School District · California
Walnut Valley Unified School District
📍 Diamond Bar, CA · Los Angeles County · NCES LEAID 0641280
Kindergarten – 12th
Grade Span
District Contact & InformationSource: NCES CCD 2024–25
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Grades Served
Kindergarten – 12th
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District Mailing Address
880 S. Lemon Ave., Walnut, CA 91789
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Enrollment
13,494 students
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NCES District ID (LEAID)
0641280
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District Type
Public School District
Zip Codes Served by Walnut Valley Unified School District2 zip codes
Frequently Asked Questions
What zip codes are in Walnut Valley Unified School District?▼
Walnut Valley Unified School District serves 2 zip codes: 91765, 91789. Zip codes and district boundaries do not line up exactly, so confirm your exact address with the district office before you rely on an assignment.
How is Walnut Valley Unified School District rated?▼
Walnut Valley Unified School District has an overall rating of 10 out of 10 (Excellent), based on the share of students proficient in reading and math on state assessments (NCES EDFacts). That places it in the 95th percentile among California school districts. Ratings are percentile-ranked within California only and are not comparable across states.
How many students attend Walnut Valley Unified School District?▼
The NCES Common Core of Data directory reports enrollment of 13,494 students across 15 schools for Walnut Valley Unified School District.
What grades does Walnut Valley Unified School District serve?▼
Walnut Valley Unified School District is listed in the NCES directory as serving grades Kindergarten – 12th.
How do I contact Walnut Valley Unified School District?▼
You can reach Walnut Valley Unified School District by phone at (909)595-1261 or by mail at 880 S. Lemon Ave., Walnut, CA 91789. Contact details come from the NCES district directory and are the best way to confirm which school your address is assigned to.
About Walnut Valley Unified School District
Walnut Valley Unified School District is a public school district serving 2 zip codes in California, primarily in Los Angeles County. It carries an overall rating of 10/10 (Excellent), the 95th percentile among California districts. That rating reflects the share of students proficient in reading and math on state assessments (NCES EDFacts, 2021–22 for most districts with a 2017–18 fallback for the rest) 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.
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)595-1261 before making a housing decision.