Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Crestland Co-op Elevator | Locale | 341 | Taylor | 40 36 56 N | 094 28 38 W |
| Crestland Community School | School | 402 | Sac | 42 31 08 N | 095 05 32 W |
| Crestmoor Country Club | Locale | 396 | Union | 41 04 20 N | 094 23 11 W |
| Creston | Locale | 400 | Union | 41 03 25 N | 094 21 41 W |
| Creston | Populated Place | 400 | Union | 41 03 31 N | 094 21 41 W |
| Creston Chiropractic Center | Hospital | 393 | Union | 41 04 18 N | 094 22 22 W |
| Creston City Hall | Building | 400 | Union | 41 03 25 N | 094 21 44 W |
| Creston Fire Department | Building | 389 | Union | 41 03 41 N | 094 22 23 W |
| Creston High School | School | 399 | Union | 41 04 20 N | 094 22 06 W |
| Creston Medical Clinic | Hospital | 387 | Union | 41 03 08 N | 094 22 19 W |
| Creston Municipal Airport | Airport | 395 | Union | 41 01 17 N | 094 21 48 W |
| Creston Nursing Rehabilitation Center | Hospital | 396 | Union | 41 04 08 N | 094 23 03 W |
| Creston Post Office | Post Office | 395 | Union | 41 03 16 N | 094 21 52 W |
| Creston Vision Clinic | Hospital | 397 | Taylor | 40 52 57 N | 094 33 34 W |
| Creston Vision Clinic | Hospital | 397 | Union | 41 03 30 N | 094 21 49 W |
| Crestview Acres | Hospital | 255 | Linn | 42 02 10 N | 091 35 40 W |
| Crestview Elementary School | School | 283 | Polk | 41 36 45 N | 093 43 56 W |
| Crestview Mobile Home Park | Populated Place | 314 | Story | 42 01 25 N | 093 41 43 W |
| Crestview Nursing and Rehabilitation Center | Hospital | 224 | Cedar | 41 40 39 N | 091 20 52 W |
| Crestwood | Populated Place | 271 | Polk | 41 36 22 N | 093 42 47 W |
| Crestwood Baptist Church | Church | 255 | Polk | 41 36 02 N | 093 43 01 W |
| Crestwood Golf Club | Locale | 418 | Cass | 41 26 10 N | 094 46 05 W |
| Crestwood High School | School | 398 | Howard | 43 22 29 N | 092 06 21 W |
| Crestwood High School | School | 398 | Howard | 43 22 29 N | 092 06 11 W |
| Crestwood Junior High School | School | 397 | Howard | 43 22 32 N | 092 06 11 W |
| Creswell | Populated Place | 247 | Keokuk | 41 25 15 N | 092 01 28 W |
| Creswell Landing Strip | Airport | 317 | Monona | 41 55 15 N | 096 06 38 W |
| Creswell Post Office (historical) | Post Office | 244 | Keokuk | 41 24 41 N | 092 02 13 W |
| Creveling Cemetery | Cemetery | 347 | Decatur | 40 37 50 N | 093 53 56 W |
| Crew Public Library | Building | 218 | Henry | 40 51 10 N | 091 37 13 W |
| Cricket | Populated Place | 224 | Mahaska | 41 11 02 N | 092 48 26 W |
| Cricket (historical) | Locale | 224 | Mahaska | 41 11 02 N | 092 48 26 W |
| Cricket Post Office (historical) | Post Office | 224 | Mahaska | 41 11 02 N | 092 48 26 W |
| Criner Cemetery | Cemetery | 189 | Des Moines | 40 52 40 N | 091 07 36 W |
| Crippen (historical) | Locale | 387 | Palo Alto | 43 07 10 N | 094 45 57 W |
| Crippen Post Office (historical) | Post Office | 387 | Palo Alto | 43 07 10 N | 094 45 57 W |
| Crippin Corners | Locale | 385 | Palo Alto | 43 07 35 N | 094 45 29 W |
| Crisp | Populated Place | 381 | Harrison | 41 34 42 N | 095 42 31 W |
| Crisp Post Office (historical) | Post Office | 381 | Harrison | 41 34 42 N | 095 42 31 W |
| Criswell School (historical) | School | 235 | Scott | 41 38 14 N | 090 28 17 W |
| Crocker | Locale | 299 | Polk | 41 46 29 N | 093 40 12 W |
| Crocker | Populated Place | 299 | Polk | 41 46 29 N | 093 40 12 W |
| Crocker Cemetery | Cemetery | 303 | Polk | 41 46 43 N | 093 40 41 W |
| Crocker Center School | School | 293 | Polk | 41 43 52 N | 093 38 19 W |
| Crocker Post Office (historical) | Post Office | 299 | Polk | 41 46 29 N | 093 40 12 W |
| Crocker Spur | Canal | 281 | Fremont | 40 44 51 N | 095 48 21 W |
| Crocker Woods Park | Park | 243 | Polk | 41 36 60 N | 093 37 59 W |
| Croft Cemetery | Cemetery | 286 | Appanoose | 40 39 40 N | 092 42 21 W |
| Cromwell | Locale | 380 | Union | 41 02 44 N | 094 27 41 W |
| Cromwell | Populated Place | 392 | Union | 41 02 22 N | 094 27 43 W |
| Cromwell Center Post Office (historical) | Post Office | 410 | Clay | 43 14 30 N | 095 15 31 W |
| Cromwell Centre | Locale | 412 | Clay | 43 11 55 N | 095 14 07 W |
| Cromwell Congregational Church | Church | 391 | Union | 41 02 25 N | 094 27 44 W |
| Cromwell Heliport | Airport | 378 | Union | 41 02 20 N | 094 28 01 W |
| Cromwell Post Office | Post Office | 392 | Union | 41 02 22 N | 094 27 43 W |
| Crona Post Office (historical) | Post Office | 456 | O'Brien | 43 06 30 N | 095 32 01 W |
| Crook Cemetery | Cemetery | 346 | Pottawattamie | 41 27 30 N | 095 52 26 W |
| Crooked Creek | Stream | | Cass | 41 28 31 N | 094 52 17 W |
| Crooked Creek | Stream | | Cedar | 41 38 55 N | 091 07 60 W |
| Crooked Creek | Stream | | Hamilton | 42 14 19 N | 093 49 59 W |
| Crooked Creek | Stream | | Jefferson | 41 09 31 N | 091 43 02 W |
| Crooked Creek | Stream | | Johnson | 41 31 38 N | 091 32 06 W |
| Crooked Creek | Stream | | Lee | 40 35 03 N | 091 41 19 W |
| Crooked Creek | Stream | | Marion | 41 16 57 N | 092 55 56 W |
| Crooked Creek | Stream | | Pocahontas | 42 48 35 N | 094 31 03 W |
| Crooked Creek | Stream | | Ringgold | 40 43 26 N | 094 20 09 W |
| Crooked Creek | Stream | | Webster | 42 21 05 N | 094 02 33 W |
| Crooked Run | Stream | | Kossuth | 43 20 00 N | 094 25 43 W |
| Crooks (historical) | Locale | 355 | Webster | 42 19 32 N | 094 10 26 W |
| Crooks Post Office (historical) | Post Office | 355 | Webster | 42 19 32 N | 094 10 26 W |
| Crosby (historical) | Locale | 281 | Fremont | 40 41 10 N | 095 49 26 W |
| Croskrey Cemetery | Cemetery | 257 | Tama | 41 56 30 N | 092 37 11 W |
| Cross Evangelical Lutheran Church | Church | 307 | Floyd | 43 03 49 N | 092 40 08 W |
| Cross Ford Access Area | Locale | 308 | Hardin | 42 28 44 N | 093 11 16 W |
| Cross Post Office (historical) | Post Office | 353 | Ringgold | 40 41 45 N | 094 03 10 W |
| Crosspointe Church | Church | 290 | Polk | 41 36 10 N | 093 46 29 W |
| Crosspointe Church | Church | 290 | Polk | 41 33 35 N | 093 45 33 W |
| Crossroad Evangelical Free Church | Church | 336 | Madison | 41 29 34 N | 094 07 22 W |
| Crossroad United Church of Christ | Church | 295 | Warren | 41 21 24 N | 093 33 33 W |
| Crossroads Assembly of God Church | Church | 274 | Black Hawk | 42 28 03 N | 092 19 59 W |
| Crossroads Cemetery | Cemetery | 312 | Appanoose | 40 44 40 N | 093 04 32 W |
| Crossroads Center Mall | Locale | 262 | Black Hawk | 42 27 45 N | 092 19 19 W |
| Crossroads Christian Church | Church | 301 | Pottawattamie | 41 16 22 N | 095 53 21 W |
| Crossroads Church | Church | 363 | Pottawattamie | 41 28 36 N | 095 20 17 W |
| Crossroads Community Church | Church | 272 | Black Hawk | 42 27 31 N | 092 20 14 W |
| Crossroads Elementary School | School | 292 | Polk | 41 35 06 N | 093 46 19 W |
| Crossroads Mall | Locale | 340 | Webster | 42 30 14 N | 094 09 40 W |
| Crossroads Park | Park | 285 | Polk | 41 35 18 N | 093 46 26 W |
| Crossroads School | School | 248 | Wapello | 41 00 59 N | 092 18 17 W |
| Crossview Fellowship | Church | 186 | Lee | 40 24 30 N | 091 23 27 W |
| Crosswinds United Methodist Church | Church | 257 | Linn | 42 00 24 N | 091 40 21 W |
| Croton | Populated Place | 167 | Lee | 40 35 25 N | 091 41 27 W |
| Croton (historical) | Locale | 167 | Lee | 40 35 25 N | 091 41 27 W |
| Croton Cemetery | Cemetery | 208 | Lee | 40 35 28 N | 091 40 53 W |
| Croton Civil War Memorial Park | Park | 166 | Lee | 40 35 18 N | 091 41 34 W |
| Croton Post Office (historical) | Post Office | 167 | Lee | 40 35 25 N | 091 41 27 W |
| Crouse Park | Park | 335 | Greene | 42 06 30 N | 094 14 01 W |
| Crow Creek | Stream | | Jefferson | 40 56 38 N | 091 56 28 W |
| Crow Creek | Stream | | Marion | 41 14 38 N | 093 09 34 W |
| Crow Creek | Stream | | Polk | 41 18 31 N | 093 18 25 W |
| Crow Creek | Stream | | Scott | 41 32 49 N | 090 26 35 W |
| Crow Creek | Stream | | Wayne | 40 49 28 N | 093 09 02 W |
| Crow Creek Park | Park | 200 | Scott | 41 34 11 N | 090 28 09 W |
| Crow Valley Golf Course and Country Club | Locale | 211 | Scott | 41 35 10 N | 090 29 30 W |
| Crowfoot Post Office (historical) | Post Office | 332 | Buchanan | 42 35 35 N | 091 47 31 W |
| Crown | Locale | 335 | Decatur | 40 47 50 N | 093 43 37 W |
| Crown Hill Cemetery | Cemetery | 376 | Calhoun | 42 28 51 N | 094 44 11 W |
| Crown Hill Cemetery | Cemetery | 442 | Palo Alto | 43 07 58 N | 094 53 17 W |
| Crown Post Office (historical) | Post Office | 335 | Decatur | 40 47 50 N | 093 43 37 W |
| Crows Nest Resort | Populated Place | 432 | Dickinson | 43 22 23 N | 095 07 25 W |