Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Las Americas United Methodist Church | Church | 266 | Polk | 41 36 02 N | 093 36 33 W |
| LaSalle High School | School | 255 | Linn | 41 58 06 N | 091 43 09 W |
| Lasky Wellness Clinic | Hospital | 424 | Buena Vista | 42 51 42 N | 094 58 57 W |
| Last Chance | Populated Place | 328 | Lucas | 40 57 23 N | 093 33 13 W |
| Last Chance Cemetery | Cemetery | 331 | Lucas | 40 57 30 N | 093 33 12 W |
| Last Chance Post Office (historical) | Post Office | 328 | Lucas | 40 57 23 N | 093 33 13 W |
| Lateral Ditch Number 1 | Canal | 342 | Webster | 42 36 10 N | 094 07 23 W |
| Lateral Ditch Number Eight | Stream | | Fremont | 40 41 15 N | 095 43 21 W |
| Lateral Number 1 | Canal | 335 | Webster | 42 30 23 N | 094 00 14 W |
| Lateral Number 1 | Canal | 337 | Webster | 42 31 12 N | 093 59 39 W |
| Lateral Number 10 | Canal | 280 | Fremont | 40 41 02 N | 095 42 36 W |
| Lateral Number 2 | Canal | 394 | Buena Vista | 42 45 12 N | 094 59 22 W |
| Lateral Number 8 | Canal | 281 | Fremont | 40 42 04 N | 095 43 24 W |
| Latham | Locale | 314 | Webster | 42 36 00 N | 094 13 51 W |
| Latham Hall | Building | 277 | Black Hawk | 42 30 45 N | 092 27 30 W |
| Latham Park | Park | 388 | Woodbury | 42 28 16 N | 096 20 37 W |
| Latham Post Office (historical) | Post Office | 314 | Webster | 42 35 60 N | 094 13 51 W |
| Latimer | Locale | 296 | Warren | 41 16 15 N | 093 39 18 W |
| Latimer | Populated Place | 378 | Franklin | 42 45 48 N | 093 22 06 W |
| Latimer (historical) | Locale | 376 | Franklin | 42 45 54 N | 093 22 07 W |
| Latimer Fire Department | Building | 378 | Franklin | 42 45 50 N | 093 22 06 W |
| Latimer Golf Club | Locale | 374 | Franklin | 42 45 40 N | 093 21 46 W |
| Latimer Post Office | Post Office | 378 | Franklin | 42 45 50 N | 093 22 06 W |
| Latimer Post Office (historical) | Post Office | 262 | Warren | 41 16 40 N | 093 39 51 W |
| Latimer Town Hall | Building | 378 | Franklin | 42 45 50 N | 093 22 06 W |
| Latino Native American Cultural Center | Building | 214 | Johnson | 41 39 25 N | 091 32 38 W |
| Latter Day Saints Cemetery | Cemetery | 428 | Shelby | 41 50 03 N | 095 28 45 W |
| Latter-Day Saints Church | Church | 340 | Decatur | 40 35 15 N | 094 00 17 W |
| Lattner Post Office (historical) | Post Office | 258 | Dubuque | 42 29 10 N | 090 53 00 W |
| Lattnerville | Populated Place | 253 | Dubuque | 42 29 08 N | 090 52 58 W |
| Latty | Populated Place | 211 | Des Moines | 40 54 12 N | 091 07 19 W |
| Latty (historical) | Locale | 210 | Des Moines | 40 54 13 N | 091 06 51 W |
| Latty Cemetery | Cemetery | 211 | Des Moines | 40 54 11 N | 091 07 20 W |
| Latty Post Office (historical) | Post Office | 211 | Des Moines | 40 54 12 N | 091 07 19 W |
| Lau Wildlife Area | Park | 362 | Hancock | 42 59 20 N | 093 36 29 W |
| Laura Ingalls Wilder Museum | Building | 378 | Winneshiek | 43 27 30 N | 091 51 56 W |
| Laura Ingalls Wilder Park | Park | 378 | Winneshiek | 43 27 30 N | 091 51 56 W |
| Laura Nanes Griffith Hall | Building | 265 | Marion | 41 24 06 N | 092 55 21 W |
| Laurel | Populated Place | 318 | Marshall | 41 53 03 N | 092 55 20 W |
| Laurel (historical) | Locale | 318 | Marshall | 41 53 03 N | 092 55 20 W |
| Laurel City Hall | Building | 318 | Marshall | 41 53 00 N | 092 55 19 W |
| Laurel Elementary School | School | 315 | Marshall | 41 52 50 N | 092 55 16 W |
| Laurel Hill Cemetery | Cemetery | 348 | Kossuth | 43 00 06 N | 094 11 39 W |
| Laurel Hill Cemetery | Cemetery | 277 | Polk | 41 35 29 N | 093 32 31 W |
| Laurel Hill School (historical) | School | 225 | Muscatine | 41 32 43 N | 090 59 50 W |
| Laurel Library | Building | 318 | Marshall | 41 53 00 N | 092 55 19 W |
| Laurel Park | Park | 347 | Webster | 42 17 05 N | 094 17 21 W |
| Laurel Post Office | Post Office | 317 | Marshall | 41 52 60 N | 092 55 22 W |
| Laurel School | School | 380 | Shelby | 41 39 06 N | 095 19 11 W |
| Laurel United Methodist Church | Church | 316 | Marshall | 41 52 57 N | 092 55 22 W |
| Laurens | Locale | 399 | Pocahontas | 42 50 53 N | 094 51 01 W |
| Laurens | Populated Place | 399 | Pocahontas | 42 50 48 N | 094 51 07 W |
| Laurens Cemetery | Cemetery | 397 | Pocahontas | 42 50 38 N | 094 49 60 W |
| Laurens City Police Department | Building | 399 | Pocahontas | 42 50 57 N | 094 51 04 W |
| Laurens City Town Hall | Building | 399 | Pocahontas | 42 50 57 N | 094 51 04 W |
| Laurens Golf and Country Club | Locale | 399 | Pocahontas | 42 50 48 N | 094 51 07 W |
| Laurens Medical Clinic | Hospital | 395 | Pocahontas | 42 50 48 N | 094 50 41 W |
| Laurens Post Office | Post Office | 399 | Pocahontas | 42 50 50 N | 094 51 08 W |
| Laurens Public Library | Building | 399 | Pocahontas | 42 50 57 N | 094 51 06 W |
| Laurens Schools | School | 399 | Pocahontas | 42 51 09 N | 094 51 04 W |
| Laurens Skyways Airport | Airport | 398 | Pocahontas | 42 49 60 N | 094 52 01 W |
| Lauther Grounds Cemetery | Cemetery | 191 | Lee | 40 41 30 N | 091 18 31 W |
| Laverne Lake | Lake | 280 | Story | 42 01 26 N | 093 38 50 W |
| Laverty Cemetery | Cemetery | 288 | Warren | 41 25 04 N | 093 31 29 W |
| Laverty Field | Airport | 289 | Warren | 41 24 55 N | 093 33 41 W |
| Lavinia | Populated Place | 371 | Calhoun | 42 24 28 N | 094 44 48 W |
| Lavinia (historical) | Locale | 371 | Calhoun | 42 24 28 N | 094 44 48 W |
| Lavinia Post Office (historical) | Post Office | 371 | Calhoun | 42 24 28 N | 094 44 48 W |
| Law Enforcement Academy | School | 289 | Polk | 41 42 00 N | 093 42 31 W |
| Law Hall | Building | 280 | Linn | 41 55 28 N | 091 25 22 W |
| Lawbaugh City Park | Park | 369 | Adair | 41 30 09 N | 094 19 10 W |
| Lawler | Locale | 331 | Chickasaw | 43 04 11 N | 092 09 11 W |
| Lawler | Populated Place | 330 | Chickasaw | 43 04 14 N | 092 09 01 W |
| Lawler Landing Strip | Airport | 429 | Crawford | 42 07 60 N | 095 06 51 W |
| Lawler Post Office | Post Office | 330 | Chickasaw | 43 04 10 N | 092 09 01 W |
| Lawler Public Library | Building | 330 | Chickasaw | 43 04 10 N | 092 09 01 W |
| Lawler Town Hall | Building | 330 | Chickasaw | 43 04 10 N | 092 09 01 W |
| Lawn Cemetery | Cemetery | 348 | Boone | 42 10 39 N | 094 05 15 W |
| Lawn Hill | Populated Place | 335 | Hardin | 42 17 52 N | 093 10 19 W |
| Lawn Hill (historical) | Locale | 335 | Hardin | 42 17 52 N | 093 10 19 W |
| Lawn Hill Cemetery | Cemetery | 338 | Hamilton | 42 16 04 N | 093 45 41 W |
| Lawn Hill School | School | 330 | Hamilton | 42 28 06 N | 093 50 10 W |
| Lawnhill Post Office (historical) | Post Office | 335 | Hardin | 42 17 52 N | 093 10 19 W |
| Lawrence Bridge | Bridge | 320 | Winneshiek | 43 04 59 N | 092 03 10 W |
| Lawrence Creek | Stream | | Henry | 40 58 38 N | 091 27 22 W |
| Lawrence Van Hook Historical Marker | Park | 267 | Jackson | 42 09 04 N | 090 35 22 W |
| Lawrenceburg | Populated Place | 279 | Warren | 41 13 38 N | 093 32 55 W |
| Lawrenceburg Post Office (historical) | Post Office | 270 | Warren | 41 13 36 N | 093 32 48 W |
| Lawson Elementary School | School | 254 | Polk | 41 40 21 N | 093 41 38 W |
| Lawther Hall | Building | 283 | Black Hawk | 42 30 59 N | 092 27 42 W |
| Lawton | Populated Place | 361 | Woodbury | 42 28 43 N | 096 11 02 W |
| Lawton (historical) | Locale | 353 | Woodbury | 42 28 49 N | 096 11 09 W |
| Lawton Airport | Airport | 372 | Woodbury | 42 28 60 N | 096 12 01 W |
| Lawton Fire Department | Building | 361 | Woodbury | 42 28 43 N | 096 11 02 W |
| Lawton Junior-Senior High School | School | 361 | Woodbury | 42 28 43 N | 096 11 02 W |
| Lawton Post Office | Post Office | 361 | Woodbury | 42 28 43 N | 096 11 02 W |
| Lawton-Bronson Elementary School | School | 343 | Woodbury | 42 24 35 N | 096 12 59 W |
| Lawton-Bronson Sports Complex | Park | 361 | Woodbury | 42 28 43 N | 096 11 02 W |
| Lazy Lagoon | Lake | 431 | Dickinson | 43 25 57 N | 095 10 30 W |
| Le Claire | Locale | 180 | Scott | 41 36 00 N | 090 20 35 W |
| Le Claire | Populated Place | 179 | Scott | 41 35 55 N | 090 20 36 W |
| Le Claire Baptist Church | Church | 216 | Scott | 41 35 51 N | 090 21 34 W |
| Le Claire Canal | Canal | 174 | Scott | 41 34 51 N | 090 23 44 W |
| Le Claire City Hall | Building | 196 | Scott | 41 36 04 N | 090 20 47 W |
| Le Claire Family Medical Clinic | Hospital | 180 | Scott | 41 36 08 N | 090 20 38 W |
| Le Claire Fire Department | Building | 180 | Scott | 41 35 59 N | 090 20 35 W |
| Le Claire Library | Building | 184 | Scott | 41 36 01 N | 090 20 38 W |
| Le Claire Police Department | Building | 196 | Scott | 41 36 04 N | 090 20 47 W |
| Le Claire Post Office | Post Office | 190 | Scott | 41 35 54 N | 090 20 48 W |
| Le Grand | Locale | 281 | Marshall | 42 00 01 N | 092 46 36 W |