Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Rest Area 37 | Locale | 380 | Cerro Gordo | 43 10 35 N | 093 21 29 W |
| Rest Area 38 | Locale | 378 | Cerro Gordo | 43 10 33 N | 093 21 16 W |
| Resthaven Cemetery | Cemetery | 394 | Plymouth | 42 50 15 N | 096 10 08 W |
| Resthaven Cemetery | Cemetery | 281 | Polk | 41 34 50 N | 093 43 49 W |
| Restland Cemetery | Cemetery | 303 | Jasper | 41 49 09 N | 093 09 18 W |
| Restoration Marsh | Park | 347 | Floyd | 43 11 35 N | 092 43 01 W |
| Restoration Misistries | Church | 285 | Polk | 41 36 00 N | 093 38 08 W |
| Resurrection Cemetery | Cemetery | 283 | Dubuque | 42 30 57 N | 090 44 44 W |
| Resurrection Cemetery | Cemetery | 342 | Guthrie | 41 41 15 N | 094 27 19 W |
| Resurrection Lutheran Church | Church | 260 | Linn | 42 02 31 N | 091 34 60 W |
| Resurrection Lutheran Church | Church | 297 | Polk | 41 44 25 N | 093 36 48 W |
| Resurrection of Our Lord Church | Church | 372 | Pocahontas | 42 43 50 N | 094 40 09 W |
| Resurrection School | School | 285 | Dubuque | 42 31 00 N | 090 44 11 W |
| Reuggen Park | Park | 370 | Woodbury | 42 28 30 N | 096 20 40 W |
| Reveal School | School | 212 | Wapello | 41 03 35 N | 092 28 04 W |
| Revelation Light of Jesus Christ Church | Church | 369 | Taylor | 40 40 35 N | 094 43 31 W |
| Rex 4 Mine | Mine | 266 | Monroe | 41 06 44 N | 092 53 27 W |
| Rex Mathes School | School | 265 | Polk | 41 34 42 N | 093 43 24 W |
| Rex Number 4 | Locale | 284 | Monroe | 41 06 44 N | 092 53 48 W |
| Rex Post Office (historical) | Post Office | 328 | Allamakee | 43 23 60 N | 091 25 50 W |
| Rex Post Office (historical) | Post Office | 233 | Mahaska | 41 11 45 N | 092 51 41 W |
| Rex Sullivan Wildlife Area | Park | 391 | Adair | 41 10 35 N | 094 35 41 W |
| Rexfield | Populated Place | 270 | Monroe | 41 04 54 N | 092 57 09 W |
| Rexfield (historical) | Locale | 267 | Monroe | 41 04 54 N | 092 57 31 W |
| Rexfield Post Office (historical) | Post Office | 267 | Monroe | 41 04 54 N | 092 57 31 W |
| Reynolds Airport | Airport | 279 | Linn | 42 11 30 N | 091 40 17 W |
| Reynolds Athletic Field | Park | 311 | Lucas | 41 01 35 N | 093 19 01 W |
| Reynolds Cemetery | Cemetery | 299 | Delaware | 42 33 45 N | 091 32 31 W |
| Reynolds Creek | Stream | | Woodbury | 42 13 03 N | 095 44 35 W |
| Reynolds Elementary School | School | 401 | Clay | 43 08 26 N | 095 08 08 W |
| Reynolds Park | Park | 337 | Webster | 42 31 07 N | 094 10 27 W |
| Reynolds Plot | Cemetery | 360 | Allamakee | 43 16 00 N | 091 19 30 W |
| Rhine Creek | Stream | | Johnson | 41 42 51 N | 091 46 46 W |
| Rhinehart Cemetery | Cemetery | 266 | Jasper | 41 32 04 N | 093 13 45 W |
| Rhodes | Populated Place | 311 | Marshall | 41 55 32 N | 093 11 11 W |
| Rhodes (historical) | Locale | 308 | Marshall | 41 55 25 N | 093 11 03 W |
| Rhodes Cemetery | Cemetery | 313 | Clarke | 41 09 14 N | 093 38 54 W |
| Rhodes Cemetery | Cemetery | 352 | Fremont | 40 54 04 N | 095 42 36 W |
| Rhodes Cemetery | Cemetery | 190 | Van Buren | 40 39 43 N | 091 45 59 W |
| Rhodes Clinic | Hospital | 378 | Calhoun | 42 33 10 N | 094 41 01 W |
| Rhodes Post Office | Post Office | 311 | Marshall | 41 55 32 N | 093 11 11 W |
| Rice Cemetery | Cemetery | 246 | Keokuk | 41 22 46 N | 092 23 22 W |
| Rice Cemetery | Cemetery | 221 | Louisa | 41 07 12 N | 091 16 23 W |
| Rice Lake | Reservoir | 381 | Winnebago | 43 23 02 N | 093 29 28 W |
| Rice Lake | Reservoir | 380 | Winnebago | 43 23 49 N | 093 30 46 W |
| Rice Lake Golf and Country Club | Locale | 384 | Winnebago | 43 23 10 N | 093 30 26 W |
| Rice Lake State Game Management Area | Park | 380 | Worth | 43 23 19 N | 093 29 35 W |
| Rice Lake State Park | Park | 386 | Winnebago | 43 23 00 N | 093 30 08 W |
| Rice School | School | 289 | Polk | 41 37 22 N | 093 40 23 W |
| Riceville | Populated Place | 375 | Howard | 43 21 50 N | 092 33 15 W |
| Riceville (historical) | Populated Place | 381 | Mitchell | 43 23 06 N | 092 33 48 W |
| Riceville City Hall | Building | 375 | Mitchell | 43 21 49 N | 092 33 17 W |
| Riceville Community Center | Building | 375 | Mitchell | 43 21 49 N | 092 33 17 W |
| Riceville Community Rest Home | Hospital | 373 | Mitchell | 43 21 17 N | 092 33 18 W |
| Riceville Community School | School | 375 | Howard | 43 21 17 N | 092 33 11 W |
| Riceville Country Club | Locale | 380 | Howard | 43 22 00 N | 092 32 56 W |
| Riceville Fire Department | Building | 375 | Mitchell | 43 21 49 N | 092 33 17 W |
| Riceville Library | Building | 376 | Mitchell | 43 21 41 N | 092 33 16 W |
| Riceville Post Office | Post Office | 376 | Howard | 43 21 49 N | 092 33 06 W |
| Rich Incorporated Elevator | Locale | 374 | Howard | 43 29 28 N | 092 21 36 W |
| Richard | Populated Place | 361 | Calhoun | 42 25 40 N | 094 31 47 W |
| Richard and Norma Small Life Sports Center | Building | 261 | Linn | 41 55 41 N | 091 25 32 W |
| Richard Scarrem Historical Marker | Park | 237 | Mahaska | 41 09 45 N | 092 37 38 W |
| Richard's Marsh Area | Park | 329 | Hamilton | 42 19 40 N | 093 36 56 W |
| Richards | Locale | 361 | Calhoun | 42 25 40 N | 094 31 47 W |
| Richards House | Building | 278 | Story | 42 01 25 N | 093 38 24 W |
| Richards Post Office (historical) | Post Office | 361 | Calhoun | 42 25 40 N | 094 31 47 W |
| Richardson Branch | Stream | | Boone | 41 54 59 N | 093 51 57 W |
| Richardson Cemetery | Cemetery | 229 | Davis | 40 43 51 N | 092 12 42 W |
| Richardson Cemetery | Cemetery | 324 | Wayne | 40 40 14 N | 093 17 54 W |
| Richardson Chapel | Church | 325 | Wayne | 40 40 13 N | 093 17 54 W |
| Richardson Creek | Stream | | Harrison | 41 39 40 N | 095 41 07 W |
| Richardson Farm Cemetery | Cemetery | 267 | Jackson | 42 03 30 N | 090 32 00 W |
| Richardson School | School | 170 | Lee | 40 37 37 N | 091 21 18 W |
| Richardsville Methodist Cemetery | Cemetery | 294 | Dubuque | 42 35 01 N | 090 52 51 W |
| Richey County Park | Park | 319 | Carroll | 42 05 29 N | 094 37 45 W |
| Richey Creek | Stream | | Johnson | 41 23 55 N | 091 23 43 W |
| Richfield | Populated Place | 358 | Fayette | 42 57 01 N | 092 03 46 W |
| Richfield Cemetery | Cemetery | 361 | Fayette | 42 57 03 N | 092 03 49 W |
| Richfield Post Office (historical) | Post Office | 358 | Fayette | 42 57 01 N | 092 03 46 W |
| Richie Cemetery | Cemetery | 199 | Henry | 41 09 10 N | 091 28 31 W |
| Richland | Populated Place | 235 | Keokuk | 41 11 08 N | 091 59 35 W |
| Richland (historical) | Locale | 235 | Keokuk | 41 11 08 N | 091 59 35 W |
| Richland Cemetery | Cemetery | 338 | Guthrie | 41 50 07 N | 094 21 58 W |
| Richland Cemetery | Cemetery | 444 | Lyon | 43 18 10 N | 096 24 45 W |
| Richland Cemetery | Cemetery | 437 | Sac | 42 21 16 N | 095 13 27 W |
| Richland Cemetery (historical) | Cemetery | 442 | Dickinson | 43 20 60 N | 095 00 11 W |
| Richland City Hall | Building | 236 | Keokuk | 41 11 06 N | 091 59 41 W |
| Richland Creek | Stream | | Tama | 41 54 53 N | 092 25 56 W |
| Richland Creek | Stream | | Washington | 41 13 34 N | 091 54 59 W |
| Richland Fire Department | Building | 235 | Keokuk | 41 11 08 N | 091 59 35 W |
| Richland Lutheran Cemetery | Cemetery | 372 | Cerro Gordo | 42 54 31 N | 093 22 07 W |
| Richland Lutheran Church | Church | 362 | Cerro Gordo | 42 56 48 N | 093 22 56 W |
| Richland Memorial Cemetery | Cemetery | 335 | Guthrie | 41 50 11 N | 094 22 09 W |
| Richland Post Office | Post Office | 236 | Keokuk | 41 11 06 N | 091 59 41 W |
| Richland Public Library | Building | 235 | Keokuk | 41 11 05 N | 091 59 33 W |
| Richland Township Cemetery | Cemetery | 330 | Chickasaw | 42 57 32 N | 092 22 39 W |
| Richland United Methodist Church | Church | 235 | Keokuk | 41 11 00 N | 091 59 40 W |
| Richmond | Populated Place | 230 | Washington | 41 26 59 N | 091 41 51 W |
| Richmond Cemetery | Cemetery | 226 | Washington | 41 26 57 N | 091 41 36 W |
| Richmond Post Office (historical) | Post Office | 230 | Washington | 41 26 59 N | 091 41 51 W |
| Richmond Spring | Spring | 319 | Delaware | 42 38 18 N | 091 33 28 W |
| Richwoods Church | Church | 216 | Henry | 41 01 37 N | 091 36 41 W |
| Rickardsville | Populated Place | 315 | Dubuque | 42 35 00 N | 090 53 02 W |
| Rickardsville Post Office (historical) | Post Office | 315 | Dubuque | 42 35 00 N | 090 53 02 W |
| Ricketts | Populated Place | 398 | Crawford | 42 07 37 N | 095 34 30 W |
| Ricketts (historical) | Locale | 396 | Crawford | 42 07 36 N | 095 34 27 W |
| Ricketts City Hall | Building | 398 | Crawford | 42 07 37 N | 095 34 30 W |
| Ricketts Post Office | Post Office | 398 | Crawford | 42 07 37 N | 095 34 30 W |
| Rickord Post Office (historical) | Post Office | 302 | Hardin | 42 26 48 N | 093 07 47 W |