Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Cozad Cemetery | Cemetery | 288 | Appanoose | 40 50 00 N | 093 01 51 W |
| Cozy Camper Campgrounds | Locale | 380 | Union | 41 03 00 N | 094 23 09 W |
| CR Family Dentistry Center | Hospital | 358 | Carroll | 41 52 16 N | 094 40 34 W |
| Crab Apple | Locale | 242 | Linn | 42 02 45 N | 091 29 57 W |
| Crab Apple School (historical) | School | 236 | Muscatine | 41 32 48 N | 090 53 00 W |
| Crab Town | Populated Place | 241 | Jackson | 42 10 24 N | 090 48 21 W |
| Crab Tree Lake | Lake | 272 | Marshall | 41 51 58 N | 093 12 46 W |
| Crabapple Cemetery | Cemetery | 239 | Linn | 42 02 51 N | 091 29 60 W |
| Crabapple Creek | Stream | | Audubon | 41 41 25 N | 094 53 16 W |
| Crabapple Creek | Stream | | Linn | 42 01 53 N | 091 29 03 W |
| Crabapple Creek | Stream | | Mills | 40 59 36 N | 095 20 23 W |
| Crabapple Post Office (historical) | Post Office | 268 | Linn | 42 06 10 N | 091 29 57 W |
| Crabb Cemetery | Cemetery | 219 | Jackson | 42 10 30 N | 090 48 08 W |
| Crabb Post Office (historical) | Post Office | 219 | Jackson | 42 10 32 N | 090 48 11 W |
| Crabb's Mills Post Office (historical) | Post Office | 219 | Jackson | 42 10 32 N | 090 48 10 W |
| Craig | Populated Place | 426 | Plymouth | 42 53 45 N | 096 18 35 W |
| Craig (historical) | Locale | 429 | Plymouth | 42 53 40 N | 096 18 31 W |
| Craig Cemetery | Cemetery | 258 | Linn | 41 55 30 N | 091 28 21 W |
| Craig Cemetery | Cemetery | 285 | Tama | 41 55 45 N | 092 20 51 W |
| Craig Post Office (historical) | Post Office | 426 | Plymouth | 42 53 45 N | 096 18 35 W |
| Craig School | School | 282 | Monroe | 41 03 30 N | 092 56 57 W |
| Crain Chiropractic Clinic | Hospital | 287 | Warren | 41 21 28 N | 093 33 03 W |
| Crain Creek (historical) | Populated Place | 280 | Black Hawk | 42 32 60 N | 092 15 33 W |
| Crain Creek Post Office (historical) | Post Office | 296 | Black Hawk | 42 38 30 N | 092 15 31 W |
| Crain Medical Clinic | Hospital | 375 | Ringgold | 40 42 58 N | 094 14 16 W |
| Crandall Park | Park | 241 | Scott | 41 38 56 N | 090 35 04 W |
| Crandall Post Office (historical) | Post Office | 366 | Calhoun | 42 28 40 N | 094 52 26 W |
| Crandalls Beach | Beach | 428 | Dickinson | 43 29 26 N | 095 07 30 W |
| Crandalls Lodge | Building | 427 | Dickinson | 43 29 50 N | 095 06 54 W |
| Crandic Park | Park | 196 | Johnson | 41 40 02 N | 091 33 31 W |
| Crane Cemetery | Cemetery | 224 | Jefferson | 40 55 30 N | 091 43 41 W |
| Crane Cemetery | Cemetery | 208 | Mahaska | 41 11 30 N | 092 41 19 W |
| Crane Chapel | Church | 253 | Polk | 41 36 09 N | 093 35 13 W |
| Crane Creek | Stream | | Black Hawk | 42 34 16 N | 092 07 01 W |
| Crane Creek | Stream | | Cerro Gordo | 43 08 34 N | 093 16 45 W |
| Crane Creek | Stream | | Fayette | 43 00 29 N | 091 57 41 W |
| Crane Creek | Stream | | Muscatine | 41 25 44 N | 091 16 11 W |
| Crane Creek Bridge | Bridge | 296 | Black Hawk | 42 38 32 N | 092 15 23 W |
| Crane Creek County Park | Park | 292 | Black Hawk | 42 35 34 N | 092 13 04 W |
| Crane Creek Post Office (historical) | Post Office | 360 | Howard | 43 15 47 N | 092 18 31 W |
| Crane Creek Wildlife Area | Park | 354 | Howard | 43 13 60 N | 092 17 31 W |
| Crane Lake (historical) | Lake | 391 | Emmet | 43 18 06 N | 094 39 57 W |
| Crane Outlet | Canal | 314 | Monona | 41 51 33 N | 096 04 58 W |
| Cranes Pond Park | Park | 214 | Henry | 40 58 25 N | 091 33 31 W |
| Cranston | Populated Place | 202 | Muscatine | 41 22 45 N | 091 15 41 W |
| Cranston (historical) | Locale | 202 | Muscatine | 41 22 45 N | 091 15 41 W |
| Cranston Cemetery | Cemetery | 202 | Muscatine | 41 22 45 N | 091 15 03 W |
| Cranston Post Office (historical) | Post Office | 202 | Muscatine | 41 22 45 N | 091 15 41 W |
| Crapo Park | Park | 210 | Des Moines | 40 46 36 N | 091 06 07 W |
| Crathorne | Populated Place | 432 | Plymouth | 42 48 26 N | 096 19 53 W |
| Crathorne Post Office (historical) | Post Office | 432 | Plymouth | 42 48 26 N | 096 19 53 W |
| Craven Cemetery | Cemetery | 216 | Washington | 41 20 40 N | 091 47 01 W |
| Crawford County | Civil | 409 | Crawford | 42 02 00 N | 095 23 01 W |
| Crawford County Clinic | Hospital | 358 | Crawford | 42 00 48 N | 095 20 45 W |
| Crawford County Courthouse | Building | 387 | Crawford | 42 01 02 N | 095 21 25 W |
| Crawford County Fairgrounds | Locale | 354 | Crawford | 42 01 35 N | 095 21 53 W |
| Crawford County Home Cemetery | Cemetery | 369 | Crawford | 41 57 03 N | 095 25 51 W |
| Crawford County Home for the Aged | Building | 357 | Crawford | 41 57 36 N | 095 26 39 W |
| Crawford County Memorial Hospital | Hospital | 381 | Crawford | 42 00 55 N | 095 20 31 W |
| Crawford County Sheriffs Office | Building | 385 | Crawford | 42 01 04 N | 095 21 27 W |
| Crawford County Speedway | Locale | 355 | Crawford | 42 01 40 N | 095 21 50 W |
| Crawford Creek | Stream | | Ida | 42 17 45 N | 095 37 17 W |
| Crawford Creek County Recreation Area | Park | 384 | Ida | 42 16 25 N | 095 36 16 W |
| Crawford Heights Memorial Cemetery | Cemetery | 401 | Crawford | 42 00 03 N | 095 20 50 W |
| Crawford Park | Park | 212 | Jackson | 42 04 36 N | 090 39 28 W |
| Crawford Pond Park | Park | 219 | Washington | 41 20 05 N | 091 32 37 W |
| Crawford Post Office (historical) | Post Office | 363 | Woodbury | 42 27 60 N | 096 12 31 W |
| Crawford Residence Hall | Building | 283 | Polk | 41 36 13 N | 093 39 27 W |
| Crawford School | School | 294 | Story | 42 01 07 N | 093 38 57 W |
| Crawfordsville | Populated Place | 216 | Washington | 41 14 39 N | 091 33 44 W |
| Crawfordsville (historical) | Locale | 222 | Washington | 41 13 03 N | 091 32 13 W |
| Crawfordsville Cemetery | Cemetery | 220 | Washington | 41 12 53 N | 091 32 51 W |
| Crawfordsville City Hall | Building | 222 | Washington | 41 12 51 N | 091 32 19 W |
| Crawfordsville Post Office | Post Office | 222 | Washington | 41 12 50 N | 091 32 19 W |
| Crawfordsville United Church | Church | 222 | Washington | 41 12 52 N | 091 32 17 W |
| Cream Hill Post Office (historical) | Post Office | 316 | Franklin | 42 46 05 N | 093 02 41 W |
| Creamer Cemetery | Cemetery | 210 | Lee | 40 45 56 N | 091 22 23 W |
| Creamery | Populated Place | 366 | Cerro Gordo | 43 13 15 N | 093 19 46 W |
| Creamery Post Office (historical) | Post Office | 366 | Cerro Gordo | 43 13 15 N | 093 19 46 W |
| Credit Island | Island | 169 | Scott | 41 29 36 N | 090 37 14 W |
| Credit Island Golf Course | Locale | 168 | Scott | 41 29 50 N | 090 36 50 W |
| Credit Island Park | Park | 168 | Scott | 41 29 50 N | 090 36 49 W |
| Creekside Park | Park | 209 | Johnson | 41 39 05 N | 091 30 31 W |
| Creel Cemetery | Cemetery | 217 | Lee | 40 44 50 N | 091 28 31 W |
| Crellin Wildlife Refuge | Park | 315 | Dallas | 41 43 40 N | 094 04 08 W |
| Cresaps Lateral Number 7 | Canal | 281 | Fremont | 40 41 47 N | 095 46 42 W |
| Crescent | Populated Place | 308 | Pottawattamie | 41 21 54 N | 095 51 29 W |
| Crescent Beach | Beach | 426 | Dickinson | 43 21 58 N | 095 10 11 W |
| Crescent Beach Resort | Populated Place | 426 | Dickinson | 43 21 58 N | 095 10 13 W |
| Crescent Cemetery | Cemetery | 331 | Pottawattamie | 41 22 00 N | 095 51 21 W |
| Crescent Creek | Stream | | Pottawattamie | 41 21 49 N | 095 52 26 W |
| Crescent Elementary School | School | 308 | Pottawattamie | 41 21 54 N | 095 51 29 W |
| Crescent Nursing and Rehabilitation Center | Hospital | 223 | Muscatine | 41 26 48 N | 091 05 06 W |
| Crescent Park Methodist Church | Church | 343 | Woodbury | 42 31 11 N | 096 25 20 W |
| Crescent Park School | School | 342 | Woodbury | 42 31 03 N | 096 25 19 W |
| Crescent Post Office | Post Office | 308 | Pottawattamie | 41 21 54 N | 095 51 29 W |
| Cresco | Populated Place | 394 | Howard | 43 22 53 N | 092 06 51 W |
| Cresco (historical) | Locale | 396 | Howard | 43 22 19 N | 092 06 58 W |
| Cresco Care Center | Hospital | 388 | Howard | 43 21 55 N | 092 07 29 W |
| Cresco City Hall | Building | 395 | Howard | 43 22 28 N | 092 06 57 W |
| Cresco City Library | Building | 396 | Howard | 43 22 33 N | 092 06 58 W |
| Cresco Family Dentistry Center | Hospital | 396 | Howard | 43 22 26 N | 092 06 60 W |
| Cresco Post Office | Post Office | 396 | Howard | 43 22 27 N | 092 07 04 W |
| Cresco Post Office (historical) | Post Office | 351 | Kossuth | 43 00 60 N | 094 15 31 W |
| Crest Baptist Church | Church | 400 | Union | 41 04 15 N | 094 21 17 W |
| Crest Haven Care Centre | Hospital | 400 | Union | 41 03 38 N | 094 20 56 W |
| Crestbruck Park | Park | 286 | Polk | 41 44 24 N | 093 35 31 W |
| Cresthaven School | School | 274 | Black Hawk | 42 27 51 N | 092 21 03 W |
| Crestland Co-op Elevator | Locale | 335 | Fremont | 40 52 46 N | 095 25 37 W |
| Crestland Co-op Elevator | Locale | 293 | Fremont | 40 43 15 N | 095 28 50 W |