 W |
| Inkpaduta Historical Marker | Park | 335 | Woodbury | 42 15 18 N | 095 55 29 W |
| Inkpaduta River Access | Locale | 326 | Woodbury | 42 15 18 N | 095 55 19 W |
| Inland | Locale | 237 | Cedar | 41 45 25 N | 090 55 41 W |
| Inland Cemetery | Cemetery | 241 | Cedar | 41 45 34 N | 090 55 40 W |
| Inland Post Office (historical) | Post Office | 226 | Cedar | 41 45 15 N | 090 54 26 W |
| Inman School | School | 325 | Montgomery | 41 01 11 N | 095 13 21 W |
| Inskeep Cemetery | Cemetery | 258 | Davis | 40 37 54 N | 092 24 49 W |
| Institute for Character Development | Building | 291 | Polk | 41 36 04 N | 093 39 02 W |
| Institute for Rural and Environmental Health | Building | 248 | Johnson | 41 42 26 N | 091 36 18 W |
| Integra Health Center | Hospital | 277 | Black Hawk | 42 28 09 N | 092 23 01 W |
| Interchange 1 | Crossing | 277 | Fremont | 40 36 03 N | 095 40 40 W |
| Interchange 1 | Crossing | 302 | Pottawattamie | 41 20 48 N | 095 56 09 W |
| Interchange 1 | Crossing | 229 | Scott | 41 35 30 N | 090 40 31 W |
| Interchange 10 | Crossing | 281 | Fremont | 40 41 21 N | 095 46 59 W |
| Interchange 10 | Crossing | 248 | Johnson | 41 50 53 N | 091 40 02 W |
| Interchange 100 | Crossing | 327 | Dallas | 41 30 50 N | 094 11 45 W |
| Interchange 102 | Crossing | 307 | Story | 41 52 40 N | 093 34 16 W |
| Interchange 104 | Crossing | 310 | Dallas | 41 31 04 N | 094 07 24 W |
| Interchange 105 | Crossing | 318 | Monona | 41 55 50 N | 096 06 13 W |
| Interchange 106 | Crossing | 325 | Dallas | 41 31 12 N | 094 04 40 W |
| Interchange 110 | Crossing | 298 | Dallas | 41 32 26 N | 094 00 46 W |
| Interchange 111 | Crossing | 273 | Story | 42 00 28 N | 093 34 17 W |
| Interchange 112 | Crossing | 321 | Monona | 42 01 36 N | 096 07 56 W |
| Interchange 113 | Crossing | 272 | Dallas | 41 32 52 N | 093 57 15 W |
| Interchange 113 | Crossing | 297 | Story | 42 02 05 N | 093 34 13 W |
| Interchange 116 | Crossing | 323 | Story | 42 04 41 N | 093 34 01 W |
| Interchange 117 | Crossing | 304 | Dallas | 41 33 46 N | 093 52 51 W |
| Interchange 12 | Crossing | 341 | Decatur | 40 44 20 N | 093 50 36 W |
| Interchange 120 | Crossing | 326 | Monona | 42 07 40 N | 096 12 16 W |
| Interchange 121 | Crossing | 301 | Dallas | 41 35 30 N | 093 48 32 W |
| Interchange 123 | Crossing | 296 | Polk | 41 35 31 N | 093 46 39 W |
| Interchange 123 | Crossing | 302 | Story | 42 09 59 N | 093 34 13 W |
| Interchange 124 | Crossing | 289 | Polk | 41 36 02 N | 093 46 36 W |
| Interchange 124 | Crossing | 308 | Story | 42 11 16 N | 093 34 13 W |
| Interchange 125 | Crossing | 273 | Polk | 41 36 54 N | 093 46 36 W |
| Interchange 126 | Crossing | 301 | Polk | 41 37 46 N | 093 46 37 W |
| Interchange 127 | Crossing | 296 | Polk | 41 38 58 N | 093 46 21 W |
| Interchange 127 | Crossing | 330 | Woodbury | 42 13 45 N | 096 14 31 W |
| Interchange 128 | Crossing | 310 | Hamilton | 42 14 19 N | 093 34 16 W |
| Interchange 129 | Crossing | 294 | Polk | 41 39 08 N | 093 44 11 W |
| Interchange 13 | Crossing | 256 | Linn | 41 53 26 N | 091 40 16 W |
| Interchange 131 | Crossing | 246 | Polk | 41 39 08 N | 093 41 51 W |