San Marino Unified School District operates 4 schools (grades KG–12). Individual school names, addresses, and attendance zone boundaries are available directly from the district.
| Metric | San Marino Unified School District | National Average | Comparison |
|---|---|---|---|
| Student Enrollment | 3,200 | 3,700 | ≈ Near average |
| Number of Schools | 4 | 6 | Varies by district |
| Per-Pupil Spending | $15,700/yr (est.) | $13,700/yr | State avg est. |
| District Type | Supervisory Union | Public District | — |
| Overall Rating | 10/10 — Great | — | Top 10% nationally |
About San Marino Unified School District
San Marino Unified School District is the public school district assigned to zip code 91108 in San Marino, California. Serving students from Kindergarten – 12th, this district is the primary public education system for families living in and around zip code 91108. The sections below cover the district’s resources, scale, rating, and everything families need to know about enrollment and school assignment.
Funding and Resources
Per-pupil spending at San Marino Unified School District runs approximately $15,700 annually, placing it near the California state average of approximately $16,500 and above the national average nationally (U.S. average: $13,700/year). Above-average spending generally translates to more instructional resources per student, stronger program variety at the middle and high school levels, and better-maintained facilities. Per-pupil spending directly affects teacher compensation, class sizes, elective course offerings, technology access, and the depth of student support services — making it one of the most meaningful structural indicators of district capacity.
District Scale and Program Breadth
San Marino Unified School District is a mid-sized district with 4 schools serving students from Kindergarten – 12th. The district enrolls approximately 3,200 students in total. Mid-sized districts strike a balance between community-scale relationships and sufficient program breadth. Most offer core academic tracks, basic extracurricular programs, and adequate student support services.
Understanding the 10/10 Rating
SchoolDistrictFinder rates San Marino Unified School District 10 out of 10 — top-tier among California public school districts. Our ratings are built from NCES Common Core of Data and measure structural factors: per-pupil expenditure, student-teacher ratio, enrollment stability, and school count. They do not incorporate test scores or graduation rates, which are not consistently available across all 13,500+ US districts in the NCES dataset.
San Marino Unified School District is among the highest-rated public school districts in California. Top-tier ratings reflect strong per-pupil investment, stable enrollment, and structural indicators consistent with high-performing educational systems. Homes in and around zip code 91108 often carry a measurable premium relative to neighboring areas served by lower-rated districts. Families moving here for school quality will find a well-resourced district. Even within top-rated districts, individual school quality varies — confirm your specific school assignments directly with the district.
Enrollment for Families in Zip Code 91108
Children in zip code 91108 are assigned to San Marino Unified School District for public school enrollment, covering grades Kindergarten – 12th. School assignments are address-specific — your elementary, middle, and high school placements depend on your exact street address within zip code 91108, not just your neighborhood. Two homes on opposite ends of the same zip code may be assigned to different schools within the same district.
To confirm your specific school assignments, contact San Marino Unified School District at (626)299-7000 or visit www.smusd.us. Typical enrollment documents include a signed lease or mortgage statement, birth certificate, state-required immunization documentation, and recent report cards or transcripts. If your child has an IEP or 504 plan, bring that documentation to enrollment — California districts are required to continue services within a reasonable period. Fall enrollment windows typically open in late winter or early spring; contact the district for exact dates and required steps.
School Districts and Home Values in San Marino
Research consistently shows that district assignment affects residential property values. Because San Marino Unified School District serves zip code 91108, homes in and around zip code 91108 often carry a measurable premium over comparable properties in adjacent lower-rated districts. District boundaries are address-specific — verify the exact district assignment for any property you’re seriously considering rather than assuming based on the neighborhood. A single block can place two adjacent homes in different districts with different ratings and different annual property tax implications.
Use the property tax estimator on this page to calculate estimated annual tax obligations based on your target purchase price. In California, property taxes are a primary funding source for public schools — your tax payments directly support San Marino Unified School District programs and staff. Understanding both district quality and the associated tax burden is essential financial due diligence before committing to any home in zip code 91108.
Data Sources and Accuracy
All district information on this page is sourced from the NCES Common Core of Data (CCD) 2024–2025, the U.S. Department of Education’s annual census of all public school districts — the same dataset used by researchers, journalists, and policymakers to analyze American public education. District boundaries, school assignments, phone numbers, and per-pupil expenditure figures are updated annually when NCES publishes new data, typically in spring. Always verify your specific school assignment and enrollment requirements directly with San Marino Unified School District before making any housing or enrollment decision based on zip code 91108 data.