Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| H S Kuyper Fieldhouse | Building | 266 | Marion | 41 24 12 N | 092 55 21 W |
| Haas Chiropractic Clinic | Hospital | 348 | Cerro Gordo | 43 08 17 N | 093 12 03 W |
| Haberkorn Creek | Stream | | Dubuque | 42 35 07 N | 090 49 54 W |
| Hackberry Creek | Stream | | Ringgold | 40 51 20 N | 094 08 11 W |
| Hackberry Post Office (historical) | Post Office | 325 | Floyd | 42 59 10 N | 093 00 23 W |
| Hackett Ditch | Canal | 319 | Monona | 42 04 29 N | 096 05 15 W |
| Hacklebarney Woods County Park | Park | 358 | Montgomery | 40 59 01 N | 094 58 31 W |
| Hackney Grave | Cemetery | 243 | Wapello | 40 59 00 N | 092 15 51 W |
| Hadacek Recreation Area | Park | 369 | Winnebago | 43 18 05 N | 093 39 31 W |
| Hadden Cemetery | Cemetery | 331 | Page | 40 51 56 N | 095 16 06 W |
| Hadley Cemetery | Cemetery | 317 | Hardin | 42 16 02 N | 093 09 17 W |
| Hagemann Hall | Building | 282 | Black Hawk | 42 30 45 N | 092 27 51 W |
| Hagenson Pond | Reservoir | 177 | Clinton | 41 44 36 N | 090 21 20 W |
| Hagenson Pond Area | Park | 179 | Clinton | 41 44 38 N | 090 21 30 W |
| Hagerman Baptist Church | Church | 259 | Black Hawk | 42 29 53 N | 092 22 09 W |
| Hagerty | Populated Place | 438 | Dickinson | 43 18 47 N | 095 19 45 W |
| Hagerty | Populated Place | 292 | Monroe | 41 04 37 N | 092 51 37 W |
| Hagerty Post Office (historical) | Post Office | 428 | Dickinson | 43 17 55 N | 095 19 45 W |
| Hagge County Park | Park | 383 | Sac | 42 22 57 N | 094 59 42 W |
| Hainer Creek | Stream | | Jackson | 42 04 46 N | 090 35 29 W |
| Haines Park | Park | 292 | Polk | 41 38 45 N | 093 27 37 W |
| Haines Residence Hall | Building | 311 | Poweshiek | 41 44 54 N | 092 43 03 W |
| Hair Tech School of Cosmetology | School | 396 | Union | 41 03 30 N | 094 21 54 W |
| Haitz Ditch | Canal | 324 | Monona | 42 09 30 N | 096 02 18 W |
| Hala Cemetery | Cemetery | 260 | Johnson | 41 50 42 N | 091 49 05 W |
| Halbur | Populated Place | 429 | Carroll | 42 00 25 N | 094 58 12 W |
| Halbur (historical) | Locale | 422 | Carroll | 42 00 28 N | 094 58 29 W |
| Halbur Community Center | Building | 429 | Carroll | 42 00 25 N | 094 58 12 W |
| Halbur Post Office | Post Office | 429 | Carroll | 42 00 25 N | 094 58 12 W |
| Halbur Ridge Wildlife Area | Park | 414 | Carroll | 42 00 10 N | 094 58 46 W |
| Halburn Creek | Stream | | Carroll | 42 00 36 N | 094 57 11 W |
| Halcyon House | Hospital | 229 | Washington | 41 17 20 N | 091 41 38 W |
| Hale | Populated Place | 243 | Jones | 42 00 45 N | 091 03 34 W |
| Hale (historical) | Locale | 239 | Jones | 42 00 35 N | 091 03 34 W |
| Hale Bridge | Bridge | 227 | Jones | 42 00 16 N | 091 03 52 W |
| Hale Cemetery | Cemetery | 244 | Jones | 42 01 00 N | 091 03 37 W |
| Hale Post Office (historical) | Post Office | 243 | Jones | 42 00 45 N | 091 03 34 W |
| Hale Slough | Gut | 427 | Dickinson | 43 28 22 N | 095 03 49 W |
| Hales Slough Area | Park | 428 | Dickinson | 43 28 30 N | 095 03 49 W |
| Haley | Populated Place | 342 | Crawford | 41 54 22 N | 095 33 23 W |
| Half Breed Cemetery | Cemetery | 183 | Lee | 40 37 10 N | 091 26 21 W |
| Half Moon Lake | Lake | 158 | Des Moines | 40 42 44 N | 091 07 47 W |
| Halfa | Populated Place | 387 | Emmet | 43 21 07 N | 094 32 31 W |
| Halfa (historical) | Locale | 387 | Emmet | 43 21 07 N | 094 32 31 W |
| Halfa Post Office (historical) | Post Office | 387 | Emmet | 43 21 07 N | 094 32 31 W |
| Halferty Cemetery | Cemetery | 235 | Keokuk | 41 11 30 N | 092 03 15 W |
| Halfway Creek | Stream | | Ida | 42 30 25 N | 095 25 55 W |
| Halfway Prairie Post Office (historical) | Post Office | 224 | Monroe | 41 06 10 N | 092 43 39 W |
| Halfway Prairie School | School | 274 | Monroe | 41 05 35 N | 092 46 15 W |
| Hall Creek | Locale | 349 | Monona | 41 51 57 N | 095 51 46 W |
| Hall Creek | Stream | | Monona | 41 52 40 N | 095 53 24 W |
| Hall Creek Post Office (historical) | Post Office | 337 | Monona | 41 53 00 N | 095 52 33 W |
| Hallberg Family Practice Clinic | Hospital | 345 | Fayette | 42 40 31 N | 091 54 11 W |
| Hallmar Residential Care Center | Hospital | 221 | Linn | 41 58 28 N | 091 39 18 W |
| Hallmark Care Center | Hospital | 359 | Woodbury | 42 32 09 N | 096 22 28 W |
| Halls Lake | Lake | 164 | Louisa | 41 06 40 N | 091 04 57 W |
| Halpin | Locale | 244 | Monroe | 41 01 29 N | 092 52 35 W |
| Halsey Hall | Building | 205 | Johnson | 41 39 47 N | 091 32 13 W |
| Halverson Landing Strip | Airport | 384 | Winnebago | 43 22 28 N | 093 47 06 W |
| Halverson Park | Park | 335 | Mitchell | 43 21 15 N | 092 55 23 W |
| Ham Branch | Stream | | Appanoose | 40 51 56 N | 092 54 49 W |
| Ham House Museum | Building | 185 | Dubuque | 42 31 50 N | 090 38 50 W |
| Hamblin Cemetery | Cemetery | 297 | Delaware | 42 24 05 N | 091 25 39 W |
| Hamblin Cemetery | Cemetery | 353 | Madison | 41 13 17 N | 094 05 46 W |
| Hamburg | Locale | 277 | Fremont | 40 35 38 N | 095 39 39 W |
| Hamburg | Populated Place | 280 | Fremont | 40 36 16 N | 095 39 28 W |
| Hamburg Airport | Airport | 277 | Fremont | 40 35 55 N | 095 42 02 W |
| Hamburg Cemetery | Cemetery | 334 | Fremont | 40 37 04 N | 095 39 36 W |
| Hamburg Chiropractic Clinic | Hospital | 281 | Fremont | 40 36 18 N | 095 39 31 W |
| Hamburg City Park | Park | 280 | Fremont | 40 36 22 N | 095 39 17 W |
| Hamburg Dental Center | Hospital | 280 | Fremont | 40 36 20 N | 095 39 27 W |
| Hamburg Fire Hall | Building | 277 | Fremont | 40 36 05 N | 095 39 32 W |
| Hamburg Junior-Senior High School | School | 284 | Fremont | 40 36 18 N | 095 39 35 W |
| Hamburg Post Office | Post Office | 280 | Fremont | 40 36 17 N | 095 39 23 W |
| Hamburg Public Library | Building | 280 | Fremont | 40 36 22 N | 095 39 26 W |
| Hamburg United Methodist Church | Church | 280 | Fremont | 40 36 16 N | 095 39 28 W |
| Hamburg-Mitchell Access | Locale | 277 | Fremont | 40 36 11 N | 095 44 51 W |
| Hamerville | Populated Place | 279 | Buchanan | 42 18 45 N | 091 53 23 W |
| Hamerville Post Office (historical) | Post Office | 279 | Buchanan | 42 18 45 N | 091 53 23 W |
| Hamilton | Locale | 276 | Marion | 41 10 14 N | 092 54 11 W |
| Hamilton | Populated Place | 274 | Marion | 41 10 09 N | 092 54 12 W |
| Hamilton Cemetery | Cemetery | 329 | Decatur | 40 35 44 N | 093 44 53 W |
| Hamilton Cemetery | Cemetery | 272 | Marion | 41 10 17 N | 092 54 33 W |
| Hamilton College | School | 344 | Cerro Gordo | 43 09 10 N | 093 12 10 W |
| Hamilton County | Civil | 336 | Hamilton | 42 23 00 N | 093 43 01 W |
| Hamilton County Sheriffs Office | Building | 329 | Hamilton | 42 27 20 N | 093 48 53 W |
| Hamilton County Speedway | Locale | 309 | Hamilton | 42 27 37 N | 093 48 21 W |
| Hamilton Creek | Stream | | Lucas | 40 57 21 N | 093 27 57 W |
| Hamilton Hall | Building | 283 | Story | 42 01 40 N | 093 38 32 W |
| Hamilton Hospital | Hospital | 327 | Hamilton | 42 27 33 N | 093 49 25 W |
| Hamilton House | Building | 289 | Warren | 41 21 48 N | 093 34 01 W |
| Hamilton Memorial Lutheran Church | Church | 346 | Taylor | 40 39 59 N | 094 43 36 W |
| Hamilton Park | Park | 238 | Wapello | 41 01 52 N | 092 24 21 W |
| Hamilton Post Office | Post Office | 274 | Marion | 41 10 09 N | 092 54 12 W |
| Hamilton Technical College | School | 218 | Scott | 41 34 50 N | 090 34 02 W |
| Hamlett Cemetery | Cemetery | 333 | Clayton | 42 39 29 N | 091 18 36 W |
| Hamlin | Populated Place | 384 | Audubon | 41 40 01 N | 094 54 21 W |
| Hamlin (historical) | Locale | 384 | Audubon | 41 39 60 N | 094 54 20 W |
| Hamlin Garland Wildlife Area | Park | 355 | Mitchell | 43 23 60 N | 092 55 26 W |
| Hamlin Lutheran Church | Church | 384 | Audubon | 41 40 01 N | 094 54 21 W |
| Hamlin Post Office | Post Office | 384 | Audubon | 41 40 01 N | 094 54 21 W |
| Hamm Island | Island | 183 | Dubuque | 42 30 53 N | 090 38 39 W |
| Hammans Cemetery | Cemetery | 275 | Davis | 40 48 20 N | 092 33 11 W |
| Hammer School (historical) | School | 286 | Polk | 41 40 18 N | 093 31 16 W |
| Hammers Creek | Stream | | Grundy | 42 34 01 N | 092 33 40 W |
| Hammond Avenue Brethren Church | Church | 275 | Black Hawk | 42 28 35 N | 092 20 17 W |
| Hammond Bridge | Bridge | 222 | Marion | 41 10 40 N | 093 00 51 W |
| Hammondsburg Cemetery | Cemetery | 291 | Warren | 41 18 35 N | 093 28 34 W |
| Hammondsburgh (historical) | Populated Place | 293 | Warren | 41 18 25 N | 093 28 23 W |
| Hammondsburgh Post Office (historical) | Post Office | 293 | Warren | 41 18 25 N | 093 28 23 W |