Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Grovers Meadow | Park | 329 | Cerro Gordo | 43 07 15 N | 093 01 36 W |
| Groves Cemetery | Cemetery | 204 | Van Buren | 40 45 46 N | 092 06 48 W |
| Grubb Run | Stream | | Jefferson | 40 59 47 N | 092 03 22 W |
| Gruis Recreation Area | Park | 362 | Winnebago | 43 17 05 N | 093 56 01 W |
| Grundy Care Center | Hospital | 308 | Grundy | 42 21 29 N | 092 45 45 W |
| Grundy Center | Populated Place | 312 | Grundy | 42 21 42 N | 092 46 07 W |
| Grundy Center (historical) | Locale | 300 | Grundy | 42 22 06 N | 092 46 17 W |
| Grundy Center Cemetery | Cemetery | 320 | Grundy | 42 21 51 N | 092 47 20 W |
| Grundy Center Elementary School | School | 317 | Grundy | 42 21 33 N | 092 46 35 W |
| Grundy Center Fire Department | Building | 311 | Grundy | 42 21 46 N | 092 46 21 W |
| Grundy Center High School | School | 305 | Grundy | 42 21 18 N | 092 46 39 W |
| Grundy Center Library | Building | 314 | Grundy | 42 21 38 N | 092 46 21 W |
| Grundy Center Municipal Airport | Airport | 323 | Grundy | 42 21 03 N | 092 50 37 W |
| Grundy Center Police Department | Building | 311 | Grundy | 42 21 46 N | 092 46 21 W |
| Grundy Center Post Office | Post Office | 311 | Grundy | 42 21 46 N | 092 46 19 W |
| Grundy City Hall | Building | 311 | Grundy | 42 21 46 N | 092 46 21 W |
| Grundy County | Civil | 307 | Grundy | 42 24 00 N | 092 48 01 W |
| Grundy County Courthouse | Building | 314 | Grundy | 42 21 40 N | 092 46 24 W |
| Grundy County Memorial Hospital | Hospital | 311 | Grundy | 42 21 34 N | 092 45 43 W |
| Grundy County Museum | Building | 292 | Grundy | 42 20 30 N | 092 40 31 W |
| Grundy County Sheriff Office | Building | 314 | Grundy | 42 21 40 N | 092 46 27 W |
| Grundy Hall | Building | 277 | Black Hawk | 42 25 50 N | 092 19 41 W |
| Grundy Medical Center | Hospital | 306 | Grundy | 42 21 40 N | 092 45 41 W |
| Grundy Medical Center | Hospital | 311 | Grundy | 42 21 34 N | 092 45 43 W |
| Gruver | Locale | 398 | Emmet | 43 23 32 N | 094 42 18 W |
| Gruver | Populated Place | 397 | Emmet | 43 23 36 N | 094 42 19 W |
| Gruver Post Office | Post Office | 397 | Emmet | 43 23 36 N | 094 42 11 W |
| Grytte Post Office (historical) | Post Office | 385 | Winnebago | 43 25 50 N | 093 38 11 W |
| Guadalupe Chapel | Church | 240 | Polk | 41 34 55 N | 093 36 13 W |
| Guard Lake | Lake | 314 | Monona | 41 59 19 N | 096 06 18 W |
| Guardian Angel Roadside Chapel | Church | 372 | Cerro Gordo | 43 07 60 N | 093 21 36 W |
| Guardian Family Care | Hospital | 181 | Scott | 41 35 53 N | 090 20 38 W |
| Guernsey | Populated Place | 251 | Poweshiek | 41 38 55 N | 092 20 34 W |
| Guernsey (historical) | Locale | 251 | Poweshiek | 41 38 55 N | 092 20 34 W |
| Guernsey Cemetery | Cemetery | 272 | Poweshiek | 41 37 50 N | 092 20 12 W |
| Guernsey Methodist Church | Church | 251 | Poweshiek | 41 38 55 N | 092 20 34 W |
| Guernsey Post Office (historical) | Post Office | 251 | Poweshiek | 41 38 55 N | 092 20 34 W |
| Gull Point | Cape | 426 | Dickinson | 43 22 15 N | 095 09 32 W |
| Gull Point State Park | Park | 430 | Dickinson | 43 22 16 N | 095 09 54 W |
| Gullion Cemetery | Cemetery | 281 | Marion | 41 12 55 N | 093 01 01 W |
| Gun Chute | Stream | | Des Moines | 41 01 07 N | 090 57 46 W |
| Gun Club Corner | Park | 356 | Wright | 42 39 60 N | 093 30 39 W |
| Gun Shot Hill | Summit | 381 | Sac | 42 17 55 N | 095 02 23 W |
| Gunder | Populated Place | 338 | Clayton | 42 58 18 N | 091 30 48 W |
| Gunder Post Office (historical) | Post Office | 338 | Clayton | 42 58 18 N | 091 30 48 W |
| Gundersen Lutheran Vision Center | Hospital | 200 | Allamakee | 43 21 42 N | 091 12 58 W |
| Gundersen Vision Center | Hospital | 378 | Allamakee | 43 16 14 N | 091 28 39 W |
| Gunderson Clinic | Hospital | 383 | Winneshiek | 43 10 59 N | 091 51 54 W |
| Gunderson Clinic - Decorah | Hospital | 267 | Winneshiek | 43 17 41 N | 091 46 21 W |
| Gunderson Clinic - Fayette | Hospital | 305 | Fayette | 42 50 39 N | 091 48 13 W |
| Gunderson Clinic - Ossian | Hospital | 385 | Winneshiek | 43 08 44 N | 091 45 49 W |
| Gunderson Clinic - West Union | Hospital | 359 | Fayette | 42 58 06 N | 091 48 36 W |
| Gunderson Clinic Oral Surgery | Hospital | 270 | Winneshiek | 43 18 13 N | 091 47 13 W |
| Gunderson Lutheran Medical Clinic | Hospital | 218 | Clayton | 43 01 06 N | 091 10 59 W |
| Gunderson Lutheran Podiatry Center | Hospital | 271 | Winneshiek | 43 17 45 N | 091 47 28 W |
| Gunderson Lutheran Vision Center | Hospital | 274 | Winneshiek | 43 17 30 N | 091 47 41 W |
| Gunn Elementary School | School | 325 | Pottawattamie | 41 16 53 N | 095 50 04 W |
| Gunn School | School | 323 | Pottawattamie | 41 16 55 N | 095 50 05 W |
| Gunsolley Residence Hall | Building | 345 | Decatur | 40 37 03 N | 093 55 30 W |
| Gurley Post Office (historical) | Post Office | 401 | Cass | 41 30 05 N | 095 00 13 W |
| Guss | Populated Place | 369 | Taylor | 40 50 31 N | 094 51 29 W |
| Guss Cemetery | Cemetery | 380 | Taylor | 40 51 01 N | 094 51 04 W |
| Guss Post Office (historical) | Post Office | 369 | Taylor | 40 50 31 N | 094 51 29 W |
| Gustafson Lake | Lake | 411 | Buena Vista | 42 52 48 N | 095 08 59 W |
| Gutchie Manitou State Monument Park | Park | 393 | Lyon | 43 29 50 N | 096 35 36 W |
| Gutekunst Public Library | Building | 325 | Marshall | 42 01 04 N | 093 10 04 W |
| Guthrie Center | Populated Place | 338 | Guthrie | 41 40 38 N | 094 30 12 W |
| Guthrie Center (historical) | Locale | 330 | Guthrie | 41 40 40 N | 094 30 26 W |
| Guthrie Center Elementary School | School | 356 | Guthrie | 41 41 07 N | 094 30 13 W |
| Guthrie Center Fairgrounds | Locale | 326 | Guthrie | 41 40 22 N | 094 30 36 W |
| Guthrie Center Feed Mill Elevator | Locale | 324 | Guthrie | 41 41 00 N | 094 30 31 W |
| Guthrie Center Golf Club | Locale | 354 | Guthrie | 41 40 45 N | 094 28 51 W |
| Guthrie Center High School | School | 337 | Guthrie | 41 40 14 N | 094 29 41 W |
| Guthrie Center Library | Building | 336 | Guthrie | 41 40 44 N | 094 30 12 W |
| Guthrie Center Municipal Airport | Airport | 327 | Guthrie | 41 40 55 N | 094 30 46 W |
| Guthrie Center Post Office | Post Office | 330 | Guthrie | 41 40 40 N | 094 30 26 W |
| Guthrie Center Seventh Day Adventist Church | Church | 379 | Guthrie | 41 40 48 N | 094 29 34 W |
| Guthrie County | Civil | 357 | Guthrie | 41 41 00 N | 094 30 03 W |
| Guthrie County Care Facility | Building | 367 | Guthrie | 41 40 02 N | 094 25 17 W |
| Guthrie County Courthouse | Building | 342 | Guthrie | 41 40 43 N | 094 30 07 W |
| Guthrie County Historical Village | Locale | 320 | Guthrie | 41 41 16 N | 094 22 01 W |
| Guthrie County Hospital | Hospital | 379 | Guthrie | 41 41 02 N | 094 29 37 W |
| Guthrie County Park | Park | 307 | Guthrie | 41 41 12 N | 094 22 14 W |
| Guthrie County Regional Airport | Airport | 368 | Guthrie | 41 41 16 N | 094 26 07 W |
| Guthrie County Sheriff Department | Building | 342 | Guthrie | 41 40 43 N | 094 30 07 W |
| Guthrie Family Medicine Center | Hospital | 343 | Guthrie | 41 40 41 N | 094 30 08 W |
| Guthrie Fire Station | Building | 330 | Guthrie | 41 40 40 N | 094 30 26 W |
| Guthrie Grove Camp | Locale | 367 | Guthrie | 41 46 47 N | 094 30 12 W |
| Gutknecht Roadside Park | Park | 284 | Grundy | 42 19 60 N | 092 37 56 W |
| Guttenberg | Locale | 188 | Clayton | 42 47 24 N | 091 06 10 W |
| Guttenberg | Populated Place | 188 | Clayton | 42 47 09 N | 091 05 58 W |
| Guttenberg Care Center | Hospital | 287 | Clayton | 42 47 45 N | 091 06 40 W |
| Guttenberg Cemetery | Cemetery | 200 | Clayton | 42 46 09 N | 091 06 13 W |
| Guttenberg Chiropractic and Sports Medicine Clinic | Hospital | 189 | Clayton | 42 46 32 N | 091 06 00 W |
| Guttenberg City Hall | Building | 190 | Clayton | 42 46 54 N | 091 05 42 W |
| Guttenberg City Park | Park | 195 | Clayton | 42 46 60 N | 091 06 42 W |
| Guttenberg Community School | School | 187 | Clayton | 42 47 07 N | 091 05 46 W |
| Guttenberg Golf and Country Club | Locale | 299 | Clayton | 42 49 10 N | 091 07 26 W |
| Guttenberg Municipal Hospital | Hospital | 188 | Clayton | 42 47 09 N | 091 05 57 W |
| Guttenberg Police Department | Building | 189 | Clayton | 42 46 53 N | 091 05 50 W |
| Guttenberg Post Office | Post Office | 190 | Clayton | 42 46 52 N | 091 05 45 W |
| Guttenberg Public Library | Building | 189 | Clayton | 42 46 48 N | 091 05 48 W |
| Gvist Chiropractic Clinic | Hospital | 242 | Warren | 41 29 50 N | 093 29 11 W |
| Gwin Cemetery | Cemetery | 257 | Poweshiek | 41 43 30 N | 092 22 11 W |
| Gwinn Cemetery | Cemetery | 326 | Wayne | 40 53 30 N | 093 31 27 W |
| Gym and Wellness Center | Building | 284 | Polk | 41 35 00 N | 093 39 41 W |
| Gypsum | Locale | 338 | Webster | 42 28 30 N | 094 07 33 W |
| Gypsum Creek | Stream | | Webster | 42 27 35 N | 094 09 29 W |
| Gypsum Post Office (historical) | Post Office | 338 | Webster | 42 28 30 N | 094 07 33 W |
| H Banla Grounds Cemetery | Cemetery | 192 | Lee | 40 38 00 N | 091 41 11 W |