Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Rock Creek | Stream | | Henry | 40 51 54 N | 091 42 28 W |
| Rock Creek | Stream | | Jackson | 42 04 52 N | 090 27 23 W |
| Rock Creek | Stream | | Jasper | 41 40 42 N | 092 50 52 W |
| Rock Creek | Stream | | Jefferson | 40 54 10 N | 091 47 11 W |
| Rock Creek | Stream | | Jefferson | 40 59 51 N | 092 06 34 W |
| Rock Creek | Stream | | Keokuk | 41 18 42 N | 092 14 18 W |
| Rock Creek | Stream | | Keokuk | 41 14 18 N | 092 06 15 W |
| Rock Creek | Stream | | Marshall | 42 02 44 N | 092 50 08 W |
| Rock Creek | Stream | | Mitchell | 43 12 43 N | 092 48 26 W |
| Rock Creek | Stream | | Monona | 42 02 36 N | 095 42 24 W |
| Rock Creek | Stream | | Plymouth | 42 39 19 N | 096 32 15 W |
| Rock Creek | Stream | | Polk | 41 41 56 N | 093 40 27 W |
| Rock Creek | Stream | | Poweshiek | 41 43 48 N | 092 20 54 W |
| Rock Creek | Stream | | Story | 41 52 40 N | 093 23 51 W |
| Rock Creek | Stream | | Tama | 42 14 28 N | 092 26 34 W |
| Rock Creek | Stream | | Van Buren | 40 45 53 N | 091 53 50 W |
| Rock Creek | Stream | | Wapello | 41 02 29 N | 092 27 39 W |
| Rock Creek | Stream | | Woodbury | 42 25 07 N | 095 50 46 W |
| Rock Creek Cemetery | Cemetery | 294 | Jasper | 41 44 18 N | 092 49 25 W |
| Rock Creek Cemetery | Cemetery | 318 | Tama | 42 04 46 N | 092 43 43 W |
| Rock Creek Church and Cemetery | Cemetery | 235 | Keokuk | 41 11 17 N | 092 08 23 W |
| Rock Creek County Park | Park | 175 | Clinton | 41 45 02 N | 090 19 10 W |
| Rock Creek Evangelical Lutheran Cemetery | Cemetery | 346 | Mitchell | 43 14 07 N | 092 55 22 W |
| Rock Creek Lake | Reservoir | 266 | Jasper | 41 44 13 N | 092 51 07 W |
| Rock Creek Lake Dam | Dam | 258 | Jasper | 41 44 12 N | 092 51 09 W |
| Rock Creek Lutheran Church | Church | 347 | Mitchell | 43 14 15 N | 092 55 12 W |
| Rock Creek Marina and Campground | Locale | 176 | Clinton | 41 45 05 N | 090 19 25 W |
| Rock Creek Number Seven School (historical) | School | 268 | Jasper | 41 43 00 N | 092 54 16 W |
| Rock Creek Post Office (historical) | Post Office | 357 | Mitchell | 43 17 53 N | 092 57 32 W |
| Rock Creek State Park | Park | 281 | Jasper | 41 45 12 N | 092 50 14 W |
| Rock Falls | Locale | 338 | Cerro Gordo | 43 12 20 N | 093 05 21 W |
| Rock Falls | Populated Place | 336 | Cerro Gordo | 43 12 27 N | 093 05 05 W |
| Rock Falls Bridge | Bridge | 328 | Cerro Gordo | 43 12 24 N | 093 05 03 W |
| Rock Falls Cemetery | Cemetery | 342 | Cerro Gordo | 43 12 44 N | 093 05 10 W |
| Rock Falls Community Center | Building | 336 | Cerro Gordo | 43 12 27 N | 093 05 05 W |
| Rock Falls Creek | Stream | | Cerro Gordo | 43 12 55 N | 093 05 30 W |
| Rock Falls Grain Company Elevator | Locale | 336 | Cerro Gordo | 43 12 27 N | 093 05 05 W |
| Rock Falls Post Office (historical) | Post Office | 336 | Cerro Gordo | 43 12 27 N | 093 05 05 W |
| Rock Forest School (historical) | School | 381 | Clay | 42 55 05 N | 095 20 38 W |
| Rock Grove City | Locale | 341 | Floyd | 43 07 40 N | 092 59 01 W |
| Rock Grove City Post Office (historical) | Post Office | 338 | Floyd | 43 07 33 N | 092 59 03 W |
| Rock Grove Township Cemetery | Cemetery | 332 | Floyd | 43 07 22 N | 092 59 18 W |
| Rock Hollow | Valley | | Clayton | 42 42 14 N | 091 14 05 W |
| Rock Island Botanical State Preserve | Park | 261 | Linn | 42 01 21 N | 091 44 05 W |
| Rock Island Depot | Building | 205 | Muscatine | 41 34 18 N | 091 16 03 W |
| Rock Island Depot | Building | 357 | Wright | 42 43 46 N | 093 43 60 W |
| Rock Island Old Stone Arch Trail | Trail | 396 | Shelby | 41 31 07 N | 095 26 59 W |
| Rock Island Passenger Railroad Station | Building | 254 | Mahaska | 41 17 20 N | 092 38 31 W |
| Rock Island Railroad Depot | Building | 244 | Polk | 41 35 02 N | 093 37 16 W |
| Rock of Ages Chapel | Church | 255 | Dubuque | 42 29 07 N | 090 41 28 W |
| Rock Post Office (historical) | Post Office | 351 | Cerro Gordo | 43 15 12 N | 093 21 41 W |
| Rock Post Office (historical) | Post Office | 374 | Hancock | 43 14 18 N | 093 21 01 W |
| Rock Prairie Cemetery | Cemetery | 309 | Delaware | 42 30 22 N | 091 24 07 W |
| Rock Rapids | Populated Place | 423 | Lyon | 43 25 38 N | 096 10 33 W |
| Rock Rapids (historical) | Locale | 409 | Lyon | 43 26 03 N | 096 10 29 W |
| Rock Rapids Country Club | Locale | 412 | Lyon | 43 27 25 N | 096 10 36 W |
| Rock Rapids Municipal Airport | Airport | 413 | Lyon | 43 27 08 N | 096 10 47 W |
| Rock Rapids Police Department | Building | 410 | Lyon | 43 25 54 N | 096 10 08 W |
| Rock Rapids Post Office | Post Office | 411 | Lyon | 43 25 52 N | 096 10 03 W |
| Rock Rapids Public Library | Building | 411 | Lyon | 43 25 54 N | 096 10 14 W |
| Rock Rapids Trail | Trail | 409 | Lyon | 43 26 00 N | 096 10 01 W |
| Rock River | Stream | | Sioux | 43 04 58 N | 096 27 16 W |
| Rock River Access | Locale | 376 | Sioux | 43 13 10 N | 096 17 26 W |
| Rock Run Creek | Stream | | Cedar | 41 42 24 N | 091 11 33 W |
| Rock Run Elementary School | School | 343 | Hardin | 42 31 46 N | 093 15 58 W |
| Rock Run Post Office (historical) | Post Office | 361 | Shelby | 41 36 50 N | 095 31 29 W |
| Rock Sioux Access | Locale | 356 | Sioux | 43 04 60 N | 096 27 06 W |
| Rock Spring Cemetery | Cemetery | 188 | Des Moines | 40 45 05 N | 091 11 36 W |
| Rock Spring School (historical) | School | 228 | Scott | 41 41 54 N | 090 29 28 W |
| Rock Township Cemetery | Cemetery | 420 | Cherokee | 42 42 00 N | 095 39 01 W |
| Rock Valley | Populated Place | 381 | Sioux | 43 12 19 N | 096 17 42 W |
| Rock Valley (historical) | Locale | 381 | Sioux | 43 12 10 N | 096 17 51 W |
| Rock Valley Cemetery | Cemetery | 278 | Marshall | 42 00 28 N | 092 50 44 W |
| Rock Valley Cemetery | Cemetery | 314 | Tama | 42 03 11 N | 092 41 54 W |
| Rock Valley Christian School | School | 379 | Sioux | 43 12 28 N | 096 17 48 W |
| Rock Valley Elementary School | School | 382 | Sioux | 43 12 21 N | 096 17 21 W |
| Rock Valley Elevator Company Elevator | Locale | 383 | Sioux | 43 12 06 N | 096 17 41 W |
| Rock Valley Golf Club | Locale | 394 | Sioux | 43 11 38 N | 096 18 16 W |
| Rock Valley High School | School | 381 | Sioux | 43 12 30 N | 096 17 17 W |
| Rock Valley Police Department | Building | 382 | Sioux | 43 12 13 N | 096 17 40 W |
| Rock Valley Post Office | Post Office | 380 | Sioux | 43 12 20 N | 096 17 43 W |
| Rock Valley Public Library | Building | 380 | Sioux | 43 12 22 N | 096 17 43 W |
| Rock Vision Clinic | Hospital | 376 | Calhoun | 42 16 01 N | 094 43 11 W |
| Rock Vision Clinic | Hospital | 383 | Sac | 42 18 24 N | 095 03 12 W |
| Rock Vision Clinic | Hospital | 348 | Webster | 42 16 50 N | 094 17 27 W |
| Rock Wildlife Area | Park | 374 | Sioux | 43 12 10 N | 096 19 51 W |
| Rockaway (historical) | Locale | 188 | Jackson | 42 06 11 N | 090 24 44 W |
| Rockaway (historical) | Populated Place | 188 | Jackson | 42 06 11 N | 090 24 44 W |
| Rockbranch Post Office (historical) | Post Office | 436 | Woodbury | 42 28 30 N | 095 55 05 W |
| Rockdale | Locale | 214 | Dubuque | 42 27 51 N | 090 40 42 W |
| Rockdale | Populated Place | 214 | Dubuque | 42 27 51 N | 090 40 42 W |
| Rockdale Church | Church | 200 | Dubuque | 42 28 12 N | 090 40 49 W |
| Rockdale Methodist Cemetery | Cemetery | 199 | Dubuque | 42 28 13 N | 090 40 49 W |
| Rockdale Post Office (historical) | Post Office | 214 | Dubuque | 42 27 51 N | 090 40 42 W |
| Rockford | Locale | 314 | Floyd | 43 03 15 N | 092 57 31 W |
| Rockford | Populated Place | 307 | Floyd | 43 03 08 N | 092 56 55 W |
| Rockford Baptist Church | Church | 311 | Floyd | 43 00 35 N | 092 57 51 W |
| Rockford City Hall | Building | 307 | Floyd | 43 03 09 N | 092 56 57 W |
| Rockford Fossil and Praire Park | Park | 312 | Floyd | 43 02 55 N | 092 58 16 W |
| Rockford Golf and Country Club | Locale | 309 | Floyd | 43 02 50 N | 092 57 51 W |
| Rockford Medical Clinic | Hospital | 305 | Floyd | 43 03 09 N | 092 56 41 W |
| Rockford Park | Park | 311 | Floyd | 43 03 11 N | 092 57 20 W |
| Rockford Police Department | Building | 307 | Floyd | 43 03 10 N | 092 56 54 W |
| Rockford Post Office | Post Office | 306 | Floyd | 43 03 09 N | 092 56 51 W |
| Rockford Public Library | Building | 307 | Floyd | 43 03 09 N | 092 56 56 W |
| Rockingham (historical) | Populated Place | 167 | Scott | 41 28 57 N | 090 38 00 W |
| Rockingham Post Office (historical) | Post Office | 167 | Scott | 41 28 57 N | 090 38 00 W |
| Rocklyn Mobile Home | Populated Place | 286 | Polk | 41 36 57 N | 093 42 33 W |
| Rockpower Church | Church | 261 | Polk | 41 33 22 N | 093 39 26 W |
| Rockton | Populated Place | 262 | Marshall | 42 03 11 N | 092 50 14 W |