Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Logan Post Office | Post Office | 333 | Harrison | 41 38 38 N | 095 47 24 W |
| Logan Public Library | Building | 331 | Harrison | 41 38 38 N | 095 47 12 W |
| Logan School | School | 309 | Page | 40 45 24 N | 095 22 09 W |
| Logan School | School | 254 | Polk | 41 36 13 N | 093 35 23 W |
| Logan Township Cemetery | Cemetery | 359 | Calhoun | 42 21 14 N | 094 31 60 W |
| Logan Township Cemetery | Cemetery | 427 | Clay | 43 02 56 N | 094 58 30 W |
| Logan Wildlife Area | Park | 360 | Calhoun | 42 18 55 N | 094 37 41 W |
| Logan-Magnolia Community School | School | 321 | Harrison | 41 39 13 N | 095 47 21 W |
| Logan-Missouri Valley Country Club | Locale | 324 | Harrison | 41 35 52 N | 095 50 01 W |
| Logansport | Populated Place | 324 | Boone | 42 04 03 N | 093 56 49 W |
| Logsdon Park | Park | 318 | Hardin | 42 22 57 N | 093 15 53 W |
| Lohberger Memorial Park | Park | 308 | Tama | 42 02 07 N | 092 38 16 W |
| Lohff Schuman Memorial Center | Building | 424 | Ida | 42 28 35 N | 095 32 33 W |
| Lohr Wildlife Refuge | Park | 345 | Calhoun | 42 16 45 N | 094 29 46 W |
| Lohrville | Populated Place | 351 | Calhoun | 42 16 13 N | 094 32 55 W |
| Lohrville (historical) | Locale | 350 | Calhoun | 42 15 56 N | 094 32 51 W |
| Lohrville City Hall | Building | 351 | Calhoun | 42 16 13 N | 094 32 55 W |
| Lohrville Fire Station | Building | 351 | Calhoun | 42 16 13 N | 094 32 55 W |
| Lohrville Post Office | Post Office | 351 | Calhoun | 42 16 13 N | 094 32 55 W |
| Lollar Park | Park | 313 | Marshall | 41 56 13 N | 093 06 20 W |
| Loman Bridge | Bridge | 284 | Winneshiek | 43 15 33 N | 091 47 58 W |
| London and Deer Creek Cemetery | Cemetery | 366 | Worth | 43 29 15 N | 093 07 27 W |
| Lone Chimney Monument Historical Marker | Park | 165 | Lee | 40 37 48 N | 091 18 16 W |
| Lone Grove Creek | Stream | | Guthrie | 41 40 31 N | 094 34 48 W |
| Lone Office Post Office (historical) | Post Office | 384 | Taylor | 40 51 10 N | 094 29 16 W |
| Lone Pine Golf Course | Locale | 352 | Delaware | 42 38 22 N | 091 12 07 W |
| Lone Pine Mobile Home Court | Populated Place | 272 | Poweshiek | 41 43 18 N | 092 27 13 W |
| Lone Rock | Populated Place | 366 | Kossuth | 43 13 07 N | 094 19 37 W |
| Lone Rock City Hall | Building | 370 | Kossuth | 43 13 12 N | 094 19 37 W |
| Lone Rock Co-operative Exchange Elevator | Locale | 370 | Kossuth | 43 13 12 N | 094 19 37 W |
| Lone Rock Post Office | Post Office | 370 | Kossuth | 43 13 12 N | 094 19 37 W |
| Lone Rock United Presbyterian Church | Church | 370 | Kossuth | 43 13 12 N | 094 19 37 W |
| Lone Star Church | Church | 434 | Guthrie | 41 43 41 N | 094 43 27 W |
| Lone Star School | School | 161 | Louisa | 41 08 20 N | 090 59 57 W |
| Lone Tree | Populated Place | 221 | Johnson | 41 29 17 N | 091 25 34 W |
| Lone Tree (historical) | Locale | 217 | Johnson | 41 29 20 N | 091 25 31 W |
| Lone Tree Branch | Stream | | Cass | 41 20 50 N | 094 59 25 W |
| Lone Tree Branch | Stream | | Cass | 41 13 03 N | 095 09 23 W |
| Lone Tree Cemetery | Cemetery | 423 | Buena Vista | 42 52 55 N | 095 08 58 W |
| Lone Tree Cemetery | Cemetery | 429 | Clay | 43 08 28 N | 095 20 06 W |
| Lone Tree Cemetery | Cemetery | 220 | Johnson | 41 29 35 N | 091 25 31 W |
| Lone Tree Cemetery | Cemetery | 218 | Muscatine | 41 29 03 N | 091 20 53 W |
| Lone Tree City Hall | Building | 222 | Johnson | 41 29 16 N | 091 25 34 W |
| Lone Tree Creek | Stream | | Benton | 42 03 24 N | 091 46 54 W |
| Lone Tree Family Practice Center | Hospital | 224 | Johnson | 41 29 13 N | 091 25 34 W |
| Lone Tree Fire Station | Building | 222 | Johnson | 41 29 16 N | 091 25 34 W |
| Lone Tree Health Care Center | Hospital | 221 | Johnson | 41 28 53 N | 091 25 09 W |
| Lone Tree Lake (historical) | Lake | 303 | Harrison | 41 32 10 N | 095 59 31 W |
| Lone Tree Point | Cape | 374 | Cerro Gordo | 43 06 59 N | 093 27 33 W |
| Lone Tree Point | Cape | 426 | Dickinson | 43 23 21 N | 095 06 23 W |
| Lone Tree Post Office | Post Office | 222 | Johnson | 41 29 16 N | 091 25 32 W |
| Lone Tree School (historical) | School | 359 | Cass | 41 23 55 N | 095 01 37 W |
| Lone Tree School (historical) | School | 165 | Muscatine | 41 22 39 N | 091 05 04 W |
| Lone Tree School (historical) | School | 240 | Scott | 41 38 25 N | 090 34 07 W |
| Lone Tree Secondary School | School | 221 | Johnson | 41 29 05 N | 091 25 36 W |
| Lone Willow Creek | Stream | | Audubon | 41 45 17 N | 095 03 48 W |
| Lonerock (historical) | Locale | 370 | Kossuth | 43 13 12 N | 094 19 37 W |
| Long Branch | Stream | | Appanoose | 40 36 13 N | 092 43 15 W |
| Long Branch | Stream | | Guthrie | 41 33 47 N | 094 15 17 W |
| Long Branch | Stream | | Marion | 41 12 28 N | 093 10 26 W |
| Long Branch | Stream | | Page | 40 36 25 N | 095 13 35 W |
| Long Branch | Stream | | Shelby | 41 42 35 N | 095 10 18 W |
| Long Branch | Stream | | Taylor | 40 52 01 N | 094 54 33 W |
| Long Cemetery | Cemetery | 230 | Jefferson | 41 01 30 N | 092 05 31 W |
| Long Creek | Locale | 180 | Louisa | 41 13 58 N | 091 16 46 W |
| Long Creek | Stream | | Decatur | 40 46 58 N | 093 52 48 W |
| Long Creek | Stream | | Des Moines | 40 44 55 N | 091 14 38 W |
| Long Creek | Stream | | Louisa | 41 14 10 N | 091 15 53 W |
| Long Creek Cemetery | Cemetery | 178 | Louisa | 41 12 38 N | 091 16 41 W |
| Long Creek Church | Church | 214 | Des Moines | 40 48 43 N | 091 18 52 W |
| Long Creek Methodist Cemetery | Cemetery | 214 | Des Moines | 40 48 45 N | 091 18 51 W |
| Long Dick Creek | Stream | | Story | 42 10 10 N | 093 34 34 W |
| Long Grove | Populated Place | 242 | Scott | 41 41 51 N | 090 34 57 W |
| Long Grove (historical) | Locale | 242 | Scott | 41 41 51 N | 090 34 57 W |
| Long Grove Cemetery | Cemetery | 334 | Fayette | 42 46 15 N | 091 52 36 W |
| Long Grove Christian Church | Church | 242 | Scott | 41 41 51 N | 090 34 57 W |
| Long Grove Christian Church Cemetery | Cemetery | 239 | Scott | 41 41 43 N | 090 35 00 W |
| Long Grove City Hall | Building | 242 | Scott | 41 41 51 N | 090 34 57 W |
| Long Grove Fire Department | Building | 242 | Scott | 41 41 51 N | 090 34 57 W |
| Long Grove Police Department | Building | 242 | Scott | 41 41 51 N | 090 34 57 W |
| Long Grove Post Office | Post Office | 242 | Scott | 41 41 51 N | 090 34 57 W |
| Long Island | Island | 162 | Des Moines | 40 55 19 N | 090 58 11 W |
| Long Island Marsh Public Hunting Area | Area | 415 | Palo Alto | 43 10 60 N | 094 53 12 W |
| Long Lake | Lake | 181 | Louisa | 41 23 21 N | 091 24 13 W |
| Long Memorial County Park | Park | 281 | Hardin | 42 14 57 N | 093 02 39 W |
| Long Point | Populated Place | 244 | Tama | 41 56 43 N | 092 29 02 W |
| Long Point Post Office (historical) | Post Office | 244 | Tama | 41 56 43 N | 092 29 02 W |
| Long Pond | Lake | 158 | Des Moines | 40 42 15 N | 091 07 48 W |
| Long Refuge | Park | 323 | Boone | 41 56 55 N | 093 50 21 W |
| Longdpun Habitat Area - Lukes Wetland | Park | 354 | Franklin | 42 45 15 N | 093 16 51 W |
| Longfellow Elementary School | School | 265 | Polk | 41 35 56 N | 093 36 44 W |
| Longfellow School | School | 242 | Benton | 41 53 27 N | 092 16 36 W |
| Longfellow School | School | 257 | Black Hawk | 42 30 35 N | 092 20 28 W |
| Longfellow School | School | 197 | Clinton | 41 49 44 N | 090 12 34 W |
| Longfellow School | School | 213 | Johnson | 41 39 14 N | 091 31 05 W |
| Longfellow School | School | 260 | Linn | 42 02 09 N | 091 34 51 W |
| Longfellow School | School | 299 | Pottawattamie | 41 14 31 N | 095 51 31 W |
| Longfellow School | School | 380 | Woodbury | 42 28 20 N | 096 21 43 W |
| Longmeadow Park | Park | 213 | Des Moines | 40 49 10 N | 091 09 22 W |
| Longmire Cemetery | Cemetery | 286 | Dallas | 41 33 35 N | 094 04 23 W |
| Longpoint (historical) | Locale | 244 | Tama | 41 56 43 N | 092 29 02 W |
| Longs Branch | Stream | | Montgomery | 41 02 17 N | 094 59 40 W |
| Longs Landing County Park | Park | 294 | Pottawattamie | 41 11 06 N | 095 50 41 W |
| Longstreth Cemetery | Cemetery | 265 | Iowa | 41 37 36 N | 092 15 17 W |
| Longview (historical) | Locale | 228 | Van Buren | 40 52 00 N | 091 52 19 W |
| Longview Golf Center | Locale | 287 | Polk | 41 39 28 N | 093 45 51 W |
| Longview Home | Hospital | 373 | Harrison | 41 34 00 N | 095 53 02 W |
| Longview Park | Park | 201 | Muscatine | 41 25 55 N | 091 03 31 W |
| Longview Post Office (historical) | Post Office | 228 | Van Buren | 40 52 00 N | 091 52 19 W |
| Lonning's Landing Campground and Canoe Site | Locale | 207 | Allamakee | 43 25 40 N | 091 30 41 W |