Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Hillsdale Post Office (historical) | Post Office | 373 | Mills | 41 00 27 N | 095 40 15 W |
| Hillsdale United Methodist Church | Church | 377 | Mills | 41 00 28 N | 095 40 10 W |
| Hillside Bible Church | Church | 225 | Mahaska | 41 17 45 N | 092 36 51 W |
| Hillside Cemetery | Cemetery | 266 | Black Hawk | 42 33 45 N | 092 26 44 W |
| Hillside Cemetery | Cemetery | 302 | Floyd | 42 57 30 N | 092 52 01 W |
| Hillside Cemetery | Cemetery | 333 | Franklin | 42 54 02 N | 093 12 04 W |
| Hillside Cemetery | Cemetery | 407 | Lyon | 43 16 22 N | 096 15 28 W |
| Hillside Cemetery | Cemetery | 432 | Lyon | 43 27 18 N | 096 19 51 W |
| Hillside Cemetery | Cemetery | 310 | Marshall | 42 01 44 N | 093 09 51 W |
| Hillside Cemetery | Cemetery | 351 | Montgomery | 41 08 27 N | 095 09 17 W |
| Hillside Cemetery | Cemetery | 382 | Plymouth | 42 43 45 N | 096 15 17 W |
| Hillside Cemetery | Cemetery | 373 | Winneshiek | 43 08 50 N | 091 44 51 W |
| Hillside Christian School | School | 236 | Johnson | 41 41 18 N | 091 34 56 W |
| Hillside Church | Church | 347 | Woodbury | 42 29 31 N | 095 47 58 W |
| Hillside Church of Christ | Church | 292 | Marshall | 42 01 18 N | 092 54 46 W |
| Hillside Courts | Building | 269 | Black Hawk | 42 30 27 N | 092 27 19 W |
| Hillside Golf Club | Locale | 375 | Hancock | 43 05 30 N | 093 55 41 W |
| Hillside Missionary Church | Church | 316 | Page | 40 43 52 N | 095 02 16 W |
| Hillside Wesleyan Church | Church | 244 | Linn | 41 58 13 N | 091 42 25 W |
| Hilltop | Populated Place | 259 | Black Hawk | 42 28 34 N | 092 16 14 W |
| Hilltop Care Center | Hospital | 390 | Cherokee | 42 45 31 N | 095 33 03 W |
| Hilltop Care Center | Hospital | 451 | Dickinson | 43 25 17 N | 095 07 20 W |
| Hilltop Manor | Hospital | 259 | Marion | 41 24 46 N | 092 54 42 W |
| Hilltop Manor South | Hospital | 256 | Marion | 41 24 44 N | 092 54 42 W |
| Hilltop Mobile Home Park | Populated Place | 201 | Johnson | 41 38 23 N | 091 31 38 W |
| Hilltop School | School | 326 | Hamilton | 42 28 02 N | 093 48 21 W |
| Hilltop View School | School | 306 | Buchanan | 42 35 08 N | 091 57 16 W |
| Hilltown Cemetery | Cemetery | 283 | Appanoose | 40 35 57 N | 092 42 19 W |
| Hilltown Church | Church | 288 | Appanoose | 40 35 58 N | 092 42 13 W |
| Hillview Recreation Area | Park | 396 | Plymouth | 42 38 30 N | 096 19 31 W |
| Hilton (historical) | Locale | 294 | Monroe | 40 57 42 N | 092 47 49 W |
| Hilton Coliseum | Building | 273 | Story | 42 01 16 N | 093 38 06 W |
| Hilton Creek | Stream | | Iowa | 41 47 42 N | 092 00 49 W |
| Hilton Post Office (historical) | Post Office | 294 | Monroe | 40 57 42 N | 092 47 49 W |
| Hilton School | School | 299 | Monroe | 40 57 30 N | 092 49 22 W |
| Hindman-Hobbs Center | Building | 377 | Woodbury | 42 28 33 N | 096 21 41 W |
| Hine Creek | Stream | | Kossuth | 42 54 34 N | 094 18 01 W |
| Hinkle Creek | Stream | | Benton | 42 10 22 N | 092 01 34 W |
| Hinkleville Foot Post Office (historical) | Post Office | 233 | Keokuk | 41 30 43 N | 091 52 58 W |
| Hinsdale (historical) | Locale | 170 | Lee | 40 30 30 N | 091 36 31 W |
| Hinsdale Post Office (historical) | Post Office | 170 | Lee | 40 30 30 N | 091 36 31 W |
| Hinson Family Plot | Cemetery | 161 | Des Moines | 40 58 40 N | 091 02 01 W |
| Hinton | Locale | 349 | Plymouth | 42 37 40 N | 096 17 29 W |
| Hinton | Populated Place | 350 | Plymouth | 42 37 40 N | 096 17 30 W |
| Hinton Community School | School | 373 | Plymouth | 42 37 32 N | 096 17 46 W |
| Hinton Fire Department | Building | 350 | Plymouth | 42 37 40 N | 096 17 30 W |
| Hinton Post Office | Post Office | 350 | Plymouth | 42 37 40 N | 096 17 30 W |
| Hirondelle Post Office (historical) | Post Office | 363 | Worth | 43 16 40 N | 093 21 36 W |
| Hism Cemetery | Cemetery | 306 | Appanoose | 40 39 36 N | 092 51 09 W |
| Hispanic Cultural Center | Building | 294 | Polk | 41 35 57 N | 093 39 13 W |
| Hispanic Ministry | Church | 240 | Linn | 41 59 53 N | 091 39 30 W |
| Hissem Cemetery | Cemetery | 241 | Van Buren | 40 48 11 N | 092 09 32 W |
| Historic Amana Colonies State Historical Marker | Park | 281 | Iowa | 41 41 42 N | 092 13 49 W |
| Historic Amana Colonies State Historical Marker | Park | 215 | Johnson | 41 41 42 N | 091 40 50 W |
| Historic Black Hawk County State Historical Marker | Park | 268 | Black Hawk | 42 25 15 N | 092 26 26 W |
| Historic Cedar Falls State Historical Marker | Park | 265 | Black Hawk | 42 32 18 N | 092 26 56 W |
| Historic Council Bluffs State Historical Marker | Park | 326 | Pottawattamie | 41 24 15 N | 095 39 31 W |
| Historic Council Bluffs State Historical Marker | Park | 330 | Pottawattamie | 41 24 05 N | 095 39 29 W |
| Historic Davenport State Historical Marker | Park | 226 | Scott | 41 35 51 N | 090 28 45 W |
| Historic Davenport State Historical Marker | Park | 226 | Scott | 41 35 44 N | 090 29 25 W |
| Historic Des Moines State Historical Marker | Park | 282 | Polk | 41 45 11 N | 093 34 28 W |
| Historic Des Moines State Historical Marker | Park | 293 | Polk | 41 40 52 N | 093 23 26 W |
| Historic General Dodge House | Building | 323 | Pottawattamie | 41 15 19 N | 095 50 52 W |
| Historic Grinnell State Historical Marker | Park | 291 | Jasper | 41 41 40 N | 092 46 26 W |
| Historic Iowa City STate Historical Marker | Park | 230 | Cedar | 41 38 31 N | 091 03 18 W |
| Historic Iowa City State Historical Marker | Park | 220 | Johnson | 41 41 37 N | 091 40 57 W |
| Historic Northern Iowa State Historical Marker | Park | 378 | Cerro Gordo | 43 10 33 N | 093 21 16 W |
| Historic Old Brewery | Building | 201 | Clayton | 42 47 30 N | 091 06 23 W |
| Historic Pella State Historical Marker | Park | 264 | Marion | 41 24 25 N | 092 55 42 W |
| Historic School Museum | Building | 422 | Lyon | 43 23 07 N | 096 28 11 W |
| Historic Sioux City State Historical Marker | Park | 341 | Woodbury | 42 28 57 N | 095 47 21 W |
| Historic Squirrel Cage Jail | Building | 304 | Pottawattamie | 41 15 30 N | 095 51 08 W |
| Historical and Coal Mining Museum | Building | 305 | Appanoose | 40 43 56 N | 092 52 29 W |
| Historical Museum of Boone County | Building | 346 | Boone | 42 03 59 N | 093 52 47 W |
| Historical Village Museum | Building | 269 | Marion | 41 24 23 N | 092 54 51 W |
| History / Political Science House | Building | 265 | Polk | 41 37 16 N | 093 36 16 W |
| History Center | Building | 232 | Linn | 41 58 52 N | 091 39 49 W |
| Hitchcock House | Building | 358 | Cass | 41 18 15 N | 095 06 11 W |
| Hitchcock Nature Area | Park | 363 | Pottawattamie | 41 25 00 N | 095 51 41 W |
| Hitchcock Park | Park | 358 | Cass | 41 18 15 N | 095 06 11 W |
| Hite Cemetery | Cemetery | 326 | Monona | 42 08 20 N | 096 12 18 W |
| Hiteman | Populated Place | 238 | Monroe | 41 03 32 N | 092 53 32 W |
| Hiteman (historical) | Locale | 238 | Monroe | 41 03 32 N | 092 53 32 W |
| Hiteman Cemetery | Cemetery | 254 | Monroe | 41 03 31 N | 092 54 40 W |
| Hiteman Mine Number 10 | Mine | 255 | Monroe | 41 04 06 N | 092 55 39 W |
| Hiteman Post Office (historical) | Post Office | 238 | Monroe | 41 03 32 N | 092 53 32 W |
| Hitesville Cemetery | Cemetery | 316 | Butler | 42 40 17 N | 092 52 41 W |
| Hitesville Gospel Hall | Church | 312 | Butler | 42 40 19 N | 092 52 42 W |
| Hitesville Post Office (historical) | Post Office | 308 | Butler | 42 40 20 N | 092 53 56 W |
| Hitters Park | Park | 228 | Linn | 41 58 33 N | 091 33 11 W |
| Hixite Cemetery | Cemetery | 302 | Marshall | 42 04 43 N | 093 00 52 W |
| HLV School | School | 257 | Iowa | 41 43 48 N | 092 17 42 W |
| HM Perry School | School | 181 | Scott | 41 29 22 N | 090 38 58 W |
| Hmong Alliance Fellowship | Church | 257 | Marion | 41 24 33 N | 092 54 39 W |
| Hoaglan Woods Recreation Area | Park | 201 | Henry | 40 51 25 N | 091 42 01 W |
| Hoak School | School | 288 | Polk | 41 32 30 N | 093 38 28 W |
| Hobart Post Office (historical) | Post Office | 371 | Kossuth | 43 04 14 N | 094 16 56 W |
| Hobart Wildlife Area | Park | 314 | Greene | 42 05 50 N | 094 34 36 W |
| Hobarton | Locale | 371 | Kossuth | 43 04 14 N | 094 16 56 W |
| Hobarton | Populated Place | 371 | Kossuth | 43 04 14 N | 094 16 56 W |
| Hobarton Post Office (historical) | Post Office | 371 | Kossuth | 43 04 14 N | 094 16 56 W |
| Hobbs County Park | Park | 326 | Carroll | 42 10 04 N | 094 42 49 W |
| Hobo Museum | Building | 374 | Hancock | 43 05 46 N | 093 48 05 W |
| Hochreider Cemetery | Cemetery | 206 | Henry | 41 08 30 N | 091 26 11 W |
| Hochstetler Cemetery | Cemetery | 243 | Johnson | 41 33 10 N | 091 44 31 W |
| Hocker Estates Mobile Home Park | Populated Place | 201 | Lee | 40 25 15 N | 091 24 33 W |
| Hockeys Slough | Stream | | Johnson | 41 28 38 N | 091 16 40 W |
| Hocking | Populated Place | 261 | Monroe | 40 59 27 N | 092 49 14 W |
| Hocking (historical) | Locale | 261 | Monroe | 40 59 27 N | 092 49 14 W |
| Hocking Post Office (historical) | Post Office | 261 | Monroe | 40 59 27 N | 092 49 14 W |