Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Rocky Branch | Stream | | Jefferson | 38 14 02 N | 088 41 32 W |
| Rocky Branch | Stream | | Madison | 38 54 35 N | 090 04 50 W |
| Rocky Branch | Stream | | Marion | 38 44 00 N | 088 45 47 W |
| Rocky Branch | Stream | | Massac | 37 10 46 N | 088 47 10 W |
| Rocky Branch | Stream | | Menard | 39 58 36 N | 089 50 12 W |
| Rocky Branch | Stream | | Monroe | 38 15 00 N | 090 02 23 W |
| Rocky Branch | Stream | | Pope | 37 23 07 N | 088 32 21 W |
| Rocky Branch | Stream | | Randolph | 38 03 14 N | 089 53 45 W |
| Rocky Branch | Stream | | Saline | 37 42 27 N | 088 23 47 W |
| Rocky Branch | Stream | | Saline | 37 36 22 N | 088 34 48 W |
| Rocky Branch | Stream | | Shelby | 39 22 14 N | 088 52 46 W |
| Rocky Branch Hollow | Valley | | Saline | 37 37 39 N | 088 23 54 W |
| Rocky Branch Nature Preserve | Park | 196 | Clark | 39 27 57 N | 087 45 57 W |
| Rocky Branch School | School | 115 | Saline | 37 43 53 N | 088 24 37 W |
| Rocky Branch School (historical) | School | 186 | Shelby | 39 21 48 N | 088 53 59 W |
| Rocky Ford | Crossing | 171 | Cumberland | 39 18 41 N | 088 10 20 W |
| Rocky Ford Bridge | Bridge | 162 | Logan | 40 07 19 N | 089 27 48 W |
| Rocky Ford Bridge | Bridge | 186 | Tazewell | 40 35 12 N | 089 16 42 W |
| Rocky Ford Lakes | Reservoir | 177 | Montgomery | 39 04 33 N | 089 22 29 W |
| Rocky Ford Pond | Reservoir | 125 | Clinton | 38 35 12 N | 089 38 42 W |
| Rocky Ford Pond Dam | Dam | 125 | Clinton | 38 35 12 N | 089 38 42 W |
| Rocky Ford Sportsman Club North Lake | Reservoir | 188 | Montgomery | 39 04 42 N | 089 22 36 W |
| Rocky Ford Sportsman Club North Lake Dam | Dam | 188 | Montgomery | 39 04 42 N | 089 22 36 W |
| Rocky Ford Sportsman Club South Lake | Reservoir | 187 | Montgomery | 39 04 30 N | 088 22 30 W |
| Rocky Ford Sportsman Club South Lake Dam | Dam | 187 | Montgomery | 39 04 30 N | 088 22 30 W |
| Rocky Fork | Stream | | Jackson | 37 57 51 N | 089 27 23 W |
| Rocky Fork | Stream | | Madison | 38 57 39 N | 090 15 53 W |
| Rocky Fork Church | Church | 179 | Madison | 38 56 33 N | 090 14 01 W |
| Rocky Glen Park | Park | 183 | Peoria | 40 41 25 N | 089 39 35 W |
| Rocky Hill | Summit | 238 | Calhoun | 39 09 09 N | 090 38 34 W |
| Rocky Hill School (historical) | School | 207 | Adams | 40 05 13 N | 091 14 36 W |
| Rocky Hollow | Valley | | Clark | 39 15 45 N | 087 45 16 W |
| Rocky Hollow | Valley | | Jackson | 37 40 00 N | 089 21 12 W |
| Rocky Ledge Park | Park | 180 | Cook | 41 45 11 N | 087 32 42 W |
| Rocky Point Beach | Beach | 157 | Marion | 38 42 54 N | 088 45 08 W |
| Rocky Point Picnic Area | Locale | 135 | Hamilton | 38 03 40 N | 088 24 15 W |
| Rocky Run | Stream | | Bureau | 41 17 48 N | 089 30 10 W |
| Rocky Run | Stream | | Hancock | 40 16 07 N | 091 25 15 W |
| Rocky Run Lake | Reservoir | 172 | Hancock | 40 16 06 N | 091 25 01 W |
| Rocky Run Lake Dam | Dam | 172 | Hancock | 40 16 06 N | 091 25 01 W |
| Rocky Run School (historical) | School | 179 | Hancock | 40 15 56 N | 091 24 35 W |
| Rocky Spring Access Area | Park | 191 | Shelby | 39 18 07 N | 088 42 27 W |
| Rocvalle Childrens Home | Building | 233 | Winnebago | 42 19 25 N | 089 05 53 W |
| Rodden | Populated Place | 208 | Jo Daviess | 42 19 41 N | 090 19 13 W |
| Rodemich | Populated Place | 203 | St. Clair | 38 26 27 N | 090 08 16 W |
| Rodgers Cemetery | Cemetery | 159 | Clay | 38 50 47 N | 088 36 46 W |
| Rodgers School (historical) | School | 123 | Franklin | 37 56 35 N | 089 01 26 W |
| Rodgersville | Populated Place | 137 | Williamson | 37 40 36 N | 088 46 11 W |
| Rods Fox Valley Seaplane Base | Airport | 231 | Kane | 42 04 00 N | 088 17 00 W |
| Roe Cemetery | Cemetery | 156 | Pope | 37 13 53 N | 088 31 09 W |
| Roe Ditch | Canal | 186 | Bureau | 41 29 30 N | 089 50 54 W |
| Roe Ditch Number 2 | Canal | 186 | Bureau | 41 29 58 N | 089 50 23 W |
| Roegge Lake | Reservoir | 175 | Morgan | 39 47 54 N | 090 17 53 W |
| Roemer Park | Park | 194 | Cook | 42 04 02 N | 087 44 36 W |
| Roemer Park | Park | 192 | Cook | 42 04 03 N | 087 44 37 W |
| Roesner Park | Park | 186 | Cook | 41 35 56 N | 087 41 07 W |
| Roessler Memorial Park | Park | 237 | Champaign | 40 17 56 N | 088 01 14 W |
| Roger Adams Laboratory | Building | 223 | Champaign | 40 06 27 N | 088 13 29 W |
| Roger Williams Park | Park | 205 | Lake | 42 09 58 N | 087 46 45 W |
| Rogers Brothers Landing Strip | Airport | 285 | Lee | 41 41 40 N | 088 59 34 W |
| Rogers Cemetery | Cemetery | 180 | Fayette | 39 07 48 N | 088 53 23 W |
| Rogers Cemetery | Cemetery | 186 | Hardin | 37 34 40 N | 088 17 12 W |
| Rogers Cemetery | Cemetery | 204 | Jackson | 37 53 06 N | 089 35 24 W |
| Rogers Cemetery | Cemetery | 203 | Morgan | 39 35 02 N | 089 58 32 W |
| Rogers Elementary School | School | 186 | Cook | 42 00 55 N | 087 41 47 W |
| Rogers Elementary School | School | 147 | Tazewell | 40 37 13 N | 089 37 03 W |
| Rogers Lake (historical) | Lake | 140 | Adams | 39 45 30 N | 091 16 50 W |
| Rogers Park | Park | 177 | Cook | 42 01 17 N | 087 39 52 W |
| Rogers Park | Park | 239 | Knox | 40 56 11 N | 090 22 31 W |
| Rogers Park (subdivision) | Populated Place | 185 | Cook | 42 00 31 N | 087 40 00 W |
| Rogers Park Lutheran Church | Church | 182 | Cook | 42 00 27 N | 087 40 20 W |
| Rogers Park Montessori School | School | 181 | Cook | 41 59 22 N | 087 39 45 W |
| Rogers Park Presbyterian Church | Church | 182 | Cook | 42 00 38 N | 087 40 03 W |
| Rogers Ridge | Ridge | 188 | Cook | 42 00 21 N | 087 40 50 W |
| Rogers School (historical) | School | 178 | Bond | 38 58 56 N | 089 22 57 W |
| Rogers School (historical) | School | 251 | Carroll | 42 09 44 N | 089 49 24 W |
| Rogers School (historical) | School | 218 | Coles | 39 23 47 N | 088 14 09 W |
| Rogers School (historical) | School | 201 | Edgar | 39 46 53 N | 087 43 42 W |
| Rogers School (historical) | School | 156 | Mason | 40 23 30 N | 089 44 04 W |
| Rogers School Park | Park | 185 | Cook | 42 00 50 N | 087 41 42 W |
| Roggy Cemetery | Cemetery | 232 | Bureau | 41 28 27 N | 089 34 04 W |
| Rogier Park | Park | 157 | Fayette | 38 58 17 N | 089 06 12 W |
| Rohr Park | Park | 167 | St. Clair | 38 35 28 N | 089 55 12 W |
| Rohrer | Populated Place | 213 | Morgan | 39 31 46 N | 089 57 35 W |
| Rohrer Church (historical) | Church | 208 | Morgan | 39 32 36 N | 089 56 46 W |
| Rohrer School (historical) | School | 208 | Fulton | 40 35 24 N | 090 01 07 W |
| Rohrsen School (historical) | School | 307 | Kane | 42 02 00 N | 088 28 45 W |
| Roland | Populated Place | 137 | White | 37 55 48 N | 088 15 48 W |
| Roland Cemetery | Cemetery | 134 | Pope | 37 23 48 N | 088 40 22 W |
| Roland Oil Field | Oilfield | 135 | White | 38 01 36 N | 088 15 16 W |
| Roland Olson County Forest Preserve | Reserve | 266 | Winnebago | 42 24 13 N | 088 57 15 W |
| Rolland W Lewis Community Center | Building | 152 | Jefferson | 38 18 32 N | 088 55 26 W |
| Rolling Acres Middle School | School | 224 | Peoria | 40 45 23 N | 089 37 26 W |
| Rolling Green | Populated Place | 216 | Coles | 39 27 48 N | 088 20 06 W |
| Rolling Green Country Club | Locale | 208 | Cook | 42 05 32 N | 087 57 14 W |
| Rolling Green School | School | 248 | Winnebago | 42 14 53 N | 089 02 14 W |
| Rolling Greens Mobile Home Park | Populated Place | 244 | Ogle | 41 56 16 N | 089 06 19 W |
| Rolling Hills Golf Course | Locale | 163 | Madison | 38 56 46 N | 090 13 01 W |
| Rolling Knolls Golf Club | Locale | 231 | Cook | 42 02 05 N | 088 14 00 W |
| Rolling Knolls Golf Club | Locale | 237 | Cook | 42 02 08 N | 088 13 58 W |
| Rolling Meadows | Populated Place | 219 | Cook | 42 05 03 N | 088 00 47 W |
| Rolling Meadows High School | School | 217 | Cook | 42 03 53 N | 088 00 56 W |
| Rolling Meadows Library | Building | 216 | Cook | 42 04 36 N | 088 01 17 W |
| Rolling Meadows Shopping Center | Locale | 217 | Cook | 42 04 47 N | 088 01 08 W |
| Rolling Meadows Use Area | Park | 189 | Shelby | 39 18 53 N | 088 41 47 W |
| Rollingbrook Park | Park | 259 | McLean | 40 28 12 N | 088 56 32 W |
| Rollingsville School (historical) | School | 250 | Boone | 42 18 21 N | 088 50 46 W |
| Rollins | Populated Place | 241 | Lake | 42 22 46 N | 088 03 46 W |
| Rollins Cemetery | Cemetery | 142 | Greene | 39 22 19 N | 090 31 45 W |
| Rollins Park | Park | 217 | Kane | 41 45 26 N | 088 17 30 W |