Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Central School | School | 210 | Johnson | 41 40 34 N | 091 34 20 W |
| Central School | School | 376 | Plymouth | 42 47 21 N | 096 10 08 W |
| Central School | School | 304 | Polk | 41 49 15 N | 093 38 01 W |
| Central School Museum | Building | 378 | Calhoun | 42 15 58 N | 094 44 01 W |
| Central Vision Center | Hospital | 257 | Mahaska | 41 17 41 N | 092 38 46 W |
| Central Ward Elementary School | School | 305 | Appanoose | 40 43 51 N | 092 52 23 W |
| Central Webster High School | School | 347 | Webster | 42 20 32 N | 094 06 22 W |
| Centralia | Populated Place | 346 | Dubuque | 42 28 20 N | 090 50 13 W |
| Centralia Church | Church | 348 | Dubuque | 42 29 32 N | 090 50 00 W |
| Centralia Post Office (historical) | Post Office | 346 | Dubuque | 42 28 20 N | 090 50 13 W |
| Centralia Presbyterian Cemetery | Cemetery | 348 | Dubuque | 42 29 32 N | 090 49 57 W |
| Centre (historical) | Locale | 321 | Page | 40 35 36 N | 094 58 18 W |
| Centre for Obstetrics and Gynecology | Hospital | 351 | Boone | 42 03 22 N | 093 52 42 W |
| Centre Mall | Locale | 445 | Sioux | 43 04 45 N | 096 10 34 W |
| Centro Christian Emanuel Church | Church | 170 | Muscatine | 41 26 10 N | 091 02 16 W |
| Centrum Plaza | Locale | 273 | Winneshiek | 43 17 25 N | 091 47 44 W |
| Ceres | Populated Place | 314 | Clayton | 42 49 14 N | 091 11 10 W |
| Ceres Cemetery | Cemetery | 314 | Clayton | 42 49 23 N | 091 11 11 W |
| Ceres Church | Church | 312 | Clayton | 42 49 21 N | 091 11 16 W |
| Ceres Post Office (historical) | Post Office | 314 | Clayton | 42 49 14 N | 091 11 10 W |
| Cerro Gordo County | Civil | 369 | Cerro Gordo | 43 05 00 N | 093 16 01 W |
| Cerro Gordo County Courthouse | Building | 344 | Cerro Gordo | 43 09 11 N | 093 12 08 W |
| Cerro Gordo County Home | Building | 359 | Cerro Gordo | 43 08 44 N | 093 17 15 W |
| Cerro Gordo Post Office (historical) | Post Office | 295 | Mills | 41 07 20 N | 095 51 36 W |
| Cerro Gordo Wind Farm | Locale | 384 | Cerro Gordo | 43 04 10 N | 093 28 36 W |
| Cessford Post Office (historical) | Post Office | 250 | Cedar | 41 48 30 N | 091 03 51 W |
| Chadwick Library | Building | 217 | Henry | 40 58 25 N | 091 33 26 W |
| Chain Lake (historical) | Lake | 379 | Osceola | 42 22 29 N | 095 25 07 W |
| Chain Lakes Airpark | Airport | 247 | Linn | 42 03 05 N | 091 43 01 W |
| Chain Lakes Bridge | Bridge | 219 | Linn | 42 02 60 N | 091 46 32 W |
| Chain Lakes County Park | Park | 222 | Linn | 42 03 10 N | 091 46 15 W |
| Chain Lakes Landing Strip | Airport | 244 | Linn | 42 03 13 N | 091 42 57 W |
| Chain-O-Lakes Wildlife Management Area | Park | 222 | Linn | 42 04 20 N | 091 46 21 W |
| Chalmers Field | Park | 263 | Dubuque | 42 29 42 N | 090 41 48 W |
| Chalstroms Beach | Beach | 426 | Dickinson | 43 23 14 N | 095 06 51 W |
| Chalybeate Springs Post Office (historical) | Post Office | 256 | Jasper | 41 40 40 N | 093 14 31 W |
| Chamber Cemetery | Cemetery | 310 | Fremont | 40 47 11 N | 095 30 31 W |
| Chamberlain Park | Park | 277 | Jones | 42 06 13 N | 091 00 46 W |
| Chambers Cemetery | Cemetery | 401 | Harrison | 41 36 07 N | 095 34 06 W |
| Chambers Cemetery | Cemetery | 284 | Tama | 41 52 14 N | 092 21 14 W |
| Chambers Ford Bridge | Bridge | 233 | Tama | 41 53 03 N | 092 20 08 W |
| Chamness Cemetery | Cemetery | 234 | Cedar | 41 39 35 N | 091 19 06 W |
| Champion Hill Cemetery | Cemetery | 244 | Iowa | 41 32 56 N | 091 54 52 W |
| Champion Hill Church | Church | 216 | Iowa | 41 33 04 N | 092 02 18 W |
| Champion Hill Church | Church | 372 | Mills | 40 58 01 N | 095 23 37 W |
| Champion Hill School (historical) | School | 226 | Muscatine | 41 34 28 N | 091 07 12 W |
| Champlin Cemetery | Cemetery | 355 | Harrison | 41 30 44 N | 095 34 37 W |
| Chancy Fire Department | Building | 196 | Clinton | 41 49 35 N | 090 13 06 W |
| Chancy Lutheran Church | Church | 194 | Clinton | 41 49 27 N | 090 12 49 W |
| Chancy Park | Park | 192 | Clinton | 41 49 26 N | 090 12 42 W |
| Chandler Cemetery | Cemetery | 170 | Des Moines | 40 44 27 N | 091 09 07 W |
| Chandler Post Office (historical) | Post Office | 245 | Keokuk | 41 27 54 N | 091 58 18 W |
| Chaney | Populated Place | 180 | Clinton | 41 47 41 N | 090 17 04 W |
| Chaney Cemetery | Cemetery | 344 | Clarke | 40 55 15 N | 093 42 59 W |
| Changing Hearts Church | Church | 317 | Pottawattamie | 41 16 24 N | 095 46 41 W |
| Channingville Post Office (historical) | Post Office | 251 | Dubuque | 42 29 05 N | 090 53 00 W |
| Chapel Hill (historical) | Populated Place | 177 | Scott | 41 29 32 N | 090 38 51 W |
| Chapel Hill Cemetery | Cemetery | 313 | Marshall | 42 07 34 N | 092 46 02 W |
| Chapel Hill Cemetery | Cemetery | 388 | Worth | 43 18 07 N | 093 26 34 W |
| Chapel Hill Church | Church | 308 | Marshall | 42 07 25 N | 092 46 02 W |
| Chapel Hill Gardens Cemetery | Cemetery | 284 | Polk | 41 38 20 N | 093 42 03 W |
| Chapin | Locale | 352 | Franklin | 42 50 05 N | 093 13 16 W |
| Chapin | Populated Place | 352 | Franklin | 42 50 01 N | 093 13 20 W |
| Chapin Park | Park | 314 | Bremer | 42 48 29 N | 092 15 30 W |
| Chapin Post Office | Post Office | 352 | Franklin | 42 50 01 N | 093 13 20 W |
| Chapman Cemetery | Cemetery | 207 | Van Buren | 40 42 45 N | 091 46 22 W |
| Charitan River Cemetery | Cemetery | 299 | Appanoose | 40 51 37 N | 093 02 34 W |
| Chariton | Locale | 316 | Lucas | 41 01 12 N | 093 18 51 W |
| Chariton | Populated Place | 313 | Lucas | 41 00 50 N | 093 18 24 W |
| Chariton Bible Church | Church | 310 | Lucas | 41 01 01 N | 093 18 59 W |
| Chariton Cemetery | Cemetery | 306 | Lucas | 41 00 10 N | 093 18 36 W |
| Chariton City Hall | Building | 313 | Lucas | 41 00 51 N | 093 18 31 W |
| Chariton City Library | Building | 313 | Lucas | 41 00 57 N | 093 18 21 W |
| Chariton Creek | Stream | | Clarke | 40 56 17 N | 093 33 13 W |
| Chariton Family Aquatic Center | Park | 311 | Lucas | 41 01 29 N | 093 18 53 W |
| Chariton Fire Department | Building | 313 | Lucas | 41 00 56 N | 093 18 21 W |
| Chariton High School | School | 315 | Lucas | 41 01 12 N | 093 18 26 W |
| Chariton Medical Clinic | Hospital | 311 | Lucas | 41 01 35 N | 093 18 11 W |
| Chariton Middle School | School | 311 | Lucas | 41 01 46 N | 093 19 01 W |
| Chariton Municipal Airport | Airport | 317 | Lucas | 41 01 10 N | 093 21 35 W |
| Chariton Nursing and Rehabilitation Center | Hospital | 313 | Lucas | 41 01 44 N | 093 18 06 W |
| Chariton Post Office | Post Office | 314 | Lucas | 41 00 49 N | 093 18 24 W |
| Chariton River | Stream | | Appanoose | 39 14 30 N | 092 51 11 W |
| Chariton River Church | Church | 305 | Appanoose | 40 51 22 N | 093 02 43 W |
| Chariton Valley Medical Center | Hospital | 306 | Appanoose | 40 43 41 N | 092 52 22 W |
| Charity Flat School | School | 298 | Buchanan | 42 35 58 N | 091 56 56 W |
| Charles A Mock Library | Building | 397 | Plymouth | 42 46 50 N | 096 09 45 W |
| Charles C Myers Library | Building | 269 | Dubuque | 42 29 50 N | 090 41 36 W |
| Charles City | Civil | 305 | Floyd | 43 04 02 N | 092 40 31 W |
| Charles City | Populated Place | 307 | Floyd | 43 03 59 N | 092 40 21 W |
| Charles City City Hall | Building | 304 | Floyd | 43 03 58 N | 092 40 38 W |
| Charles City Family Health Center | Hospital | 323 | Floyd | 43 03 00 N | 092 40 59 W |
| Charles City Fire Department | Building | 303 | Floyd | 43 03 36 N | 092 40 21 W |
| Charles City Hall | Building | 383 | Woodbury | 42 28 30 N | 096 21 33 W |
| Charles City High School | School | 320 | Floyd | 43 03 44 N | 092 39 25 W |
| Charles City Junior High School | School | 308 | Floyd | 43 04 06 N | 092 40 16 W |
| Charles City Municipal Airport | Airport | 342 | Floyd | 43 04 21 N | 092 36 39 W |
| Charles City Police Station | Building | 304 | Floyd | 43 03 58 N | 092 40 38 W |
| Charles City Post Office | Post Office | 306 | Floyd | 43 04 08 N | 092 40 37 W |
| Charles City Public Library | Building | 304 | Floyd | 43 03 58 N | 092 40 38 W |
| Charles City Trail | Trail | 298 | Floyd | 43 03 43 N | 092 40 22 W |
| Charles H MacNider Museum | Building | 330 | Cerro Gordo | 43 08 58 N | 093 11 43 W |
| Charles Harry Historical Marker | Park | 256 | Cedar | 41 45 34 N | 091 09 07 W |
| Charles Shepherd Historical Marker | Park | 216 | Henry | 40 57 05 N | 091 32 31 W |
| Charleston | Populated Place | 214 | Lee | 40 35 27 N | 091 31 53 W |
| Charleston (historical) | Locale | 214 | Lee | 40 35 27 N | 091 31 53 W |
| Charleston Cemetery | Cemetery | 207 | Lee | 40 35 11 N | 091 31 51 W |
| Charleston Post Office (historical) | Post Office | 214 | Lee | 40 35 27 N | 091 31 53 W |
| Charleston Roadside Park | Park | 213 | Lee | 40 35 34 N | 091 32 01 W |
| Charlie Island | Island | 161 | Des Moines | 41 00 46 N | 090 57 17 W |