Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Coppock (historical) | Locale | 193 | Henry | 41 09 44 N | 091 42 41 W |
| Coppock Access | Locale | 183 | Washington | 41 09 55 N | 091 43 31 W |
| Coppock Post Office (historical) | Post Office | 193 | Henry | 41 09 44 N | 091 42 41 W |
| Cora | Locale | 381 | Pocahontas | 42 35 18 N | 094 53 39 W |
| Cora B Darling Elementary and Middle School | School | 362 | Allamakee | 43 04 57 N | 091 34 19 W |
| Cora Post Office (historical) | Post Office | 326 | Decatur | 40 36 33 N | 093 59 44 W |
| Cora Post Office (historical) | Post Office | 214 | Des Moines | 40 53 56 N | 091 07 28 W |
| Coral Ridge Ice Arena | Building | 218 | Johnson | 41 41 30 N | 091 36 21 W |
| Coral Ridge Mall | Locale | 218 | Johnson | 41 41 30 N | 091 36 21 W |
| Coral Trailer Park | Populated Place | 208 | Johnson | 41 40 27 N | 091 34 31 W |
| Coralville | Locale | 206 | Johnson | 41 40 58 N | 091 35 56 W |
| Coralville | Populated Place | 208 | Johnson | 41 40 35 N | 091 34 50 W |
| Coralville City Hall | Building | 208 | Johnson | 41 40 41 N | 091 35 01 W |
| Coralville Dam | Dam | 226 | Johnson | 41 43 28 N | 091 31 47 W |
| Coralville Dam Complex Campgrounds | Locale | 233 | Johnson | 41 43 35 N | 091 32 11 W |
| Coralville Edgewater Campground | Locale | 198 | Johnson | 41 41 00 N | 091 33 26 W |
| Coralville Eye Clinic | Hospital | 208 | Johnson | 41 40 30 N | 091 34 43 W |
| Coralville Family Care Center | Hospital | 202 | Johnson | 41 40 40 N | 091 33 56 W |
| Coralville Fire Station | Building | 208 | Johnson | 41 40 40 N | 091 34 60 W |
| Coralville Lake | Reservoir | 236 | Johnson | 41 43 30 N | 091 37 48 W |
| Coralville Police Department | Building | 208 | Johnson | 41 40 41 N | 091 35 01 W |
| Coralville Post Office | Post Office | 208 | Johnson | 41 40 31 N | 091 34 43 W |
| Coralville Public Library | Building | 210 | Johnson | 41 40 39 N | 091 34 59 W |
| Coralville School (historical) | School | 201 | Johnson | 41 40 25 N | 091 34 16 W |
| Coralville United Methodist Church | Church | 226 | Johnson | 41 40 55 N | 091 34 55 W |
| Corbett's Mill Bridge | Bridge | 267 | Jones | 42 11 54 N | 091 04 27 W |
| Cordelia Swan Historical Marker | Park | 234 | Johnson | 41 40 14 N | 091 31 10 W |
| Corder Cemetery | Cemetery | 321 | Wayne | 40 38 51 N | 093 33 03 W |
| Cordova | Populated Place | 223 | Marion | 41 25 28 N | 093 05 46 W |
| Cordova (historical) | Locale | 223 | Marion | 41 25 28 N | 093 05 46 W |
| Cordova Park | Park | 249 | Marion | 41 26 00 N | 093 05 01 W |
| Cordova Post Office (historical) | Post Office | 223 | Marion | 41 25 28 N | 093 05 46 W |
| Cordova Slough | Stream | | Scott | 41 41 15 N | 090 19 49 W |
| Cords Cemetery | Cemetery | 243 | Clayton | 42 47 50 N | 091 26 17 W |
| Corey | Locale | 310 | Fremont | 40 48 00 N | 095 26 29 W |
| Corinthian Baptist Church | Church | 267 | Black Hawk | 42 30 20 N | 092 18 41 W |
| Corinthian Baptist Church | Church | 277 | Polk | 41 35 47 N | 093 37 41 W |
| Cork Hill Park | Park | 195 | Scott | 41 31 50 N | 090 33 53 W |
| Corley | Populated Place | 360 | Shelby | 41 34 43 N | 095 19 49 W |
| Corley (historical) | Locale | 360 | Shelby | 41 34 43 N | 095 19 49 W |
| Corley Post Office (historical) | Post Office | 360 | Shelby | 41 34 43 N | 095 19 49 W |
| Corn Hill | Summit | 364 | Fayette | 42 48 22 N | 091 44 13 W |
| Corn Hill (historical) | Locale | 335 | Fayette | 42 47 45 N | 091 44 41 W |
| Corn Hill Cemetery | Cemetery | 355 | Fayette | 42 47 30 N | 091 42 31 W |
| Corn Hill Post Office (historical) | Post Office | 335 | Fayette | 42 47 45 N | 091 44 41 W |
| Corn Valley (historical) | Locale | 402 | Sioux | 42 58 58 N | 096 21 31 W |
| Corn Valley Post Office (historical) | Post Office | 400 | Sioux | 42 58 58 N | 096 21 15 W |
| Cornelia | Locale | 374 | Wright | 42 47 24 N | 093 40 60 W |
| Cornelia | Populated Place | 374 | Wright | 42 47 24 N | 093 40 60 W |
| Cornelia Lake Bridge | Bridge | 366 | Wright | 42 47 30 N | 093 41 06 W |
| Cornelia Post Office (historical) | Post Office | 428 | Ida | 42 25 20 N | 095 35 41 W |
| Cornelia Post Office (historical) | Post Office | 366 | Wright | 42 47 30 N | 093 41 06 W |
| Cornell | Populated Place | 427 | Clay | 42 56 40 N | 095 08 24 W |
| Cornell (historical) | Locale | 427 | Clay | 42 56 40 N | 095 08 24 W |
| Cornell College | School | 273 | Linn | 41 55 33 N | 091 25 32 W |
| Cornell Elementary School | School | 283 | Polk | 41 39 54 N | 093 36 51 W |
| Cornell Post Office (historical) | Post Office | 427 | Clay | 42 56 40 N | 095 08 24 W |
| Cornerstone Alliance Church | Church | 340 | Boone | 42 03 43 N | 093 53 34 W |
| Cornerstone Baptist Church | Church | 293 | Polk | 41 43 53 N | 093 35 24 W |
| Cornerstone Baptist Church | Church | 290 | Polk | 41 38 50 N | 093 29 03 W |
| Cornerstone Baptist Church | Church | 240 | Scott | 41 39 15 N | 090 35 32 W |
| Cornerstone Christian School | School | 241 | Johnson | 41 41 50 N | 091 35 06 W |
| Cornerstone Church | Church | 284 | Black Hawk | 42 28 00 N | 092 20 14 W |
| Cornerstone Church | Church | 200 | Clinton | 41 49 35 N | 090 33 38 W |
| Cornerstone Church of Ames | Church | 272 | Story | 42 00 09 N | 093 36 25 W |
| Cornerstone Church of Christ | Church | 325 | Story | 42 09 44 N | 093 17 41 W |
| Cornerstone Church of God in Christ | Church | 337 | Webster | 42 30 55 N | 094 10 45 W |
| Cornerstone Church of the Nazarene | Church | 278 | Bremer | 42 43 44 N | 092 28 23 W |
| Cornerstone Community Church | Church | 311 | Lucas | 41 01 25 N | 093 18 41 W |
| Cornerstone Community Church | Church | 301 | Polk | 41 37 42 N | 093 47 40 W |
| Cornerstone Community Church | Church | 283 | Polk | 41 36 46 N | 093 39 40 W |
| Cornerstone Community Church | Church | 256 | Wapello | 41 03 12 N | 092 25 31 W |
| Cornerstone Evangelical Free Church | Church | 416 | Adair | 41 18 14 N | 094 27 39 W |
| Cornerstone Faith Center | Church | 390 | Woodbury | 42 28 30 N | 096 19 56 W |
| Cornerstone Family Church | Church | 262 | Polk | 41 33 22 N | 093 42 01 W |
| Cornerstone Fellowship Church | Church | 275 | Black Hawk | 42 29 14 N | 092 24 41 W |
| Cornerstone Foursquare Church | Church | 287 | Buchanan | 42 27 50 N | 091 55 11 W |
| Cornerstone Pentecostal Church | Church | 268 | Polk | 41 38 12 N | 093 33 42 W |
| Cornerstone United Reformed Church | Church | 473 | O'Brien | 43 11 06 N | 095 38 44 W |
| Corning | Locale | 343 | Adams | 40 59 13 N | 094 44 01 W |
| Corning | Populated Place | 364 | Adams | 40 59 24 N | 094 44 27 W |
| Corning Christian Church | Church | 341 | Adams | 40 58 48 N | 094 44 07 W |
| Corning City Hall | Building | 344 | Adams | 40 59 16 N | 094 44 07 W |
| Corning City Public Library | Building | 359 | Adams | 40 59 26 N | 094 44 07 W |
| Corning Elementary School | School | 355 | Adams | 40 59 38 N | 094 44 31 W |
| Corning Family Chiropractic Center | Hospital | 347 | Adams | 40 59 19 N | 094 44 09 W |
| Corning Fire Department | Building | 344 | Adams | 40 59 16 N | 094 44 07 W |
| Corning High School | School | 367 | Adams | 40 59 26 N | 094 44 24 W |
| Corning Junior High School | School | 369 | Adams | 40 59 30 N | 094 44 23 W |
| Corning Municipal Airport | Airport | 386 | Adams | 40 59 38 N | 094 45 18 W |
| Corning Nursing and Rehabilitation Center | Hospital | 361 | Adams | 40 59 57 N | 094 43 56 W |
| Corning Police Department | Building | 363 | Adams | 40 59 28 N | 094 44 05 W |
| Corning Post Office | Post Office | 351 | Adams | 40 59 22 N | 094 44 10 W |
| Cornwall Cemetery | Cemetery | 366 | Union | 40 54 17 N | 094 06 37 W |
| Corporate College Center | Building | 401 | Woodbury | 42 29 03 N | 096 20 49 W |
| Corpus Christi Catholic Church | Church | 331 | Webster | 42 30 32 N | 094 11 20 W |
| Corpus Christi Cemetery | Cemetery | 340 | Webster | 42 31 28 N | 094 10 50 W |
| Corpus Christi School | School | 333 | Webster | 42 30 33 N | 094 11 16 W |
| Correctionville | Populated Place | 343 | Woodbury | 42 28 30 N | 095 47 08 W |
| Correctionville (historical) | Locale | 343 | Woodbury | 42 28 30 N | 095 47 13 W |
| Correctionville Cemetery | Cemetery | 372 | Woodbury | 42 28 22 N | 095 46 15 W |
| Correctionville Family Medical Center | Hospital | 343 | Woodbury | 42 28 35 N | 095 47 07 W |
| Correctionville Golf Club | Locale | 348 | Woodbury | 42 29 10 N | 095 46 51 W |
| Correctionville Library | Building | 343 | Woodbury | 42 28 34 N | 095 47 07 W |
| Correctionville Mercy Medical Center | Hospital | 346 | Woodbury | 42 28 52 N | 095 46 35 W |
| Correctionville Nursing and Rehabilitation Center | Hospital | 346 | Woodbury | 42 28 51 N | 095 46 37 W |
| Correctionville Post Office | Post Office | 343 | Woodbury | 42 28 31 N | 095 47 11 W |
| Corse School | School | 212 | Des Moines | 40 48 08 N | 091 07 21 W |
| Corsepius Island | Island | 162 | Louisa | 41 09 03 N | 090 59 32 W |
| Corwith | Populated Place | 359 | Hancock | 42 59 34 N | 093 57 27 W |