| American Academy | 2,559 | 16.4:1 | Combined School |
| Rock Canyon High School | 2,377 | 21.5:1 | High School |
| Mountain Vista High School | 2,259 | 20.3:1 | High School |
| Legend High School | 2,228 | 20.7:1 | High School |
| Chaparral High School | 2,009 | 19.4:1 | High School |
| Castle View High School | 1,990 | 21.1:1 | High School |
| Thunderridge High School | 1,881 | 20.6:1 | High School |
| Douglas County High School | 1,758 | 18.6:1 | High School |
| Highlands Ranch High School | 1,538 | 17.8:1 | High School |
| STEM School Highlands Ranch | 1,498 | 20.1:1 | Combined School |
| Ponderosa High School | 1,402 | 18.4:1 | High School |
| HOPE Online Learning Academy High School | 1,361 | 32.7:1 | High School |
| Skyview Academy | 1,273 | 15.0:1 | Combined School |
| Rocky Heights Middle School | 1,162 | 19.6:1 | Middle School |
| Cimarron Middle | 1,116 | 18.9:1 | Middle School |
| Leman Classical Academy | 1,043 | 20.4:1 | Combined School |
| Aspen View Academy | 961 | 17.9:1 | Combined School |
| Mesa Middle School | 957 | 16.5:1 | Middle School |
| Ben Franklin Academy | 893 | 19.6:1 | Combined School |
| Mountain Ridge Middle School | 865 | 19.4:1 | Middle School |
| Sagewood Middle School | 824 | 16.7:1 | Middle School |
| Ranch View Middle School | 822 | 17.9:1 | Middle School |
| Pine Lane Elementary | 791 | 16.0:1 | Combined School |
| Sierra Middle School | 779 | 17.7:1 | Middle School |
| Castle Rock Middle School | 748 | 16.7:1 | Middle School |
| World Compass Academy | 711 | 15.6:1 | Combined School |
| Parker Core Knowledge Charter School | 706 | 15.6:1 | Combined School |
| North Star Academy | 683 | 19.5:1 | Combined School |
| Prairie Crossing Elementary School | 679 | 17.4:1 | Combined School |
| Clear Sky Elementary | 675 | 17.4:1 | Combined School |
| Gold Rush Elementary | 672 | 18.1:1 | Elementary School |
| Cresthill Middle School | 670 | 15.8:1 | Middle School |
| Mammoth Heights Elementary | 649 | 15.3:1 | Combined School |
| Parker Performing Arts | 639 | 19.0:1 | Combined School |
| Eagle Ridge Elementary School | 603 | 16.9:1 | Combined School |
| Academy Charter School | 582 | 15.5:1 | Combined School |
| Sage Canyon Elementary | 570 | 17.5:1 | Elementary School |
| Cherokee Trail Elementary School | 567 | 16.4:1 | Combined School |
| Northridge Elementary School | 566 | 16.2:1 | Combined School |
| Challenge to Excellence Charter School | 538 | 18.3:1 | Combined School |
| Meadow View Elementary School | 533 | 19.0:1 | Combined School |
| Stone Mountain Elementary | 515 | 17.2:1 | Combined School |
| Pine Grove Elementary School | 506 | 15.6:1 | Combined School |
| Buffalo Ridge Elementary School | 499 | 18.8:1 | Elementary School |
| Fox Creek Elementary School | 479 | 16.8:1 | Combined School |
| Platte River Charter Academy | 477 | 16.7:1 | Combined School |
| Rock Ridge Elementary School | 475 | 15.8:1 | Combined School |
| Coyote Creek Elementary School | 470 | 18.0:1 | Combined School |
| Flagstone Elementary School | 470 | 17.7:1 | Combined School |
| Soaring Hawk Elementary School | 460 | 16.4:1 | Combined School |
| Castle Rock Elementary School | 449 | 16.0:1 | Combined School |
| Iron Horse Elementary School | 448 | 16.6:1 | Elementary School |
| DC Montessori Charter School | 442 | 16.4:1 | Combined School |
| Pioneer Elementary School | 440 | 15.4:1 | Elementary School |
| Wildcat Mountain Elementary School | 438 | 15.0:1 | Elementary School |
| Summit View Elementary School | 430 | 17.1:1 | Combined School |
| Roxborough Intermediate | 419 | 17.2:1 | Combined School |
| Legacy Point Elementary School | 416 | 16.5:1 | Elementary School |
| Redstone Elementary School | 412 | 15.8:1 | Combined School |
| South Ridge Elementary An IB World School | 411 | 14.8:1 | Elementary School |
| Arrowwood Elementary School | 406 | 17.3:1 | Combined School |
| Acres Green Elementary School | 404 | 15.5:1 | Combined School |
| HOPE Online Learning Academy Middle School | 394 | 19.6:1 | Middle School |
| Bear Canyon Elementary School | 393 | 16.6:1 | Combined School |
| Eldorado Elementary School | 392 | 14.2:1 | Combined School |
| Frontier Valley Elementary School | 388 | 18.5:1 | Elementary School |
| Lone Tree Elementary | 388 | 19.6:1 | Combined School |
| Renaissance Expedition Learn Outward Bound School | 381 | 18.0:1 | Combined School |
| Heritage Elementary School | 372 | 17.0:1 | Combined School |
| Timber Trail Elementary School | 369 | 17.2:1 | Elementary School |
| Sand Creek Elementary School | 365 | 15.3:1 | Combined School |
| Franktown Elementary School | 365 | 16.4:1 | Elementary School |
| Global Village Academy - Douglas County | 364 | 16.9:1 | Elementary School |
| Roxborough Elementary School | 360 | 17.8:1 | Elementary School |
| Saddle Ranch Elementary School | 353 | 15.8:1 | Combined School |
| Renaissance Secondary School | 347 | 19.4:1 | Combined School |
| Cougar Run Elementary School | 344 | 17.2:1 | Combined School |
| Mountain View Elementary School | 335 | 18.0:1 | Elementary School |
| Copper Mesa Elementary School | 319 | 15.4:1 | Combined School |
| Trailblazer Elementary School | 312 | 14.5:1 | Combined School |
| Northeast Elementary School | 292 | 15.5:1 | Elementary School |
| Larkspur Elementary School | 205 | 14.4:1 | Combined School |
| Sedalia Elementary School | 203 | 11.9:1 | Combined School |
| Daniel C Oakes High School--Castle Rock | 149 | 12.1:1 | High School |
| Eagle Academy | 123 | 9.7:1 | High School |
| Early Childhood Center | 119 | 39.7:1 | Elementary School |
| eDCSD | 67 | 5.7:1 | High School |
| Cherry Valley Elementary School | 39 | 11.5:1 | Combined School |