School District · California
Castro Valley Unified School District
📍 Castro Valley, CA · Alameda County · NCES LEAID 0607800
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
PO Box 2146, Castro Valley, CA 94546
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NCES District ID (LEAID)
0607800
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District Type
Public School District
Zip Codes Served by Castro Valley Unified School District3 zip codes
Frequently Asked Questions
What zip codes are in Castro Valley Unified School District?▼
Castro Valley Unified School District serves 3 zip codes: 94546, 94552, 94619. 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 Castro Valley Unified School District rated?▼
Castro Valley Unified School District has an overall rating of 9 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 88th percentile among California school districts. Ratings are percentile-ranked within California only and are not comparable across states.
How many students attend Castro Valley Unified School District?▼
The NCES Common Core of Data directory reports enrollment of 9,207 students across 16 schools for Castro Valley Unified School District.
What grades does Castro Valley Unified School District serve?▼
Castro Valley Unified School District is listed in the NCES directory as serving grades Kindergarten – 12th.
How do I contact Castro Valley Unified School District?▼
You can reach Castro Valley Unified School District by phone at (510)537-3000 or by mail at PO Box 2146, Castro Valley, CA 94546. Contact details come from the NCES district directory and are the best way to confirm which school your address is assigned to.
About Castro Valley Unified School District
Castro Valley Unified School District is a public school district serving 3 zip codes in California, primarily in Alameda County. It carries an overall rating of 9/10 (Excellent), the 88th 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 (510)537-3000 before making a housing decision.