Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Riverside United Methodist Church | Church | 313 | Webster | 42 29 54 N | 094 11 52 W |
| Riverside United Methodist Church | Church | 337 | Woodbury | 42 30 60 N | 096 28 33 W |
| Riverton | Populated Place | 294 | Fremont | 40 41 13 N | 095 34 07 W |
| Riverton (historical) | Locale | 282 | Fremont | 40 41 36 N | 095 34 06 W |
| Riverton Boat Ramp Access | Locale | 280 | Fremont | 40 41 14 N | 095 34 41 W |
| Riverton Cemetery | Cemetery | 309 | Floyd | 42 59 53 N | 092 35 59 W |
| Riverton Cemetery | Cemetery | 307 | Fremont | 40 40 37 N | 095 34 12 W |
| Riverton Post Office | Post Office | 294 | Fremont | 40 41 13 N | 095 34 07 W |
| Riverton Post Office (historical) | Post Office | 323 | Floyd | 42 59 30 N | 092 37 01 W |
| Riverton Townhall | Building | 320 | Floyd | 42 58 46 N | 092 36 57 W |
| Riverton Wildlife Management Area | Park | 280 | Fremont | 40 42 28 N | 095 34 49 W |
| Rivertown Mall | Locale | 200 | Allamakee | 43 21 43 N | 091 12 57 W |
| Riverview Campground | Locale | 215 | Van Buren | 40 40 05 N | 091 43 26 W |
| Riverview Care Center Nursing Home | Hospital | 262 | Polk | 41 36 14 N | 093 36 32 W |
| Riverview Church | Church | 198 | Scott | 41 31 47 N | 090 30 26 W |
| Riverview Elementary School | School | 337 | Woodbury | 42 30 60 N | 096 28 46 W |
| Riverview Honor Farm | Locale | 239 | Jasper | 41 37 14 N | 093 03 49 W |
| Riverview Park | Park | 180 | Dubuque | 42 31 15 N | 090 38 30 W |
| Riverview Park | Park | 169 | Lee | 40 23 30 N | 091 22 58 W |
| Riverview Park | Park | 159 | Lee | 40 32 01 N | 091 24 53 W |
| Riverview Park | Park | 160 | Lee | 40 37 44 N | 091 18 32 W |
| Riverview Park | Park | 263 | Marshall | 42 03 60 N | 092 54 10 W |
| Riverview Park | Park | 363 | Plymouth | 42 47 47 N | 096 11 06 W |
| Riverview Park | Park | 246 | Polk | 41 37 24 N | 093 37 47 W |
| Riverview Park | Park | 222 | Scott | 41 35 33 N | 090 36 05 W |
| Riverview Post Office (historical) | Post Office | 449 | Lyon | 43 25 40 N | 095 53 59 W |
| Riverview Recreation Area | Park | 253 | Black Hawk | 42 28 35 N | 092 18 46 W |
| Riverview Recreation Field | Park | 313 | Hamilton | 42 28 35 N | 093 49 16 W |
| Riverview School | School | 322 | Dubuque | 42 23 43 N | 090 32 40 W |
| Riverview School | School | 321 | Hamilton | 42 28 30 N | 093 49 20 W |
| Riverview Terrace Park | Park | 217 | Scott | 41 31 48 N | 090 35 42 W |
| Riverview Wildlife Area | Park | 373 | Palo Alto | 43 12 50 N | 094 44 41 W |
| Riverwalk Park | Park | 161 | Des Moines | 40 49 00 N | 091 05 57 W |
| Rizors Post Office (historical) | Post Office | 271 | Marion | 41 17 03 N | 093 00 19 W |
| Roach | Locale | 387 | Shelby | 41 41 25 N | 095 28 46 W |
| Roach Post Office (historical) | Post Office | 367 | Shelby | 41 40 30 N | 095 29 56 W |
| Roadman Hall | Building | 376 | Woodbury | 42 28 31 N | 096 21 41 W |
| Roadman Memorial Park | Park | 290 | Grundy | 42 28 15 N | 092 39 53 W |
| Roads End Prairie Wildlife Area | Park | 372 | Palo Alto | 43 09 20 N | 094 42 47 W |
| Roadside Park | Park | 334 | Hardin | 42 31 07 N | 093 17 36 W |
| Roadside Rest Area | Locale | 326 | Harrison | 41 34 30 N | 095 51 06 W |
| Robb Cemetery | Cemetery | 215 | Van Buren | 40 41 50 N | 091 52 06 W |
| Robbins Cemetery | Cemetery | 383 | Mitchell | 43 24 54 N | 092 40 20 W |
| Robbins Chapel Cemetery | Cemetery | 305 | Dallas | 41 48 50 N | 093 51 51 W |
| Robbins Lake | Lake | 216 | Linn | 42 00 25 N | 091 42 07 W |
| Robbins Lake | Lake | 247 | Linn | 42 00 33 N | 091 32 16 W |
| Robel Field | Airport | 305 | Dallas | 41 39 27 N | 093 49 16 W |
| Robert and Ruth Kehl Center | Building | 250 | Dubuque | 42 30 36 N | 090 41 30 W |
| Robert Deal Elementary School | School | 369 | Carroll | 41 52 29 N | 094 40 27 W |
| Robert Emmet Statue | Park | 381 | Palo Alto | 43 06 39 N | 094 40 38 W |
| Robert Lucas School | School | 233 | Johnson | 41 39 03 N | 091 29 32 W |
| Robert M Lincoln Center | Building | 383 | Woodbury | 42 28 30 N | 096 21 32 W |
| Robert Mulroney Recreation Wildlife Area | Park | 356 | Palo Alto | 43 01 02 N | 094 34 31 W |
| Roberton's Woods Athlitic Fields | Park | 315 | Fayette | 42 50 25 N | 091 47 56 W |
| Roberts | Populated Place | 341 | Webster | 42 25 37 N | 094 10 28 W |
| Roberts Cemetery | Cemetery | 336 | Adair | 41 20 22 N | 094 15 22 W |
| Roberts Cemetery | Cemetery | 247 | Mahaska | 41 22 46 N | 092 31 26 W |
| Roberts Chapel Cemetery | Cemetery | 232 | Washington | 41 21 42 N | 091 47 23 W |
| Roberts Creek | Reservoir | 225 | Marion | 41 25 12 N | 093 02 49 W |
| Roberts Creek | Stream | | Clayton | 42 50 13 N | 091 22 29 W |
| Roberts Creek Park | Park | 244 | Marion | 41 26 40 N | 093 03 21 W |
| Roberts Creek State Preserve | Park | 263 | Clayton | 42 54 50 N | 091 22 40 W |
| Roberts Hall | Building | 283 | Story | 42 01 25 N | 093 38 31 W |
| Roberts Park | Park | 362 | Allamakee | 43 05 13 N | 091 34 12 W |
| Roberts Park | Park | 302 | Pottawattamie | 41 16 17 N | 095 52 58 W |
| Roberts Stadium | Park | 357 | Woodbury | 42 28 35 N | 096 22 06 W |
| Robertson | Populated Place | 358 | Hardin | 42 30 23 N | 093 07 39 W |
| Robertson (historical) | Locale | 358 | Hardin | 42 30 23 N | 093 07 39 W |
| Robertson Access | Locale | 232 | Mahaska | 41 30 30 N | 092 38 56 W |
| Robertson Post Office (historical) | Post Office | 358 | Hardin | 42 30 23 N | 093 07 39 W |
| Robey Memorial Library | Building | 382 | Allamakee | 43 16 13 N | 091 28 52 W |
| Robin | Locale | 266 | Benton | 41 57 50 N | 091 53 15 W |
| Robin Avenue Bridge | Bridge | 364 | Carroll | 42 05 50 N | 094 45 51 W |
| Robin Post Office (historical) | Post Office | 268 | Benton | 41 57 56 N | 091 51 59 W |
| Robins | Populated Place | 259 | Linn | 42 04 16 N | 091 40 01 W |
| Robins Cemetery | Cemetery | 268 | Linn | 42 03 47 N | 091 39 28 W |
| Robins Church of the Brethren | Church | 259 | Linn | 42 04 11 N | 091 40 02 W |
| Robins Fire Department | Building | 259 | Linn | 42 04 13 N | 091 40 02 W |
| Robins Park | Park | 256 | Linn | 42 03 60 N | 091 40 01 W |
| Robins Police Dapartment | Building | 259 | Linn | 42 04 13 N | 091 40 02 W |
| Robins Post Office | Post Office | 259 | Linn | 42 04 16 N | 091 40 01 W |
| Robins Town Hall | Building | 259 | Linn | 42 04 13 N | 091 40 02 W |
| Robinson | Populated Place | 284 | Delaware | 42 20 31 N | 091 34 44 W |
| Robinson Airport | Airport | 306 | Harrison | 41 31 55 N | 095 56 31 W |
| Robinson Bird Sanctuary | Park | 262 | Black Hawk | 42 27 20 N | 092 25 08 W |
| Robinson Cemetery | Cemetery | 191 | Henry | 40 58 50 N | 091 35 41 W |
| Robinson County Park | Park | 334 | Franklin | 42 46 41 N | 093 11 27 W |
| Robinson Crusoe Island | Island | 256 | Black Hawk | 42 30 28 N | 092 21 14 W |
| Robinson Park | Park | 460 | Osceola | 43 23 55 N | 095 44 13 W |
| Robinson Post Office (historical) | Post Office | 284 | Delaware | 42 20 31 N | 091 34 44 W |
| Robinson Wildlife Area | Park | 332 | Hardin | 42 25 33 N | 093 20 18 W |
| Robison-Whitaker Acres | Populated Place | 273 | Story | 41 55 33 N | 093 26 07 W |
| Roby Cemetery | Cemetery | 368 | Calhoun | 42 22 50 N | 094 37 01 W |
| Rochester | Populated Place | 203 | Cedar | 41 40 26 N | 091 09 31 W |
| Rochester Cemetery | Cemetery | 217 | Mahaska | 41 16 08 N | 092 47 26 W |
| Rochester Park | Park | 197 | Cedar | 41 40 00 N | 091 09 23 W |
| Rochester Post Office (historical) | Post Office | 203 | Cedar | 41 40 26 N | 091 09 31 W |
| Rock Bluff Park | Park | 197 | Wapello | 41 03 00 N | 092 28 36 W |
| Rock Bowl Stadium | Park | 242 | Dubuque | 42 30 19 N | 090 40 48 W |
| Rock Branch | Locale | 436 | Woodbury | 42 28 30 N | 095 55 05 W |
| Rock Branch Church | Church | 440 | Woodbury | 42 28 13 N | 095 55 16 W |
| Rock Cemetery | Cemetery | 434 | Woodbury | 42 24 48 N | 095 43 45 W |
| Rock Creek | Populated Place | 343 | Mitchell | 43 14 06 N | 092 55 08 W |
| Rock Creek | Stream | | Benton | 42 18 40 N | 092 08 04 W |
| Rock Creek | Stream | | Cedar | 41 40 36 N | 091 10 11 W |
| Rock Creek | Stream | | Cerro Gordo | 43 02 11 N | 093 00 34 W |
| Rock Creek | Stream | | Cherokee | 42 37 13 N | 095 40 30 W |
| Rock Creek | Stream | | Clinton | 41 46 14 N | 090 17 33 W |
| Rock Creek | Stream | | Clinton | 41 46 47 N | 090 48 11 W |
| Rock Creek | Stream | | Clinton | 41 50 46 N | 090 34 38 W |