| School | District | County |
|---|---|---|
| Heatherwood | Boulder Valley Re | Boulder |
| Henderson | Brighton | Adams |
| Henry | Colorado Springs | El Paso |
| Heritage | Cherry Creek | Arapahoe |
| Heritage | Douglas County Re | Douglas |
| Heritage | Pueblo City | Pueblo |
| High Peaks | Boulder Valley Re | Boulder |
| High Plains | Cherry Creek | Arapahoe |
| High Plains | Academy | El Paso |
| Highland | Littleton | Arapahoe |
| Highland | Garfield | Garfield |
| Highland | Ault-Highland | Weld |
| Highland Park | Pueblo City | Pueblo |
| Highline Academy | Denver County | Denver |
| Highline Community | Cherry Creek | Arapahoe |
| Hillcrest | Adams Five Star Schools | Adams |
| Hoehne | Hoehne Reorganized | Las Animas |
| Hoff | Keenesburg | Weld |
| Holly Hills | Cherry Creek | Arapahoe |
| Holm | Denver County | Denver |
| Holyoke | Holyoke | Phillips |
| Homestead | Cherry Creek | Arapahoe |
| Hope Online Learning Academy Co-Op | Vilas | Baca |
| Hopkins | Littleton | Arapahoe |
| Horizons K-8 | Boulder Valley Re | Boulder |
| Hotchkiss | Delta County | Delta |
| Howbert | Colorado Springs | El Paso |
| Howell K-8 | Denver County | Denver |
| Hudson | Keenesburg | Weld |
| Hulstrom | Adams Five Star Schools | Adams |
| Hunt | Colorado Springs | El Paso |
| Hunters Glen | Adams Five Star Schools | Adams |
| Hutchinson | Jefferson County | Jefferson |
| Hygiene | St Vrain Valley Re | Boulder |
| Ignacio | Ignacio Jt | La Plata |
| Ignacio Intermediate | Ignacio Jt | La Plata |
| Independence | Cherry Creek | Arapahoe |
| Indian Peaks | St Vrain Valley Re | Boulder |
| Indian Ridge | Cherry Creek | Arapahoe |
| Iowa | Adams-Arapahoe | Arapahoe |
| Irish | Poudre | Larimer |
| Iron Horse | Douglas County Re | Douglas |
| Irving | Pueblo City | Pueblo |
| Ivy Stockwell | Thompson | Larimer |
| Ivywild | Colorado Springs | El Paso |
| Jackson | Colorado Springs | El Paso |
| Jackson | Greeley | Weld |
| Jamaica | Adams-Arapahoe | Arapahoe |
| James Irwin | Harrison | El Paso |
| Jefferson | Colorado Springs | El Paso |