| Rostraver El Sch | 660 | regular | elementary |
| ROSWELL HIGH | 1,437 | regular | high |
| Roswell High School | 2,035 | regular | high |
| Roswell North Elementary School | 950 | regular | other |
| Rosy Mound School | 243 | regular | other |
| ROTAN K-12 | 273 | regular | other |
| Rotella Interdistrict Magnet School | 614 | regular | other |
| ROTH EL | 683 | regular | other |
| Rothenberg Preparatory Academy | 332 | regular | other |
| Rother Elementary | 280 | regular | elementary |
| ROTHSAY ELEMENTARY | 194 | regular | other |
| ROTHSAY SECONDARY | 140 | regular | other |
| Rothschild Elementary | 408 | regular | other |
| Rothschild Leadership Academy School | 498 | regular | middle |
| Roton Middle School | 463 | regular | middle |
| ROUGH HOLLOW EL | 702 | regular | other |
| ROUGHRIDER ACADEMY | 43 | alternative | high |
| ROUGHRIDER ELEMENTARY VIRTUAL ACADEMY | 38 | regular | elementary |
| ROUGHRIDER HIGH VIRTUAL ACADEMY | 38 | regular | high |
| Rougon Elementary School | 414 | regular | other |
| ROULHAC MIDDLE SCHOOL | 414 | regular | middle |
| Round Hill Elementary | 521 | regular | other |
| Round Hill Elementary | 720 | regular | other |
| ROUND HILL ELEMENTARY SCHOOL | 718 | regular | other |
| Round Lake Beach Elem School | 491 | regular | elementary |
| ROUND LAKE ELEMENTARY SCHOOL | 1,240 | regular | other |
| Round Lake Middle School | 783 | regular | middle |
| Round Lake Senior High School | 2,194 | regular | high |
| Round Lake-Brewster Elementary | 377 | regular | other |
| Round Lake-Brewster Middle School | 118 | regular | middle |
| Round Meadow Elementary | 513 | regular | elementary |
| Round Mountain Elementary School | 113 | regular | other |
| Round Mountain High School | 74 | regular | high |
| Round Mountain Middle School | 59 | regular | middle |
| ROUND PRAIRIE ELEMENTARY SCHOOL | 33 | regular | elementary |
| Round Rock Elementary School | 71 | regular | other |
| ROUND ROCK H S | 3,824 | regular | high |
| ROUND ROCK OPPORT CTR DAEP | 76 | alternative | other |
| Round Top Elementary | 581 | regular | other |
| ROUND TOP-CARMINE EL | 121 | regular | other |
| ROUND TOP-CARMINE H S | 114 | regular | other |
| Round Valley | 384 | regular | elementary |
| Round Valley AOI | 46 | regular | other |
| Round Valley Continuation | 21 | alternative | high |
| Round Valley Elementary | 68 | regular | elementary |
| Round Valley Elementary | 313 | regular | elementary |
| Round Valley Elementary School | 536 | regular | other |
| Round Valley High | 113 | regular | high |
| Round Valley High School | 386 | regular | high |
| Round Valley Middle School | 269 | regular | elementary |