Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Chicasaw Hall | Building | 280 | Black Hawk | 42 25 48 N | 092 19 55 W |
| Chichaqua Wildlife Habitat Park | Park | 247 | Polk | 41 47 02 N | 093 24 48 W |
| Chick-A-Dee Garden | Locale | 297 | Chickasaw | 42 57 08 N | 092 32 11 W |
| Chickasaw | Populated Place | 326 | Chickasaw | 43 02 02 N | 092 29 43 W |
| Chickasaw County | Civil | 354 | Chickasaw | 43 04 00 N | 092 19 01 W |
| Chickasaw County Courthouse | Building | 355 | Chickasaw | 43 03 39 N | 092 18 53 W |
| Chickasaw County Home | Building | 334 | Chickasaw | 43 01 33 N | 092 19 05 W |
| Chickasaw County Museum | Building | 296 | Chickasaw | 42 57 32 N | 092 31 36 W |
| Chickasaw County Park | Park | 306 | Chickasaw | 43 02 05 N | 092 30 21 W |
| Chickasaw County Sheriffs Office | Building | 354 | Chickasaw | 43 03 39 N | 092 18 56 W |
| Chickasaw Post Office (historical) | Post Office | 326 | Chickasaw | 43 02 02 N | 092 29 43 W |
| Chicken Creek | Stream | | Marshall | 42 05 26 N | 092 57 04 W |
| Chicken Creek | Stream | | Muscatine | 41 29 00 N | 091 10 19 W |
| Chicken Ridge | Summit | 355 | Clayton | 42 48 48 N | 091 26 28 W |
| Chicken Ridge Scenic Overlook Park | Park | 353 | Clayton | 42 48 15 N | 091 25 00 W |
| Chief Black Hawk Statue | Park | 374 | Sac | 42 18 30 N | 095 02 31 W |
| Chief Hard Fish Historical Marker | Park | 231 | Wapello | 41 09 40 N | 092 37 39 W |
| Chief Keokuk Memorial Historical Marker | Park | 195 | Lee | 40 24 42 N | 091 22 49 W |
| Chief Mahaska Statue | Park | 257 | Mahaska | 41 17 42 N | 092 38 41 W |
| Chief Tama Grave | Cemetery | 206 | Des Moines | 40 52 32 N | 091 05 31 W |
| Chief Wapello Cemetery | Cemetery | 247 | Wapello | 40 59 30 N | 092 17 33 W |
| Chief Wapello's Grave Historical Marker | Park | 247 | Wapello | 40 59 30 N | 092 17 33 W |
| Chief War Eagle's Grave Historical Marker | Park | 354 | Woodbury | 42 29 38 N | 096 27 17 W |
| Chihaks Creek | Stream | | Howard | 43 19 48 N | 092 05 00 W |
| Chilcott Cemetery | Cemetery | 229 | Jefferson | 41 03 15 N | 091 49 21 W |
| Child Development Center | Building | 247 | Wapello | 41 02 45 N | 092 23 41 W |
| Child Development Lab | Building | 279 | Story | 42 01 26 N | 093 38 24 W |
| Child Health Specialty Clinic | Hospital | 193 | Des Moines | 40 48 48 N | 091 06 10 W |
| Child Health Specialty Clinic | Hospital | 260 | Dubuque | 42 30 39 N | 090 43 18 W |
| Child Health Specialty Clinic | Hospital | 203 | Wapello | 41 00 55 N | 092 24 31 W |
| Child Health Specialty Clinic | Hospital | 338 | Webster | 42 30 03 N | 094 10 54 W |
| Child Health Specialty Clinics | Hospital | 391 | Carroll | 42 04 06 N | 094 52 10 W |
| Child Health Specialty Clinics | Hospital | 207 | Scott | 41 32 40 N | 090 35 40 W |
| Children of Israel Cemetery | Cemetery | 350 | Chickasaw | 43 03 30 N | 092 19 31 W |
| Children's Hospital Physicians Center | Hospital | 297 | Polk | 41 36 02 N | 093 47 25 W |
| Childrens Christian Academy | School | 213 | Des Moines | 40 46 59 N | 091 06 42 W |
| Childrens Hospital of Iowa | Hospital | 219 | Johnson | 41 39 41 N | 091 32 52 W |
| Childrens Park | Park | 431 | Sioux | 43 04 15 N | 096 10 06 W |
| Childrens Park | Park | 350 | Woodbury | 42 30 21 N | 096 25 39 W |
| Childrens Square USA | Locale | 309 | Pottawattamie | 41 15 56 N | 095 51 09 W |
| Childs Access County Park | Park | 287 | Black Hawk | 42 37 07 N | 092 07 44 W |
| Chillicothe | Locale | 202 | Wapello | 41 05 14 N | 092 31 41 W |
| Chillicothe | Populated Place | 209 | Wapello | 41 05 08 N | 092 31 46 W |
| Chillicothe Cemetery | Cemetery | 213 | Wapello | 41 05 21 N | 092 32 01 W |
| Chillicothe Post Office | Post Office | 209 | Wapello | 41 05 08 N | 092 31 46 W |
| Chimney Rock | Summit | 258 | Jones | 42 13 12 N | 091 04 55 W |
| Chimney Rock Canoe Rental and Campground | Locale | 396 | Howard | 43 22 28 N | 092 07 01 W |
| Chimney Rock Canoe Rental and Campground | Locale | 305 | Winneshiek | 43 24 45 N | 091 56 31 W |
| Chimney Rock Indian Bluffs State Game Mgt Ar | Park | 277 | Jones | 42 12 59 N | 091 04 26 W |
| Chimney Rock Park | Park | 306 | Winneshiek | 43 25 30 N | 091 56 21 W |
| Chinese Evangelical Free Church | Church | 291 | Story | 42 02 39 N | 093 38 13 W |
| Chinquapin School | School | 293 | Lucas | 41 00 07 N | 093 32 18 W |
| Chipera Prairie Park | Park | 352 | Winneshiek | 43 07 45 N | 092 01 06 W |
| Chippewa Creek | Stream | | Wapello | 40 55 26 N | 092 14 17 W |
| Chiropractic Associates Building | Hospital | 372 | Plymouth | 42 47 21 N | 096 10 23 W |
| Chiropractic Associates Center | Hospital | 443 | Dickinson | 43 24 58 N | 095 07 29 W |
| Chiropractic Associates of Siouxland Building | Hospital | 438 | Sioux | 43 00 24 N | 096 03 34 W |
| Chiropractic Clinic | Hospital | 436 | Dickinson | 43 19 15 N | 095 09 01 W |
| Chiropractic Clinic | Hospital | 376 | Plymouth | 42 47 36 N | 096 09 56 W |
| Chiropractic Health Center | Hospital | 276 | Marion | 41 19 00 N | 093 05 51 W |
| Chiropractic Health Center | Hospital | 288 | Monroe | 41 01 06 N | 092 48 27 W |
| Chiropractic Health Center | Hospital | 378 | Plymouth | 42 47 33 N | 096 09 37 W |
| Chiropractic Offices | Hospital | 262 | Winneshiek | 43 18 16 N | 091 46 56 W |
| Chiropractic Wellness Center | Hospital | 366 | Kossuth | 43 04 10 N | 094 14 07 W |
| Chisholm Post Office (historical) | Post Office | 271 | Monroe | 41 04 31 N | 092 43 49 W |
| Chisman Cemetery | Cemetery | 257 | Wapello | 41 01 23 N | 092 33 41 W |
| Chlapaty Sports Complex | Locale | 263 | Dubuque | 42 29 43 N | 090 41 50 W |
| Cholera Hill Cemetery | Cemetery | 195 | Henry | 40 58 50 N | 091 39 11 W |
| Chris Larsen Park | Park | 331 | Woodbury | 42 29 26 N | 096 25 31 W |
| Chris Larson Trail | Trail | 336 | Woodbury | 42 29 32 N | 096 24 36 W |
| Christ Apostolic Church | Church | 175 | Lee | 40 23 55 N | 091 22 53 W |
| Christ Apostolic Church | Church | 180 | Scott | 41 31 31 N | 090 35 29 W |
| Christ Apostolic Faith Temple | Church | 280 | Story | 42 01 30 N | 093 36 55 W |
| Christ Apostolic Temple | Church | 259 | Polk | 41 36 03 N | 093 35 36 W |
| Christ Chapel | Church | 173 | Scott | 41 30 34 N | 090 37 33 W |
| Christ Chapel | Church | 438 | Sioux | 42 59 57 N | 096 03 26 W |
| Christ Church | Church | 428 | Plymouth | 42 51 05 N | 096 17 26 W |
| Christ Community Bible Church | Church | 280 | Polk | 41 37 21 N | 093 41 51 W |
| Christ Community Church | Church | 340 | Hardin | 42 31 12 N | 093 15 53 W |
| Christ Community Church | Church | 263 | Linn | 42 03 00 N | 091 36 45 W |
| Christ Community Church | Church | 442 | Sioux | 43 05 14 N | 096 10 01 W |
| Christ Community Fellowship | Church | 306 | Harrison | 41 33 26 N | 095 53 41 W |
| Christ Episcopal Church | Church | 201 | Des Moines | 40 48 50 N | 091 06 16 W |
| Christ Episcopal Church | Church | 253 | Linn | 42 01 13 N | 091 38 08 W |
| Christ Family Reformed Church | Church | 209 | Scott | 41 34 06 N | 090 30 55 W |
| Christ Holiness Apostolic Temple | Church | 238 | Linn | 41 58 15 N | 091 41 56 W |
| Christ Lutheran Cemetery | Cemetery | 428 | Plymouth | 42 51 05 N | 096 17 25 W |
| Christ Lutheran Church | Church | 280 | Black Hawk | 42 30 43 N | 092 23 49 W |
| Christ Lutheran Church | Church | 296 | Dallas | 41 51 45 N | 094 01 39 W |
| Christ Lutheran Church | Church | 324 | Greene | 42 00 10 N | 094 22 36 W |
| Christ Lutheran Church | Church | 403 | Lyon | 43 20 32 N | 096 18 04 W |
| Christ Lutheran Church | Church | 412 | Plymouth | 42 48 42 N | 095 58 23 W |
| Christ Lutheran Church | Church | 286 | Polk | 41 31 33 N | 093 36 21 W |
| Christ Lutheran Church | Church | 314 | Tama | 42 10 54 N | 092 43 02 W |
| Christ Lutheran Church | Church | 337 | Webster | 42 31 09 N | 094 10 02 W |
| Christ Our Savior Lutheran Church | Church | 265 | Warren | 41 28 20 N | 093 41 06 W |
| Christ Presbyterian Church | Church | 234 | Linn | 41 58 16 N | 091 42 04 W |
| Christ Resurrection Church | Church | 372 | Woodbury | 42 30 10 N | 096 26 01 W |
| Christ Temple Apostolic Church | Church | 263 | Black Hawk | 42 29 22 N | 092 20 25 W |
| Christ the King Catholic Community | Church | 444 | Sioux | 43 04 50 N | 096 10 28 W |
| Christ the King Chapel | Church | 258 | Dubuque | 42 30 13 N | 090 40 51 W |
| Christ the King Chapel | Church | 213 | Scott | 41 32 24 N | 090 34 52 W |
| Christ the King Church | Church | 226 | Johnson | 41 39 23 N | 091 34 28 W |
| Christ the King Church | Church | 284 | Polk | 41 32 03 N | 093 37 32 W |
| Christ the King Church | Church | 342 | Webster | 42 15 60 N | 094 04 25 W |
| Christ the King Lutheran Church | Church | 400 | Clay | 43 07 60 N | 095 08 59 W |
| Christ the King Lutheran Church | Church | 226 | Johnson | 41 39 23 N | 091 34 28 W |
| Christ the King Lutheran Church | Church | 294 | Polk | 41 39 20 N | 093 27 53 W |
| Christ the King School/Saint Bernard Center | School | 419 | Carroll | 42 11 02 N | 094 58 39 W |
| Christ the Servant Lutheran Church | Church | 324 | Wayne | 40 45 24 N | 093 19 32 W |