School District · California
Grossmont Union High School District
📍 El Cajon, CA · San Diego County · NCES LEAID 0616230
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 1043, La Mesa, CA 91944
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Enrollment
16,738 students
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NCES District ID (LEAID)
0616230
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District Type
Public School District
Zip Codes Served by Grossmont Union High School District13 zip codes
Frequently Asked Questions
What zip codes are in Grossmont Union High School District?▼
Grossmont Union High School District serves 13 zip codes: 91901, 91917, 91935, 91941, 91942, 91945, 91977, 91978, 92019, 92020, 92021, 92040, 92071. 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 Grossmont Union High School District rated?▼
Grossmont Union High School District has an overall rating of 6 out of 10 (Average), based on the share of students proficient in reading and math on state assessments (NCES EDFacts). That places it in the 56th percentile among California school districts. Ratings are percentile-ranked within California only and are not comparable across states.
How many students attend Grossmont Union High School District?▼
The NCES Common Core of Data directory reports enrollment of 16,738 students across 15 schools for Grossmont Union High School District.
What grades does Grossmont Union High School District serve?▼
Grossmont Union High School District is listed in the NCES directory as serving grades Kindergarten – 12th.
How do I contact Grossmont Union High School District?▼
You can reach Grossmont Union High School District by phone at (619)644-8000 or by mail at PO Box 1043, La Mesa, CA 91944. Contact details come from the NCES district directory and are the best way to confirm which school your address is assigned to.
About Grossmont Union High School District
Grossmont Union High School District is a public school district serving 13 zip codes in California, primarily in San Diego County. It carries an overall rating of 6/10 (Average), the 56th 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 (619)644-8000 before making a housing decision.