Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Hamms Bridge Access | Locale | 343 | Pocahontas | 42 50 54 N | 094 27 34 W |
| Hampson Hillside Park | Park | 335 | Humboldt | 42 43 09 N | 094 13 25 W |
| Hampton | Locale | 347 | Franklin | 42 44 58 N | 093 12 26 W |
| Hampton | Populated Place | 349 | Franklin | 42 44 31 N | 093 12 09 W |
| Hampton Cemetery | Cemetery | 345 | Franklin | 42 44 43 N | 093 11 52 W |
| Hampton City Hall | Building | 351 | Franklin | 42 44 32 N | 093 12 31 W |
| Hampton City Park | Park | 350 | Franklin | 42 44 29 N | 093 12 60 W |
| Hampton Country Club | Locale | 339 | Franklin | 42 46 40 N | 093 11 31 W |
| Hampton Health Care Center | Hospital | 346 | Franklin | 42 44 02 N | 093 12 19 W |
| Hampton Junior High School | School | 347 | Franklin | 42 44 36 N | 093 12 03 W |
| Hampton Municipal Airport | Airport | 354 | Franklin | 42 43 25 N | 093 13 35 W |
| Hampton Police Department | Building | 351 | Franklin | 42 44 32 N | 093 12 33 W |
| Hampton Post Office | Post Office | 350 | Franklin | 42 44 28 N | 093 12 26 W |
| Hampton Public Library | Building | 351 | Franklin | 42 44 32 N | 093 12 31 W |
| Hampton United Methodist Church | Church | 348 | Franklin | 42 44 32 N | 093 12 21 W |
| Hampton-Dumont Elementary School | School | 302 | Butler | 42 45 01 N | 092 58 16 W |
| Hampton-Dumont High School | School | 348 | Franklin | 42 45 12 N | 093 12 31 W |
| Hamptons First Resident Historical Marker | Park | 344 | Franklin | 42 44 45 N | 093 12 41 W |
| Hanawalt School | School | 281 | Polk | 41 34 48 N | 093 41 35 W |
| Hancher Auditorium | Building | 200 | Johnson | 41 40 09 N | 091 32 17 W |
| Hancock | Locale | 341 | Pottawattamie | 41 23 05 N | 095 22 04 W |
| Hancock | Populated Place | 339 | Pottawattamie | 41 23 24 N | 095 21 45 W |
| Hancock County | Civil | 381 | Hancock | 43 05 00 N | 093 43 01 W |
| Hancock County Courthouse | Building | 372 | Hancock | 43 05 50 N | 093 36 05 W |
| Hancock County Fairgrounds | Locale | 372 | Hancock | 43 05 06 N | 093 47 29 W |
| Hancock County Memorial Hospital | Hospital | 373 | Hancock | 43 05 54 N | 093 48 23 W |
| Hancock County Sheriffs Office | Building | 372 | Hancock | 43 05 50 N | 093 36 05 W |
| Hancock County Speedway | Locale | 372 | Hancock | 43 05 06 N | 093 47 29 W |
| Hancock Elevator | Locale | 339 | Pottawattamie | 41 23 24 N | 095 21 45 W |
| Hancock Post Office | Post Office | 339 | Pottawattamie | 41 23 24 N | 095 21 45 W |
| Hancock Town Hall | Building | 339 | Pottawattamie | 41 23 24 N | 095 21 45 W |
| Hancock Township Cemetery | Cemetery | 358 | Plymouth | 42 36 00 N | 096 28 51 W |
| Handorf Roadside Park | Park | 311 | Franklin | 42 44 44 N | 093 01 57 W |
| Hands Grove Township Cemetery | Cemetery | 351 | Humboldt | 42 48 50 N | 094 09 51 W |
| Handsome View Post Office (historical) | Post Office | 308 | Warren | 41 13 30 N | 093 35 11 W |
| Haneys | Locale | 290 | Mills | 40 57 60 N | 095 48 32 W |
| Hanford | Populated Place | 363 | Cerro Gordo | 43 04 27 N | 093 08 30 W |
| Hanford (historical) | Locale | 363 | Cerro Gordo | 43 04 27 N | 093 08 30 W |
| Hanford Post Office (historical) | Post Office | 363 | Cerro Gordo | 43 04 27 N | 093 08 30 W |
| Hanging Bog State Preserve | Park | 222 | Linn | 42 02 15 N | 091 46 06 W |
| Hanging Rock | Pillar | 239 | Allamakee | 43 06 30 N | 091 10 50 W |
| Hanging Rock Park | Park | 288 | Dallas | 41 34 30 N | 094 12 16 W |
| Hanley | Populated Place | 286 | Madison | 41 17 17 N | 093 50 03 W |
| Hanley (historical) | Locale | 286 | Madison | 41 17 17 N | 093 50 03 W |
| Hanley Bridge | Bridge | 262 | Polk | 41 46 48 N | 093 46 01 W |
| Hanley Post Office (historical) | Post Office | 286 | Madison | 41 17 17 N | 093 50 03 W |
| Hanlontown | Locale | 366 | Worth | 43 16 57 N | 093 22 44 W |
| Hanlontown | Populated Place | 367 | Worth | 43 16 49 N | 093 22 44 W |
| Hanlontown Elementary School | School | 366 | Worth | 43 16 40 N | 093 22 37 W |
| Hanna | Populated Place | 359 | Kossuth | 42 56 57 N | 094 01 15 W |
| Hanna (historical) | Locale | 359 | Kossuth | 42 56 57 N | 094 01 15 W |
| Hanna Park | Park | 243 | Linn | 42 01 25 N | 091 36 11 W |
| Hanna Post Office (historical) | Post Office | 359 | Kossuth | 42 56 57 N | 094 01 15 W |
| Hannen Airport | Airport | 276 | Linn | 42 13 36 N | 091 45 05 W |
| Hannen Lake | Reservoir | 250 | Benton | 41 51 48 N | 092 06 45 W |
| Hannen Lake Dam | Dam | 250 | Benton | 41 51 46 N | 092 06 44 W |
| Hannen Park | Park | 259 | Benton | 41 52 02 N | 092 06 41 W |
| Hanner Creek | Stream | | Clarke | 41 09 36 N | 093 51 18 W |
| Hannold Cemetery | Cemetery | 259 | Marion | 41 26 30 N | 092 59 41 W |
| Hanover | Populated Place | 375 | Allamakee | 43 21 39 N | 091 31 15 W |
| Hanover | Populated Place | 416 | Buena Vista | 42 36 17 N | 095 22 07 W |
| Hanover Post Office (historical) | Post Office | 375 | Allamakee | 43 21 39 N | 091 31 15 W |
| Hanover Post Office (historical) | Post Office | 418 | Buena Vista | 42 36 18 N | 095 22 06 W |
| Hanover Wildlife Area | Park | 415 | Crawford | 42 02 30 N | 095 31 46 W |
| Hansel Cemetery | Cemetery | 266 | Clayton | 42 42 24 N | 091 14 36 W |
| Hansell | Locale | 314 | Franklin | 42 45 22 N | 093 06 17 W |
| Hansell | Populated Place | 316 | Franklin | 42 45 28 N | 093 06 15 W |
| Hansell Cemetery | Cemetery | 327 | Franklin | 42 46 00 N | 093 06 18 W |
| Hansell Post Office | Post Office | 316 | Franklin | 42 45 28 N | 093 06 15 W |
| Hansell United Methodist Church | Church | 318 | Franklin | 42 45 29 N | 093 06 10 W |
| Hansen School | School | 286 | Marshall | 42 03 09 N | 092 56 36 W |
| Hansen Swamp Area | Park | 351 | Hardin | 42 30 15 N | 093 18 21 W |
| Hansen Swamp Public Hunting Area | Park | 347 | Hardin | 42 29 56 N | 093 17 01 W |
| Hansens Ford Bridge | Bridge | 219 | Allamakee | 43 22 03 N | 091 34 37 W |
| Hanson Area | Park | 369 | Worth | 43 28 45 N | 093 16 46 W |
| Hanson Cemetery | Cemetery | 226 | Davis | 40 51 00 N | 092 35 31 W |
| Hanson Lake | Reservoir | 253 | Black Hawk | 42 27 20 N | 092 17 53 W |
| Hanson Post Office (historical) | Post Office | 379 | Worth | 43 27 33 N | 093 25 06 W |
| Hanthorn Lake | Lake | 299 | Pottawattamie | 41 20 14 N | 095 54 33 W |
| Happy Acres | Park | 312 | Floyd | 43 01 25 N | 092 49 16 W |
| Happy Day School | School | 208 | Scott | 41 32 44 N | 090 36 50 W |
| Happy Hollow (historical) | Locale | 205 | Wapello | 41 03 48 N | 092 30 11 W |
| Happy Hollow Country Club | Locale | 345 | Adams | 40 58 55 N | 094 43 31 W |
| Happy Hollow Park | Park | 218 | Johnson | 41 40 15 N | 091 31 26 W |
| Happy Hollow Post Office (historical) | Post Office | 205 | Wapello | 41 03 48 N | 092 30 11 W |
| Happy Hollow School | School | 284 | Monroe | 41 00 04 N | 093 00 39 W |
| Happy Run | Stream | | Greene | 42 09 12 N | 094 26 39 W |
| Happy Siesta Nursing Home | Hospital | 415 | Plymouth | 42 48 34 N | 095 58 01 W |
| Harbor Road Park | Park | 172 | Scott | 41 30 16 N | 090 37 29 W |
| Harbor Road School (historical) | School | 169 | Scott | 41 28 24 N | 090 38 58 W |
| Harbour Cemetery | Cemetery | 259 | Davis | 40 49 53 N | 092 26 32 W |
| Harbour Post Office (historical) | Post Office | 262 | Davis | 40 49 40 N | 092 26 31 W |
| Harcourt | Populated Place | 358 | Webster | 42 15 46 N | 094 10 33 W |
| Harcourt (historical) | Locale | 357 | Webster | 42 15 53 N | 094 10 33 W |
| Harcourt Community Center | Building | 358 | Webster | 42 15 46 N | 094 10 33 W |
| Harcourt Post Office | Post Office | 358 | Webster | 42 15 46 N | 094 10 33 W |
| Harcourt Public Library | Building | 358 | Webster | 42 15 47 N | 094 10 34 W |
| Harcourt Town Hall | Building | 358 | Webster | 42 15 46 N | 094 10 33 W |
| Hard Scrabble County Park | Park | 285 | Delaware | 42 19 27 N | 091 15 43 W |
| Hard Scratch | Populated Place | 367 | Harrison | 41 36 48 N | 095 42 51 W |
| Hardemen Cemetery | Cemetery | 294 | Butler | 42 52 14 N | 092 48 06 W |
| Harder's Corner Post Office (historical) | Post Office | 298 | Page | 40 36 25 N | 094 58 21 W |
| Hardfish Access | Locale | 215 | Monroe | 41 09 38 N | 092 39 47 W |
| Hardin | Populated Place | 317 | Clayton | 43 04 49 N | 091 29 04 W |
| Hardin Cemetery | Cemetery | 350 | Allamakee | 43 05 20 N | 091 29 12 W |
| Hardin Cemetery | Cemetery | 294 | Appanoose | 40 42 13 N | 092 40 38 W |
| Hardin Cemetery | Cemetery | 339 | Webster | 42 14 28 N | 093 58 16 W |
| Hardin Church | Church | 392 | Pottawattamie | 41 15 29 N | 095 42 48 W |
| Hardin City Access Area | Locale | 325 | Hardin | 42 26 55 N | 093 06 21 W |
| Hardin City Bridge | Bridge | 298 | Hardin | 42 26 40 N | 093 07 34 W |