Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Millsite Access | Locale | 340 | Plymouth | 42 45 50 N | 096 37 56 W |
| Westfield Creek | Stream | | Plymouth | 42 45 17 N | 096 37 09 W |
| Westfield | Locale | 344 | Plymouth | 42 45 22 N | 096 36 23 W |
| Westfield | Populated Place | 345 | Plymouth | 42 45 20 N | 096 36 21 W |
| Westfield Congregational Church | Church | 345 | Plymouth | 42 45 20 N | 096 36 21 W |
| Westfield Post Office | Post Office | 345 | Plymouth | 42 45 20 N | 096 36 21 W |
| Gitchie Manitou State Preserve | Forest | 395 | Lyon | 43 29 57 N | 096 35 51 W |
| Gutchie Manitou State Monument Park | Park | 393 | Lyon | 43 29 50 N | 096 35 36 W |
| Westfield Township Cemetery | Cemetery | 384 | Plymouth | 42 45 04 N | 096 35 30 W |
| Silver Maple County Park | Park | 346 | Plymouth | 42 48 20 N | 096 35 21 W |
| Malton Post Office (historical) | Post Office | 369 | Plymouth | 42 42 17 N | 096 35 21 W |
| Blood Run | Stream | | Lyon | 43 27 53 N | 096 35 07 W |
| Gibraltar Post Office (historical) | Post Office | 415 | Lyon | 43 27 00 N | 096 35 03 W |
| Grandview Cemetery | Cemetery | 434 | Lyon | 43 26 54 N | 096 34 53 W |
| Beloit | Locale | 379 | Lyon | 43 16 53 N | 096 34 29 W |
| Beloit | Populated Place | 379 | Lyon | 43 16 53 N | 096 34 29 W |
| Beloit Post Office (historical) | Post Office | 379 | Lyon | 43 16 53 N | 096 34 29 W |
| Blood Run / Rock Island National Landmark | Park | 411 | Lyon | 43 28 55 N | 096 34 11 W |
| Akron Municipal Airport | Airport | 371 | Plymouth | 42 48 21 N | 096 33 47 W |
| Grandview Church | Church | 447 | Lyon | 43 26 53 N | 096 33 46 W |
| Akron | Locale | 344 | Plymouth | 42 49 43 N | 096 33 41 W |
| Akron City Convalescent Care | Hospital | 349 | Plymouth | 42 49 25 N | 096 33 36 W |
| Akron | Populated Place | 348 | Plymouth | 42 49 44 N | 096 33 34 W |
| Akron Dental Clinic | Hospital | 348 | Plymouth | 42 49 44 N | 096 33 34 W |
| Beeck Family Chiropractic Clinic | Hospital | 348 | Plymouth | 42 49 44 N | 096 33 34 W |
| Farmers Co-operative Elevator | Locale | 348 | Plymouth | 42 49 44 N | 096 33 34 W |
| First Baptist Church | Church | 348 | Plymouth | 42 49 44 N | 096 33 34 W |
| Trinity Lutheran Church | Church | 351 | Plymouth | 42 49 24 N | 096 33 32 W |
| Beloit Cemetery | Cemetery | 398 | Lyon | 43 17 25 N | 096 33 31 W |
| Akron Chiropractic Center | Hospital | 349 | Plymouth | 42 49 43 N | 096 33 31 W |
| Immanuel Lutheran Church | Church | 350 | Plymouth | 42 49 37 N | 096 33 31 W |
| Akron Family Practice Clinic | Hospital | 350 | Plymouth | 42 49 43 N | 096 33 29 W |
| Akron Post Office | Post Office | 350 | Plymouth | 42 49 45 N | 096 33 26 W |
| Akron Public Library | Building | 351 | Plymouth | 42 49 42 N | 096 33 26 W |
| Wesley United Methodist Church | Church | 352 | Plymouth | 42 49 36 N | 096 33 26 W |
| Akron Country Club | Locale | 356 | Plymouth | 42 49 15 N | 096 33 26 W |
| Granite | Populated Place | 399 | Lyon | 43 28 08 N | 096 33 23 W |
| Granite (historical) | Locale | 399 | Lyon | 43 28 08 N | 096 33 23 W |
| Granite Post Office (historical) | Post Office | 399 | Lyon | 43 28 08 N | 096 33 23 W |
| First Church of Christ | Church | 353 | Plymouth | 42 49 34 N | 096 33 22 W |
| Joy Creek | Stream | | Plymouth | 42 40 08 N | 096 33 16 W |
| Saint Patricks Catholic Church | Church | 355 | Plymouth | 42 49 41 N | 096 33 14 W |
| Nelson Creek | Stream | | Lyon | 43 15 31 N | 096 33 12 W |
| Hidden Bridge Wildlife Area | Park | 384 | Lyon | 43 24 16 N | 096 33 01 W |
| Akron Westfield Community School | School | 374 | Plymouth | 42 49 58 N | 096 32 59 W |
| Beaver Creek | Stream | | Plymouth | 42 50 28 N | 096 32 53 W |
| Riverside Cemetery | Cemetery | 374 | Plymouth | 42 50 12 N | 096 32 44 W |
| Big Sioux County Park | Park | 347 | Plymouth | 42 50 58 N | 096 32 40 W |
| Saint Josephs Cemetery | Cemetery | 382 | Plymouth | 42 49 24 N | 096 32 15 W |
| Rock Creek | Stream | | Plymouth | 42 39 19 N | 096 32 15 W |
| Township of Westfield | Civil | 400 | Plymouth | 42 46 20 N | 096 32 14 W |
| Five Ridge Prairie State Preserve | Park | 421 | Plymouth | 42 40 50 N | 096 31 51 W |
| Township of Sioux | Civil | 396 | Plymouth | 42 42 14 N | 096 31 44 W |
| Indian Creek | Stream | | Plymouth | 42 53 24 N | 096 31 33 W |
| Klondike Creek | Stream | | Lyon | 43 22 51 N | 096 31 20 W |
| Klondike Bridge | Bridge | 383 | Osceola | 43 23 09 N | 096 31 16 W |
| Klondike River Access | Locale | 384 | Lyon | 43 23 10 N | 096 31 16 W |
| Klondike | Populated Place | 395 | Lyon | 43 23 16 N | 096 31 15 W |
| Klondike Post Office (historical) | Post Office | 395 | Lyon | 43 23 16 N | 096 31 15 W |
| Big Sioux River Wildlife Area - Nelson Tract | Park | 412 | Lyon | 43 19 40 N | 096 31 11 W |
| Big Sioux River Wildlife Area - Kroger Tract | Park | 437 | Lyon | 43 18 00 N | 096 31 11 W |
| Sixmile Creek | Stream | | Sioux | 42 55 53 N | 096 31 06 W |
| Big Sioux River Wildlife Area - Olson Tract | Park | 410 | Lyon | 43 21 40 N | 096 31 01 W |
| Chatsworth | Locale | 354 | Sioux | 42 54 50 N | 096 31 01 W |
| Township of Sioux | Civil | 427 | Lyon | 43 28 09 N | 096 30 59 W |
| Chatsworth | Populated Place | 354 | Sioux | 42 54 58 N | 096 30 59 W |
| Chatsworth Post Office (historical) | Post Office | 354 | Sioux | 42 54 58 N | 096 30 59 W |
| Broken Kettle Creek | Stream | | Plymouth | 42 37 39 N | 096 30 54 W |
| Sunrise School | School | 451 | Sioux | 43 15 04 N | 096 30 38 W |
| Big Sioux Wildlife Public Hunting Area | Area | 429 | Lyon | 43 20 28 N | 096 30 35 W |
| Deer Creek Wildlife Management Area | Park | 397 | Plymouth | 42 43 40 N | 096 30 31 W |
| Upland Post Office (historical) | Post Office | 387 | Lyon | 43 23 28 N | 096 30 26 W |
| Highway Twelve Rest Area | Locale | 372 | Sioux | 42 56 42 N | 096 30 17 W |
| Broken Kettle Post Office (historical) | Post Office | 340 | Plymouth | 42 38 10 N | 096 30 16 W |
| Broken Kettle | Locale | 349 | Plymouth | 42 38 57 N | 096 30 10 W |
| Township of Portland | Civil | 412 | Plymouth | 42 51 32 N | 096 29 55 W |
| Sunnyside School | School | 355 | Plymouth | 42 41 08 N | 096 29 53 W |
| Darlington Post Office (historical) | Post Office | 369 | Sioux | 43 13 32 N | 096 29 51 W |
| Elmsprings (historical) | Locale | 369 | Sioux | 43 13 32 N | 096 29 51 W |
| Elmsprings Post Office (historical) | Post Office | 369 | Sioux | 43 13 32 N | 096 29 51 W |
| Township of Lyon | Civil | 434 | Lyon | 43 17 36 N | 096 29 49 W |
| Roeman-Stetrichs Wildlife Area | Park | 421 | Lyon | 43 28 16 N | 096 29 43 W |
| Hawarden Municipal Airport | Airport | 362 | Sioux | 43 02 13 N | 096 29 35 W |
| Edgewater Park | Park | 335 | Woodbury | 42 30 60 N | 096 29 33 W |
| Township of Centennial | Civil | 405 | Lyon | 43 23 28 N | 096 29 31 W |
| River Drive Trail | Trail | 336 | Woodbury | 42 31 30 N | 096 29 31 W |
| Elm Spring | Populated Place | 410 | Sioux | 43 18 38 N | 096 29 29 W |
| Township of Settlers | Civil | 385 | Sioux | 43 13 37 N | 096 29 27 W |
| Dry Creek | Stream | | Sioux | 42 59 30 N | 096 29 24 W |
| Deer Creek | Stream | | Plymouth | 42 41 28 N | 096 29 22 W |
| Hawarden | Locale | 357 | Sioux | 42 59 47 N | 096 29 21 W |
| Calliope (historical) | Locale | 359 | Sioux | 43 00 28 N | 096 29 19 W |
| Calliope Post Office (historical) | Post Office | 359 | Sioux | 43 00 28 N | 096 29 19 W |
| Township of Logan | Civil | 377 | Sioux | 42 56 48 N | 096 29 19 W |
| Calliope Village | Locale | 359 | Sioux | 43 00 27 N | 096 29 18 W |
| Millnerville | Populated Place | 360 | Plymouth | 42 41 55 N | 096 29 18 W |
| Millnerville Post Office (historical) | Post Office | 360 | Plymouth | 42 41 55 N | 096 29 18 W |
| Our Saviors Church | Church | 448 | Lyon | 43 21 14 N | 096 29 14 W |
| Our Saviors Lutheran Cemetery | Cemetery | 448 | Lyon | 43 21 13 N | 096 29 11 W |
| Hawarden Family Medical Center | Hospital | 359 | Sioux | 42 59 48 N | 096 29 11 W |
| Trinity Lutheran Church | Church | 357 | Sioux | 42 59 54 N | 096 29 08 W |
| Hawarden | Populated Place | 360 | Sioux | 42 59 45 N | 096 29 07 W |
| Hawarden Feed and Grain Company Elevator | Locale | 360 | Sioux | 42 59 39 N | 096 29 07 W |
| Hawarden Golf Club | Locale | 360 | Sioux | 42 59 45 N | 096 29 07 W |
| Hawarden Police Department | Building | 359 | Sioux | 42 59 35 N | 096 29 06 W |
| Hawarden Post Office | Post Office | 360 | Sioux | 42 59 45 N | 096 29 05 W |
| West Sioux Middle School | School | 357 | Sioux | 42 59 58 N | 096 29 05 W |
| Hawarden Community Church | Church | 363 | Sioux | 43 00 19 N | 096 29 04 W |
| Hawarden Elementary School | School | 358 | Sioux | 43 00 01 N | 096 29 00 W |
| Hawarden United Methodist Church | Church | 359 | Sioux | 43 00 04 N | 096 29 00 W |