Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Rockton (historical) | Locale | 269 | Marshall | 42 04 05 N | 092 50 26 W |
| Rockton Post Office (historical) | Post Office | 269 | Marshall | 42 04 05 N | 092 50 26 W |
| Rockville | Populated Place | 282 | Delaware | 42 25 07 N | 091 08 32 W |
| Rockville Cemetery | Cemetery | 297 | Delaware | 42 25 05 N | 091 08 41 W |
| Rockville Post Office (historical) | Post Office | 282 | Delaware | 42 25 07 N | 091 08 32 W |
| Rockwell | Populated Place | 340 | Cerro Gordo | 42 59 07 N | 093 11 31 W |
| Rockwell (historical) | Locale | 344 | Cerro Gordo | 42 59 07 N | 093 11 14 W |
| Rockwell City | Locale | 371 | Calhoun | 42 23 30 N | 094 37 56 W |
| Rockwell City | Populated Place | 375 | Calhoun | 42 23 43 N | 094 38 02 W |
| Rockwell City Bridge | Bridge | 361 | Calhoun | 42 24 00 N | 094 36 26 W |
| Rockwell City Elementary School | School | 370 | Calhoun | 42 23 47 N | 094 37 29 W |
| Rockwell City Fire Department | Building | 375 | Calhoun | 42 23 47 N | 094 38 01 W |
| Rockwell City Hall | Building | 375 | Calhoun | 42 23 43 N | 094 37 59 W |
| Rockwell City Hall | Building | 341 | Cerro Gordo | 42 59 08 N | 093 11 23 W |
| Rockwell City High School | School | 372 | Calhoun | 42 23 33 N | 094 38 43 W |
| Rockwell City Library | Building | 375 | Calhoun | 42 23 42 N | 094 38 07 W |
| Rockwell City Municipal Airport | Airport | 370 | Calhoun | 42 23 32 N | 094 37 16 W |
| Rockwell City Park | Park | 372 | Calhoun | 42 23 58 N | 094 38 06 W |
| Rockwell City United Methodist Church | Church | 370 | Calhoun | 42 23 47 N | 094 37 34 W |
| Rockwell Community Nursing Home | Hospital | 347 | Cerro Gordo | 42 59 15 N | 093 10 58 W |
| Rockwell Dental Clinic | Hospital | 342 | Cerro Gordo | 42 59 06 N | 093 11 23 W |
| Rockwell Fire Department | Building | 344 | Cerro Gordo | 42 59 08 N | 093 11 15 W |
| Rockwell Police Department | Building | 345 | Cerro Gordo | 42 59 08 N | 093 10 31 W |
| Rockwell Post Office | Post Office | 375 | Calhoun | 42 23 47 N | 094 38 01 W |
| Rockwell Post Office | Post Office | 342 | Cerro Gordo | 42 59 06 N | 093 11 20 W |
| Rockwell Public Library | Building | 342 | Cerro Gordo | 42 59 06 N | 093 11 21 W |
| Rockwell-Swaledale Community School | School | 340 | Cerro Gordo | 42 59 01 N | 093 11 28 W |
| Rocky Branch | Stream | | Jefferson | 41 04 13 N | 091 45 57 W |
| Rocky Branch | Stream | | Madison | 41 16 32 N | 094 10 05 W |
| Rocky Branch | Stream | | Page | 40 49 18 N | 095 20 04 W |
| Rocky Ford | Locale | 302 | Decatur | 40 51 14 N | 093 59 42 W |
| Rocky Run | Stream | | Crawford | 42 01 34 N | 095 16 33 W |
| Rocky Run Cemetery | Cemetery | 222 | Keokuk | 41 12 20 N | 091 56 51 W |
| Rod Library | Building | 288 | Black Hawk | 42 30 54 N | 092 27 36 W |
| Rodabough Cemetery | Cemetery | 310 | Madison | 41 26 20 N | 094 01 01 W |
| Rode (historical) | Locale | 307 | Harrison | 41 32 40 N | 095 51 36 W |
| Rode Post Office (historical) | Post Office | 307 | Harrison | 41 32 40 N | 095 51 36 W |
| Rodeo Park | Park | 195 | Lee | 40 39 06 N | 091 19 17 W |
| Rodford Bridge | Bridge | 198 | Dubuque | 42 32 39 N | 090 46 38 W |
| Rodman | Locale | 365 | Palo Alto | 43 01 40 N | 094 31 32 W |
| Rodman | Populated Place | 363 | Palo Alto | 43 01 43 N | 094 31 52 W |
| Rodman City Hall | Building | 363 | Palo Alto | 43 01 43 N | 094 31 52 W |
| Rodman Elevator | Locale | 363 | Palo Alto | 43 01 43 N | 094 31 52 W |
| Rodman Fire Department | Building | 363 | Palo Alto | 43 01 43 N | 094 31 52 W |
| Rodman Post Office | Post Office | 363 | Palo Alto | 43 01 43 N | 094 31 52 W |
| Rodney | Populated Place | 338 | Monona | 42 12 20 N | 095 57 09 W |
| Rodney (historical) | Locale | 331 | Monona | 42 12 15 N | 095 56 56 W |
| Rodney City Hall | Building | 338 | Monona | 42 12 20 N | 095 57 09 W |
| Rodney Pits Recreation Area | Park | 323 | Monona | 42 12 00 N | 095 56 36 W |
| Rodney Post Office | Post Office | 338 | Monona | 42 12 20 N | 095 57 09 W |
| Roe Cemetery | Cemetery | 319 | Delaware | 42 33 60 N | 091 24 01 W |
| Roelf-Johnson Wildlife Management Area | Park | 457 | Osceola | 43 22 25 N | 095 43 16 W |
| Roelyn | Locale | 354 | Webster | 42 24 49 N | 094 21 27 W |
| Roelyn | Populated Place | 354 | Webster | 42 24 49 N | 094 21 27 W |
| Roelyn Post Office (historical) | Post Office | 354 | Webster | 42 24 49 N | 094 21 27 W |
| Roeman-Stetrichs Wildlife Area | Park | 421 | Lyon | 43 28 16 N | 096 29 43 W |
| Roese Plot | Cemetery | 349 | Allamakee | 43 19 60 N | 091 21 30 W |
| Roetzel Creek | Stream | | O'Brien | 43 04 12 N | 095 50 18 W |
| Roff Creek | Stream | | Louisa | 41 09 09 N | 091 15 46 W |
| Roger Birdsall Memorial Park | Park | 299 | Black Hawk | 42 31 50 N | 092 29 06 W |
| Rogers | Locale | 281 | Linn | 42 11 48 N | 091 34 44 W |
| Rogers | Populated Place | 281 | Linn | 42 11 48 N | 091 34 44 W |
| Rogers Cemetery | Cemetery | 198 | Muscatine | 41 27 38 N | 091 16 39 W |
| Rogers Cemetery | Cemetery | 217 | Van Buren | 40 47 30 N | 091 53 21 W |
| Rogers Creek | Stream | | Winneshiek | 43 08 44 N | 091 55 38 W |
| Rogers Ditch | Canal | 158 | Lee | 40 41 10 N | 091 12 29 W |
| Rogers Grove Cemetery | Cemetery | 276 | Linn | 41 53 57 N | 091 32 59 W |
| Rogers Park | Park | 318 | Dallas | 41 45 28 N | 094 01 46 W |
| Rogers Post Office (historical) | Post Office | 281 | Linn | 42 11 48 N | 091 34 44 W |
| Rogers School | School | 284 | Marshall | 42 03 09 N | 092 55 13 W |
| Rogersville | Populated Place | 289 | Benton | 42 06 31 N | 092 13 54 W |
| Rogerville Post Office (historical) | Post Office | 283 | Benton | 42 06 35 N | 092 14 26 W |
| Rogg Creek | Stream | | Sioux | 43 12 55 N | 096 16 56 W |
| Rohades Acres | Park | 278 | Boone | 42 12 15 N | 093 59 01 W |
| Rohlf Medical Clinic | Hospital | 287 | Bremer | 42 43 23 N | 092 29 01 W |
| Rohlman Hall | Building | 243 | Dubuque | 42 30 22 N | 090 40 54 W |
| Rohlman Hall | Building | 213 | Scott | 41 32 23 N | 090 34 48 W |
| Roland | Populated Place | 312 | Story | 42 09 59 N | 093 30 07 W |
| Roland (historical) | Locale | 315 | Story | 42 10 10 N | 093 29 59 W |
| Roland Cemetery | Cemetery | 259 | Davis | 40 50 00 N | 092 26 31 W |
| Roland Cemetery | Cemetery | 314 | Story | 42 09 57 N | 093 31 02 W |
| Roland City Hall | Building | 315 | Story | 42 10 06 N | 093 29 60 W |
| Roland Post Office | Post Office | 315 | Story | 42 10 07 N | 093 30 03 W |
| Roland Post Office (historical) | Post Office | 309 | Story | 42 09 58 N | 093 31 55 W |
| Roland Public Library | Building | 315 | Story | 42 10 05 N | 093 30 02 W |
| Roland-Story Elementary School | School | 302 | Story | 42 11 29 N | 093 35 17 W |
| Roland-Story High School | School | 302 | Story | 42 11 18 N | 093 35 20 W |
| Roland-Story Middle School | School | 315 | Story | 42 09 52 N | 093 30 00 W |
| Rolfe | Locale | 360 | Pocahontas | 42 48 33 N | 094 31 36 W |
| Rolfe | Populated Place | 361 | Pocahontas | 42 48 46 N | 094 31 37 W |
| Rolfe (historical) | Populated Place | 364 | Pocahontas | 42 50 15 N | 094 28 38 W |
| Rolfe Care Center | Hospital | 363 | Pocahontas | 42 48 48 N | 094 32 08 W |
| Rolfe City Town Hall | Building | 363 | Pocahontas | 42 48 49 N | 094 31 41 W |
| Rolfe Golf Club | Locale | 361 | Pocahontas | 42 48 24 N | 094 31 41 W |
| Rolfe Medical Surgical Clinic | Hospital | 363 | Pocahontas | 42 48 48 N | 094 31 41 W |
| Rolfe Post Office | Post Office | 362 | Pocahontas | 42 48 43 N | 094 31 41 W |
| Rolfe Public Library | Building | 361 | Pocahontas | 42 48 51 N | 094 31 39 W |
| Rolling Acres Christian Reformed Church | Church | 354 | Cerro Gordo | 43 07 59 N | 093 12 31 W |
| Rolling Acres Family Campground | Locale | 288 | Jasper | 41 41 05 N | 093 00 21 W |
| Rolling Acres Golf Course | Locale | 244 | Linn | 42 12 32 N | 091 48 21 W |
| Rolling Acres Potholes | Park | 375 | Wright | 42 50 15 N | 093 40 26 W |
| Rolling Cove Park | Park | 293 | Appanoose | 40 50 55 N | 092 58 51 W |
| Rolling Green Elementary School | School | 289 | Polk | 41 37 56 N | 093 43 47 W |
| Rolling Hills Country Club | Locale | 420 | Sioux | 43 12 30 N | 096 08 21 W |
| Rolling Hills Dental Clinic | Hospital | 342 | Webster | 42 31 57 N | 094 10 39 W |
| Rolling Hills Golf Course | Locale | 267 | Warren | 41 26 05 N | 093 41 21 W |
| Rolling Hills Mobile Home Park | Populated Place | 292 | Story | 41 54 48 N | 093 23 51 W |
| Rolling Hills Park | Park | 375 | Carroll | 42 03 21 N | 094 52 11 W |
| Rolling Knolls Golf Course | Locale | 303 | Dubuque | 42 28 35 N | 091 05 50 W |
| Rolling Thunder Prairie | Park | 285 | Warren | 41 12 20 N | 093 39 26 W |