Rankings · Colorado
Largest schools in Boulder County, Colorado
Ranked by enrollment — academic rankings appear once test-score data is loaded.
| # | School | City | District | Enrollment |
|---|---|---|---|---|
| 1 | Boulder High School | Boulder | Boulder Valley School District No. Re2 | 2131 |
| 2 | Fairview High School | Boulder | Boulder Valley School District No. Re2 | 2039 |
| 3 | Monarch High School | Louisville | Boulder Valley School District No. Re2 | 1580 |
| 4 | Skyline High School | Longmont | St. Vrain Valley School District No. Re1J | 1520 |
| 5 | Centaurus High School | Lafayette | Boulder Valley School District No. Re2 | 1482 |
| 6 | Peak To Peak Charter School | Lafayette | Boulder Valley School District No. Re2 | 1453 |
| 7 | Silver Creek High School | Longmont | St. Vrain Valley School District No. Re1J | 1301 |
| 8 | Longmont High School | Longmont | St. Vrain Valley School District No. Re1J | 1265 |
| 9 | Niwot High School | Niwot | St. Vrain Valley School District No. Re1J | 1200 |
| 10 | Boulder Universal | Boulder | Boulder Valley School District No. Re2 | 954 |
| 11 | Timberline Pk-8 | Longmont | St. Vrain Valley School District No. Re1J | 820 |
| 12 | Twin Peaks Charter Academy | Longmont | St. Vrain Valley School District No. Re1J | 808 |
| 13 | Flagstaff Charter Academy | Longmont | St. Vrain Valley School District No. Re1J | 806 |
| 14 | Altona Middle School | Longmont | St. Vrain Valley School District No. Re1J | 794 |
| 15 | Apex Home School Enrichment Program | Longmont | St. Vrain Valley School District No. Re1J | 784 |
| 16 | Westview Middle School | Longmont | St. Vrain Valley School District No. Re1J | 706 |
| 17 | Eldorado K-8 School | Superior | Boulder Valley School District No. Re2 | 690 |
| 18 | Monarch K-8 School | Louisville | Boulder Valley School District No. Re2 | 680 |
| 19 | Meadowlark School | Erie | Boulder Valley School District No. Re2 | 662 |
| 20 | Angevine Middle School | Lafayette | Boulder Valley School District No. Re2 | 638 |
| 21 | Trail Ridge Middle School | Longmont | St. Vrain Valley School District No. Re1J | 609 |
| 22 | Red Hawk Elementary | Erie | St. Vrain Valley School District No. Re1J | 608 |
| 23 | Louisville Middle School | Louisville | Boulder Valley School District No. Re2 | 603 |
| 24 | Blue Mountain Elementary | Longmont | St. Vrain Valley School District No. Re1J | 555 |
| 25 | Centennial Middle School | Boulder | Boulder Valley School District No. Re2 | 548 |
| 26 | Casey Middle School | Boulder | Boulder Valley School District No. Re2 | 506 |
| 27 | Fall River Elementary School | Longmont | St. Vrain Valley School District No. Re1J | 488 |
| 28 | Eagle Crest Elementary School | Longmont | St. Vrain Valley School District No. Re1J | 486 |
| 29 | Pioneer Bilingual Elementary School | Lafayette | Boulder Valley School District No. Re2 | 478 |
| 30 | Southern Hills Middle School | Boulder | Boulder Valley School District No. Re2 | 476 |
| 31 | Nevin Platt Middle School | Boulder | Boulder Valley School District No. Re2 | 473 |
| 32 | Louisville Elementary School | Louisville | Boulder Valley School District No. Re2 | 453 |
| 33 | Ryan Elementary School | Lafayette | Boulder Valley School District No. Re2 | 452 |
| 34 | Crest View Elementary School | Boulder | Boulder Valley School District No. Re2 | 446 |
| 35 | Manhattan Middle School Of The Arts And Academics | Boulder | Boulder Valley School District No. Re2 | 439 |
| 36 | Lafayette Elementary School | Lafayette | Boulder Valley School District No. Re2 | 437 |
| 37 | Superior Elementary School | Superior | Boulder Valley School District No. Re2 | 435 |
| 38 | University Hill Elementary School | Boulder | Boulder Valley School District No. Re2 | 433 |
| 39 | Columbine Elementary School | Boulder | Boulder Valley School District No. Re2 | 432 |
| 40 | Sunset Middle School | Longmont | St. Vrain Valley School District No. Re1J | 430 |
| 41 | Burlington Elementary School | Longmont | St. Vrain Valley School District No. Re1J | 427 |
| 42 | Longs Peak Middle School | Longmont | St. Vrain Valley School District No. Re1J | 426 |
| 43 | Foothill Elementary School | Boulder | Boulder Valley School District No. Re2 | 424 |
| 44 | Fireside Elementary School | Louisville | Boulder Valley School District No. Re2 | 418 |
| 45 | Superior Elementary School | Superior | Boulder Valley School District No. Re2 | 417 |
| 46 | Niwot Elementary School | Niwot | St. Vrain Valley School District No. Re1J | 404 |
| 47 | Rocky Mountain Elementary School | Longmont | St. Vrain Valley School District No. Re1J | 400 |
| 48 | Lyons Middle/Senior High School | Lyons | St. Vrain Valley School District No. Re1J | 398 |
| 49 | Creekside Elementary School At Martin Park | Boulder | Boulder Valley School District No. Re2 | 390 |
| 50 | Alpine Elementary School | Longmont | St. Vrain Valley School District No. Re1J | 389 |
| 51 | Whittier Elementary School | Boulder | Boulder Valley School District No. Re2 | 378 |
| 52 | Rocky Mountain Elementary School | Longmont | St. Vrain Valley School District No. Re1J | 365 |
| 53 | Summit Middle Charter School | Boulder | Boulder Valley School District No. Re2 | 356 |
| 54 | Burlington Elementary School | Longmont | St. Vrain Valley School District No. Re1J | 349 |
| 55 | Horizons K-8 School | Boulder | Boulder Valley School District No. Re2 | 348 |
| 56 | Creekside Elementary School At Martin Park | Boulder | Boulder Valley School District No. Re2 | 346 |
| 57 | Bear Creek Elementary School | Boulder | Boulder Valley School District No. Re2 | 343 |
| 58 | Erie Elementary School | Erie | St. Vrain Valley School District No. Re1J | 341 |
| 59 | Eisenhower Elementary School | Boulder | Boulder Valley School District No. Re2 | 336 |
| 60 | Coal Creek Elementary School | Louisville | Boulder Valley School District No. Re2 | 333 |
| 61 | Whittier Elementary School | Boulder | Boulder Valley School District No. Re2 | 330 |
| 62 | Douglass Elementary School | Boulder | Boulder Valley School District No. Re2 | 318 |
| 63 | Hygiene Elementary School | Longmont | St. Vrain Valley School District No. Re1J | 311 |
| 64 | New Vista High School | Boulder | Boulder Valley School District No. Re2 | 309 |
| 65 | Sanborn Elementary School | Longmont | St. Vrain Valley School District No. Re1J | 309 |
| 66 | Central Elementary School | Longmont | St. Vrain Valley School District No. Re1J | 307 |
| 67 | Alicia Sanchez International School | Lafayette | Boulder Valley School District No. Re2 | 303 |
| 68 | Longmont Estates Elementary School | Longmont | St. Vrain Valley School District No. Re1J | 302 |
| 69 | Northridge Elementary School | Longmont | St. Vrain Valley School District No. Re1J | 287 |
| 70 | Boulder Community School/Integrated Studies | Boulder | Boulder Valley School District No. Re2 | 285 |
| 71 | Mountain View Elementary School | Longmont | St. Vrain Valley School District No. Re1J | 285 |
| 72 | Indian Peaks Elementary School | Longmont | St. Vrain Valley School District No. Re1J | 283 |
| 73 | High Peaks Elementary School | Boulder | Boulder Valley School District No. Re2 | 273 |
| 74 | Columbine Elementary School | Longmont | St. Vrain Valley School District No. Re1J | 258 |
| 75 | Lyons Elementary School | Lyons | St. Vrain Valley School District No. Re1J | 255 |
| 76 | St. Vrain Community Montessori School | Longmont | St. Vrain Valley School District No. Re1J | 249 |
| 77 | Heatherwood Elementary School | Boulder | Boulder Valley School District No. Re2 | 245 |
| 78 | Community Montessori School | Boulder | Boulder Valley School District No. Re2 | 242 |
| 79 | Mesa Elementary School | Boulder | Boulder Valley School District No. Re2 | 236 |
| 80 | Nederland Middle-Senior High School | Nederland | Boulder Valley School District No. Re2 | 235 |
| 81 | Nederland Elementary School | Nederland | Boulder Valley School District No. Re2 | 204 |
| 82 | Flatirons Elementary School | Boulder | Boulder Valley School District No. Re2 | 172 |
| 83 | Arapahoe Ridge High School | Boulder | Boulder Valley School District No. Re2 | 135 |
| 84 | Olde Columbine High School | Longmont | St. Vrain Valley School District No. Re1J | 111 |
| 85 | Mapleton Early Childhood Center | Boulder | Boulder Valley School District No. Re2 | 109 |
| 86 | St. Vrain Global Online Academy | Longmont | St. Vrain Valley School District No. Re1J | 107 |
| 87 | Boulder Prep Charter High School | Boulder | Boulder Valley School District No. Re2 | 106 |
| 88 | Mapleton Early Childhood Center | Boulder | Boulder Valley School District No. Re2 | 92 |
| 89 | Justice High Charter School | Lafayette | Boulder Valley School District No. Re2 | 87 |
| 90 | Gold Hill Elementary School | Gold Hill | Boulder Valley School District No. Re2 | 25 |
| 91 | Jamestown Elementary School | Jamestown | Boulder Valley School District No. Re2 | 19 |