Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Rands | Populated Place | 360 | Calhoun | 42 19 30 N | 094 34 44 W |
| Rands (historical) | Locale | 360 | Calhoun | 42 19 30 N | 094 34 44 W |
| Rands Post Office (historical) | Post Office | 360 | Calhoun | 42 19 30 N | 094 34 44 W |
| Rankin Cemetery | Cemetery | 330 | Wayne | 40 40 19 N | 093 20 11 W |
| Ranney Knob County Park | Park | 344 | Cherokee | 42 34 12 N | 095 44 08 W |
| Ransom School | School | 361 | Pottawattamie | 41 29 29 N | 095 37 46 W |
| Ransom Wildlife Management Area | Park | 498 | Osceola | 43 29 00 N | 095 44 21 W |
| Rapid Creek | Stream | | Cerro Gordo | 42 58 42 N | 093 00 30 W |
| Rapid Creek | Stream | | Johnson | 41 41 51 N | 091 32 20 W |
| Rapid Street Baptist Church | Church | 284 | Dallas | 41 37 08 N | 094 01 42 W |
| Rapids Chiropractic Clinic | Hospital | 420 | Lyon | 43 25 22 N | 096 10 28 W |
| Rarick Cemetery | Cemetery | 287 | Black Hawk | 42 32 47 N | 092 33 14 W |
| Rashid Idol Memorial Library | Building | 170 | Lee | 40 37 34 N | 091 21 27 W |
| Rat Creek | Stream | | Lyon | 43 15 47 N | 095 56 21 W |
| Rat Run | Stream | | Clinton | 42 02 16 N | 090 51 16 W |
| Rater Post Office (historical) | Post Office | 209 | Davis | 40 53 47 N | 092 25 21 W |
| Rathbun | Locale | 264 | Appanoose | 40 47 53 N | 092 53 15 W |
| Rathbun | Populated Place | 286 | Appanoose | 40 48 04 N | 092 53 20 W |
| Rathbun Cemetery | Cemetery | 259 | Jackson | 42 02 24 N | 090 33 22 W |
| Rathbun Dam | Dam | 270 | Appanoose | 40 50 07 N | 092 52 13 W |
| Rathbun Fish Hatchery | Locale | 288 | Appanoose | 40 49 50 N | 092 52 26 W |
| Rathbun Lake | Reservoir | 276 | Appanoose | 40 49 36 N | 092 53 13 W |
| Rathbun Lake Airport | Airport | 300 | Appanoose | 40 51 06 N | 092 51 31 W |
| Rathbun Mentoal Health Center | Hospital | 333 | Wayne | 40 45 30 N | 093 19 08 W |
| Rathbun Post Office (historical) | Post Office | 286 | Appanoose | 40 48 04 N | 092 53 20 W |
| Rathbun Research Center | Building | 288 | Appanoose | 40 49 50 N | 092 52 26 W |
| Rathbun State Resort Area | Park | 298 | Appanoose | 40 52 47 N | 092 55 56 W |
| Rathbun State Wildlife Area | Park | 293 | Lucas | 40 53 57 N | 093 05 54 W |
| Rathburn Creek | Stream | | Plymouth | 42 40 32 N | 095 59 59 W |
| Rathon Post Office (historical) | Post Office | 354 | Hardin | 42 32 22 N | 093 08 53 W |
| Ratna (historical) | Populated Place | 380 | Winnebago | 43 19 40 N | 093 33 21 W |
| Ratna Post Office (historical) | Post Office | 380 | Winnebago | 43 19 40 N | 093 33 21 W |
| Raven Creek | Stream | | Tama | 41 58 27 N | 092 39 43 W |
| Ravenwood Health Care Center | Hospital | 284 | Black Hawk | 42 27 40 N | 092 20 43 W |
| Ravine Park | Park | 364 | Woodbury | 42 27 17 N | 096 22 09 W |
| Rawson Residence Hall | Building | 311 | Poweshiek | 41 45 02 N | 092 43 20 W |
| Ray House | Building | 248 | Benton | 42 09 44 N | 092 01 27 W |
| Ray Lake | Lake | 158 | Des Moines | 41 00 12 N | 090 59 23 W |
| Ray Post Office (historical) | Post Office | 299 | Appanoose | 40 51 20 N | 092 51 51 W |
| Ray Rorick Park | Park | 348 | Cerro Gordo | 43 08 15 N | 093 13 21 W |
| Ray Thomas Wildlife Preserve | Park | 326 | Mills | 41 05 00 N | 095 30 56 W |
| Ray Tiller Park | Park | 268 | Black Hawk | 42 31 44 N | 092 21 21 W |
| Rayburn Cemetery | Cemetery | 244 | Keokuk | 41 11 56 N | 092 17 45 W |
| Raymar | Populated Place | 255 | Black Hawk | 42 27 19 N | 092 14 25 W |
| Raymond | Locale | 272 | Black Hawk | 42 27 60 N | 092 13 10 W |
| Raymond | Populated Place | 277 | Black Hawk | 42 28 08 N | 092 13 11 W |
| Raymond City Hall | Building | 276 | Black Hawk | 42 28 07 N | 092 13 03 W |
| Raymond Park | Park | 277 | Black Hawk | 42 27 55 N | 092 13 41 W |
| Raymond Post Office | Post Office | 272 | Black Hawk | 42 28 01 N | 092 13 10 W |
| Raymond United Methodist Church | Church | 277 | Black Hawk | 42 28 09 N | 092 13 04 W |
| RC and Celeste Wahlert Atrium | Building | 253 | Dubuque | 42 30 33 N | 090 41 27 W |
| RD Mitchell Park | Park | 340 | Webster | 42 30 32 N | 094 09 46 W |
| Read Post Office (historical) | Post Office | 301 | Clayton | 42 53 13 N | 091 19 45 W |
| Read Residence Hall | Building | 311 | Poweshiek | 41 44 55 N | 092 43 03 W |
| Read Township Culvert | Bridge | 274 | Clayton | 42 50 00 N | 091 19 10 W |
| Readers Mills (historical) | Locale | 362 | Harrison | 41 36 15 N | 095 43 38 W |
| Reading Cemetery | Cemetery | 350 | Calhoun | 42 15 34 N | 094 25 58 W |
| Reading Creek | Stream | | Greene | 42 12 11 N | 094 26 04 W |
| Readlyn | Locale | 314 | Bremer | 42 42 01 N | 092 13 31 W |
| Readlyn | Populated Place | 315 | Bremer | 42 42 08 N | 092 13 32 W |
| Readlyn City Hall | Building | 315 | Bremer | 42 42 05 N | 092 13 31 W |
| Readlyn Community Library | Building | 316 | Bremer | 42 42 11 N | 092 13 32 W |
| Readlyn Elementary School | School | 316 | Bremer | 42 42 14 N | 092 13 26 W |
| Readlyn Farm Center Incorporated Elevator | Locale | 314 | Bremer | 42 42 01 N | 092 13 34 W |
| Readlyn Post Office | Post Office | 315 | Bremer | 42 42 08 N | 092 13 31 W |
| Reasnor | Populated Place | 233 | Jasper | 41 34 42 N | 093 01 24 W |
| Reasnor (historical) | Locale | 232 | Jasper | 41 34 37 N | 093 01 26 W |
| Reasnor City Hall | Building | 233 | Jasper | 41 34 42 N | 093 01 24 W |
| Reasnor Creek | Stream | | Jasper | 41 34 40 N | 093 02 22 W |
| Reasnor Post Office | Post Office | 233 | Jasper | 41 34 42 N | 093 01 24 W |
| Reasoner Cemetery | Cemetery | 310 | Union | 40 58 08 N | 094 01 39 W |
| Reasoner Dam | Dam | 329 | Humboldt | 42 43 37 N | 094 13 45 W |
| Reasoner School | School | 335 | Mills | 41 01 41 N | 095 42 00 W |
| Reckner Cemetery | Cemetery | 373 | Howard | 43 16 28 N | 092 30 56 W |
| Recreation Building | Building | 221 | Johnson | 41 39 34 N | 091 33 13 W |
| Recreation Center | Building | 222 | Jefferson | 41 01 00 N | 091 57 51 W |
| Rector Cemetery | Cemetery | 326 | Fremont | 40 42 30 N | 095 41 01 W |
| Rector Cemetery | Cemetery | 290 | Tama | 41 52 52 N | 092 24 17 W |
| Red Barn Model Railroad Museum | Building | 307 | Delaware | 42 35 50 N | 091 31 55 W |
| Red Barn Resort and Campground | Locale | 224 | Allamakee | 43 21 41 N | 091 14 55 W |
| Red Brick School (historical) | School | 290 | Polk | 41 42 32 N | 093 36 03 W |
| Red Bridge | Bridge | 238 | Allamakee | 43 07 51 N | 091 25 29 W |
| Red Bridge | Bridge | 226 | Jasper | 41 32 29 N | 093 01 16 W |
| Red Carpet Golf Course | Locale | 268 | Black Hawk | 42 30 60 N | 092 19 11 W |
| Red Cedar Mills Post Office (historical) | Post Office | 232 | Marion | 41 14 00 N | 092 55 06 W |
| Red Cedar Wildlife Area | Park | 183 | Muscatine | 41 27 06 N | 091 16 21 W |
| Red Fern Timber Reserve | Park | 335 | Clarke | 40 59 00 N | 093 45 26 W |
| Red Fox Wildlife Area | Park | 238 | Benton | 42 14 15 N | 092 02 31 W |
| Red Gate Park | Park | 308 | Fayette | 42 40 38 N | 091 56 12 W |
| Red Haw Lake | Reservoir | 293 | Lucas | 41 00 05 N | 093 16 20 W |
| Red Haw State Park | Park | 298 | Lucas | 40 59 45 N | 093 16 46 W |
| Red Hawk Golf Course | Locale | 221 | Scott | 41 35 02 N | 090 36 30 W |
| Red Keel Creek | Stream | | Lee | 40 42 37 N | 091 18 37 W |
| Red Line | Populated Place | 384 | Shelby | 41 43 02 N | 095 09 04 W |
| Red Line Cemetery | Cemetery | 391 | Shelby | 41 43 04 N | 095 09 06 W |
| Red Nose Point | Cape | 431 | Dickinson | 43 28 10 N | 095 05 00 W |
| Red Oak | Locale | 321 | Montgomery | 41 00 05 N | 095 13 59 W |
| Red Oak | Populated Place | 320 | Montgomery | 41 00 35 N | 095 13 32 W |
| Red Oak Assembly of God Church | Church | 342 | Montgomery | 41 01 35 N | 095 13 14 W |
| Red Oak Cemetery | Cemetery | 244 | Cedar | 41 50 12 N | 091 09 28 W |
| Red Oak Chiropractic Office | Hospital | 315 | Montgomery | 41 01 04 N | 095 14 01 W |
| Red Oak Church | Church | 247 | Cedar | 41 50 14 N | 091 09 28 W |
| Red Oak Country Club | Locale | 367 | Montgomery | 41 00 51 N | 095 11 09 W |
| Red Oak Creek | Stream | | Montgomery | 41 00 20 N | 095 14 36 W |
| Red Oak Fire Department | Building | 315 | Montgomery | 41 01 18 N | 095 13 56 W |
| Red Oak Good Samaritan Center | Hospital | 316 | Montgomery | 41 01 26 N | 095 13 49 W |
| Red Oak High School | School | 320 | Montgomery | 41 01 26 N | 095 13 30 W |
| Red Oak Internal Medicine Clinic | Hospital | 358 | Montgomery | 41 01 38 N | 095 12 53 W |
| Red Oak Internal Medicine Clinic | Hospital | 329 | Montgomery | 40 55 42 N | 094 58 38 W |
| Red Oak Junior High School | School | 316 | Montgomery | 41 00 41 N | 095 13 44 W |