📊 Data: NCES CCD 2024–2025·🔄 Updated: August 2026·Editorial standards
📍 El Cajon, CA · San Diego County

Grossmont Union High School District

Grades Kindergarten – 12th · 16,738 students · 15 schools · 13 zip codes

6
out of 10 Rating Average
State reading & math proficiency · 56th percentile among California districts. Ranked within California only — not comparable across states.
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School District · California
Grossmont Union High School District
📍 El Cajon, CA · San Diego County · NCES LEAID 0616230
6/10
Rating
16,738
Students
15
Schools
Kindergarten – 12th
Grade Span
13
Zip Codes

District Contact & Information

Source: NCES CCD 2024–25
📚
Grades Served
Kindergarten – 12th
📞
District Phone
(619)644-8000
🌐
District Website
www.guhsd.net
📍
District Mailing Address
PO Box 1043, La Mesa, CA 91944
🎓
Enrollment
16,738 students
🏫
Schools
15
🏙
County
San Diego County, CA
🏷
NCES District ID (LEAID)
0616230
🏛
District Type
Public School District

Schools in Grossmont Union High School District

15 schools listed
SchoolLevelGradesStudentsCity
Chaparral HighHigh9th – 12th45El Cajon
El Cajon Valley HighHigh9th – 12th1,701El Cajon
El Capitan HighHigh9th – 12th1,810Lakeside
Elite AcademyHigh9th – 12th34El Cajon
Granite Hills HighHigh9th – 12th2,331El Cajon
Grossmont HighHigh9th – 12th2,172La Mesa
Grossmont Middle College HighHigh11th – 12th37El Cajon
IDEA CenterHigh9th – 12th127El Cajon
MERIT AcademyHigh9th – 12th68El Cajon
Monte Vista HighHigh9th – 12th1,543Spring Valley
Mount Miguel HighHigh9th – 12th1,539Spring Valley
REACH AcademyHigh9th – 12th21El Cajon
Santana HighHigh9th – 12th1,621Santee
Valhalla HighHigh9th – 12th1,728El Cajon
West Hills HighHigh9th – 12th1,624Santee

Zip Codes Served by Grossmont Union High School District

13 zip codes
Zip CodeCityCountyState
91901AlpineSan Diego CountyCA
91917DulzuraSan Diego CountyCA
91935JamulSan Diego CountyCA
91941La MesaSan Diego CountyCA
91942La MesaSan Diego CountyCA
91945Lemon GroveSan Diego CountyCA
91977Spring ValleySan Diego CountyCA
91978Spring ValleySan Diego CountyCA
92019El CajonSan Diego CountyCA
92020El CajonSan Diego CountyCA
92021El CajonSan Diego CountyCA
92040LakesideSan Diego CountyCA
92071SanteeSan Diego CountyCA

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 (CAASPP 2023–24). 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.
What schools are in Grossmont Union High School District?▼
NCES lists 15 schools operating under Grossmont Union High School District: 15 high. Each school's grade span, enrollment and city are listed on this page. Attendance zones are set by the district and a school on this list is not necessarily the one your address is assigned to.
How do I contact Grossmont Union High School District?▼
You can reach Grossmont Union High School District by phone at (619)644-8000 or online at www.guhsd.net 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 (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 15 schools operating under Grossmont Union High School District — 15 high. The largest by enrollment is Granite Hills High with 2,331 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 (619)644-8000 before making a housing decision.

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