District Contact & Information
Source: NCES CCD 2024–25Schools in Chaffey Joint Union High School District
11 schools listed| School | Level | Grades | Students | City |
|---|---|---|---|---|
| Alta Loma High | High | 9th – 12th | 2,386 | Alta Loma |
| Chaffey Community Day | High | 9th – 12th | 20 | Ontario |
| Chaffey District Online High | High | 9th – 12th | 93 | Ontario |
| Chaffey High | High | 9th – 12th | 3,127 | Ontario |
| Colony High | High | 9th – 12th | 2,109 | Ontario |
| Etiwanda High | High | 9th – 12th | 3,446 | Etiwanda |
| Los Osos High | High | 9th – 12th | 2,759 | Rancho Cucamonga |
| Montclair High | High | 9th – 12th | 2,515 | Montclair |
| Ontario High | High | 9th – 12th | 1,994 | Ontario |
| Rancho Cucamonga High | High | 9th – 12th | 3,221 | Rancho Cucamonga |
| Valley View High (Continuation) | High | 9th – 12th | 370 | Ontario |
Zip Codes Served by Chaffey Joint Union High School District
9 zip codes| Zip Code | City | County | State |
|---|---|---|---|
| 91701 | Rancho Cucamonga | San Bernardino County | CA |
| 91730 | Rancho Cucamonga | San Bernardino County | CA |
| 91737 | Rancho Cucamonga | San Bernardino County | CA |
| 91739 | Rancho Cucamonga | San Bernardino County | CA |
| 91761 | Ontario | San Bernardino County | CA |
| 91762 | Ontario | San Bernardino County | CA |
| 91763 | Montclair | San Bernardino County | CA |
| 91764 | Ontario | San Bernardino County | CA |
| 92358 | Lytle Creek | San Bernardino County | CA |
Frequently Asked Questions
About Chaffey Joint Union High School District
Chaffey Joint Union High School District is a public school district serving 9 zip codes in California, primarily in San Bernardino County. It carries an overall rating of 8/10 (Good), the 75th percentile among California districts. That rating reflects the share of students proficient in reading and math on state assessments (CAASPP 2023–24) and is ranked only against other California districts — scores are not comparable between states. Directory details on this page come from the NCES Common Core of Data, 2024–25.
Schools in this district
NCES lists 11 schools operating under Chaffey Joint Union High School District — 11 high. The largest by enrollment is Etiwanda High with 3,446 students. School-level enrollment comes from the NCES Common Core of Data school directory; a school with no reported enrollment is shown with a dash rather than a zero.
Checking your own address
District boundaries are address-specific and do not follow zip code lines exactly — a single zip code can be split between two or more districts. Use the zip codes listed above as a starting point, then confirm your assignment with the district office at (909)988-8511 before making a housing decision.