If you ask any real estate agent in the San Gabriel Valley which school district drives the strongest buyer demand, the answer is almost always the same: San Marino Unified School District. Ranked #6 in California and #2 in Los Angeles County by Niche for 2026, SMUSD places in the top 0.5% of school districts nationally. State test proficiency rates of 83% in math and 86% in reading more than double the California averages of 33% and 47%, respectively.
The district is compact by design. Four schools serve roughly 3,000 students across a city that covers less than four square miles. That small scale is not a limitation. It is the reason San Marino consistently outperforms districts with far larger budgets and enrollment figures. Small class counts, a deeply invested parent community, and a municipal culture that treats education as infrastructure produce results that most suburban systems never reach.
This guide breaks down every school in the district, compares San Marino to neighboring Arcadia and South Pasadena, explains how school boundaries affect home prices, and gives families considering a move the data they need to make a confident decision.
San Marino USD at a Glance
San Marino Unified School District serves students from pre-kindergarten through 12th grade across four campuses: two elementary schools, one middle school, and one high school. Unlike larger districts where performance varies wildly from campus to campus, every school in SMUSD ranks in the top 1% of California public schools for overall test scores.
What Makes SMUSD Different
The district operates with a student-teacher ratio of 21:1 at the elementary level and 19:1 at the high school, both below state averages. It supports Gifted and Talented programs at every level. The high school maintains partnerships with Caltech for STEM research courses and the Huntington Library for humanities enrichment, offering students access to institutions that most districts cannot replicate.
| Metric | San Marino USD | CA State Average |
|---|---|---|
| Niche 2026 State Rank | #6 | N/A |
| Math Proficiency (CAASPP) | 83% | 33% |
| Reading Proficiency (CAASPP) | 86% | 47% |
| Science Proficiency (CAST) | 70.8% | 32.7% |
| Graduation Rate | 98.5% | ~87% |
| Student-Teacher Ratio (HS) | 19:1 | 21:1 |
| 4-Year College Enrollment | 77% | ~38% |
Elementary Schools (K-5)
San Marino has two elementary schools, each serving different attendance zones within the city. Both are ranked in the top 1% of California elementary schools by multiple ranking organizations. Families do not get to choose between the two; your home address determines your child's campus.
K.L. Carver Elementary School
Carver Elementary sits in the western portion of San Marino and draws families from neighborhoods closer to Huntington Drive and the Lacy Park area. With 87% math and 89% ELA proficiency, the school runs well ahead of the district average, which is itself more than double the state average. The student body is approximately 67% Asian, 15% White, 12% multiracial, and 5% Hispanic. Carver supports a GATE program and emphasizes project-based learning in upper elementary grades.
Valentine Elementary School
Valentine Elementary serves the eastern half of San Marino and consistently ranks among the strongest elementary campuses in LA County. Its 91% math proficiency rate is exceptional even by San Marino standards. The school earned a GreatSchools rating of 9 out of 10 and places in the top 1% of all California schools. Valentine has a strong parent organization that funds enrichment programs, campus improvements, and classroom technology beyond what the district budget covers.
Huntington Middle School (6-8)
Huntington Middle School
Huntington Middle School is the sole middle school in SMUSD, meaning every student in San Marino passes through the same campus during grades six through eight. This creates a unified student cohort that feeds directly into San Marino High School, giving teachers and administrators a consistent pipeline to prepare students for rigorous coursework ahead.
Ranked #14 among California middle schools by Niche, Huntington offers a Gifted and Talented program, advanced math tracks, and electives in visual arts, performing arts, and world languages. With 84% math and 87% ELA proficiency, the school maintains the district's pattern of doubling (or more) statewide averages in both subjects.
San Marino High School (9-12)
San Marino High School
AP and Honors Program
San Marino High earned AP Platinum status from the College Board, the highest distinction the organization awards. The school offers 16 AP courses and 15 honors courses across every core academic department. In the Class of 2025, 88% of students took at least one AP course, with the average student completing 5.4 AP classes during their high school career. Despite increasing enrollment in AP sections year over year, pass rates have also risen, which suggests the school is not simply expanding access but actually improving instruction.
College Placement: Class of 2025
The numbers speak for themselves: 77% of the Class of 2025 enrolled at four-year colleges, and 23% enrolled in community college with transfer intent. UC acceptance rates increased 64% over the previous year. The acceptance rate at UC Berkeley ran double the national average, and six students earned admission to Ivy League institutions including Brown, Cornell, Princeton, and Yale.
STEM and Arts Programs
SMHS offers a curriculum that goes well beyond standard coursework. A STEM research course developed with Caltech professors gives students direct access to university-level research methodology. A humanities course built in partnership with the Huntington Library, Art Museum, and Botanical Gardens integrates primary source analysis with hands-on archival work. Career Technical Education pathways cover Digital Arts, Architectural Design, Computer Science, Animation, Media Arts, Fashion Design, and Entrepreneurship.
National Blue Ribbon Recognition
In 2024, San Marino High School was named a National Blue Ribbon School by the U.S. Department of Education. This is the most prestigious honor available to American schools and is awarded based on overall academic excellence and progress in closing achievement gaps. Combined with AP Platinum status, SMHS is one of very few schools in California to hold both distinctions simultaneously.
Key Takeaway
San Marino High is not simply a well-ranked school. It is a National Blue Ribbon, AP Platinum campus where nearly nine out of ten students take AP courses, three in four go directly to four-year universities, and the graduation rate stands at 98.5%. For families prioritizing education outcomes, it is the strongest public high school option in the San Gabriel Valley.
San Marino vs. Arcadia vs. South Pasadena
San Marino does not exist in a vacuum. Families relocating to the San Gabriel Valley often compare three top-tier districts: San Marino USD, Arcadia USD, and South Pasadena USD. Each has genuine strengths. The differences come down to budget, program breadth, and the price of admission through home costs.
| Metric | San Marino USD | Arcadia USD | South Pasadena USD |
|---|---|---|---|
| Niche 2026 CA Rank | #6 | #10 (approx.) | #8 |
| LA County Rank | #2 | Top 5 | #4 |
| Overall Grade | A+ | A+ | A+ |
| Math Proficiency | 83% | 68% | ~72% |
| Reading Proficiency | 86% | 75% | ~78% |
| HS Graduation Rate | 98.5% | ~98% | ~97% |
| Total Schools | 4 | 10+ | 5 |
| AP Courses (HS) | 16 | 22 | ~20 |
| Median Home Price | $3.3M | $1.8M | $1.7M |
Where San Marino Wins
On raw academic performance, San Marino is the clear leader. Its 83% math proficiency rate is 15 percentage points ahead of Arcadia and roughly 11 points ahead of South Pasadena. The district's small size (four schools, roughly 3,000 students) allows for tighter coordination between campuses and more direct parent-to-administrator access. The Caltech STEM partnership and Huntington Library humanities program are unique to SMUSD and do not have equivalents in neighboring districts.
Where Arcadia and South Pasadena Compete
Arcadia USD offers more breadth: 22 AP courses at the high school level, a larger GATE program, newer facilities, and significantly lower home prices at a median of $1.8M. For families who want an A+ district without the $3M+ price tag, Arcadia is the strongest value play in the SGV. South Pasadena, ranked #8 in the state, offers a small-town walkable downtown, strong arts programs, and homes starting near $1.7M. It appeals to families who want an urban-adjacent feel with suburban school performance.
Buyer Perspective
San Marino delivers the highest test scores and the most exclusive educational environment in the region. But Arcadia and South Pasadena deliver 85-90% of the academic results at 50-55% of the home cost. The right choice depends on how much premium you are willing to pay for the last increment of academic performance and the cachet of the San Marino address.
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How San Marino Schools Affect Home Prices
There is no sugarcoating the price of entry. The median home price in San Marino reached approximately $3.3 million to $3.4 million in early 2026, up roughly 5% year over year. Prices range from $2.4 million for smaller homes on modest lots to well over $3.7 million for renovated properties on premium streets. Every single home in San Marino falls within SMUSD boundaries, so there is no "wrong side" of the attendance line.
That consistency is the point. In cities like Arcadia, home prices vary dramatically based on which elementary school zone you land in. In San Marino, the premium is baked into every address equally. You are paying for guaranteed access to a top-6 district in California.
| City | Median Home Price (2026) | Top School District Rank (CA) | Price Per Rank Point |
|---|---|---|---|
| San Marino | $3.3M | #6 | $550K |
| South Pasadena | $1.7M | #8 | $213K |
| Arcadia | $1.8M | ~#10 | $180K |
| Pasadena | $1.3M | Varies by school | N/A |
| Temple City | $1.15M | Top 15% | N/A |
The Value Equation for Families
San Marino is not a value play. It is a premium play. Families who choose San Marino are typically trading a larger home in Arcadia or South Pasadena for a smaller home in a district that consistently produces the highest test scores and college placement rates in the SGV. The median household income in San Marino is $214,167, and 42% of households have children under 18, which means the community is actively family-oriented rather than simply residentially wealthy.
For families who need A+ schools but cannot stretch to a $3M+ purchase, Arcadia ($1.8M median) and South Pasadena ($1.7M median) are the two strongest alternatives. Temple City at $1.15M offers solid schools ranked in the top 15% of California with a price point that is roughly one-third of San Marino.
What Homebuyers Should Know Before Moving to San Marino
Enrollment and Residency Verification
San Marino Unified requires proof of residency for enrollment. The district actively verifies addresses and does not allow inter-district transfers into its schools. If you are buying specifically for school access, make sure the property is fully within San Marino city limits. Some properties near the border with Pasadena or Alhambra may carry a San Marino mailing address but fall in a different school district.
Community Character
San Marino is a residential city by design. There is no commercial district to speak of. Residents shop and dine in neighboring Pasadena, Arcadia, and South Pasadena. The trade-off is quiet, tree-lined streets with large lots, low crime, and a community where nearly every household invests in the school system. Lacy Park, the city's signature green space, requires a resident pass for non-residents on weekdays.
Property Taxes and Mello-Roos
San Marino does not have Mello-Roos assessments, which is uncommon for cities with top-tier schools. Property taxes follow the standard LA County rate of approximately 1.16% of assessed value. On a $3.3M purchase, expect annual property taxes around $38,000. However, since Proposition 13 limits annual assessed value increases to 2%, long-term residents often pay far less than the current market value would suggest.
Market Dynamics
Inventory in San Marino is chronically low. The city has only about 4,000 single-family homes total, and turnover is slow because families tend to stay for the full K-12 cycle. Expect competitive bidding on well-priced listings and a market where homes rarely sit more than 30 days before receiving offers.
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Frequently Asked Questions
What are the best schools in San Marino, CA?
San Marino Unified School District includes four schools: Carver Elementary (K-5, Niche A+, #22 in California), Valentine Elementary (K-5, GreatSchools 9/10, #53 U.S. News), Huntington Middle School (6-8, Niche A+, #14 in CA middle schools), and San Marino High School (9-12, National Blue Ribbon, AP Platinum). Every school ranks in the top 1% of California public schools.
How does San Marino USD rank in California?
San Marino Unified School District ranks #6 Best School District in California and #2 in Los Angeles County according to Niche's 2026 rankings. The district earns an A+ overall grade and places in the top 0.5% of school districts nationally, with 83% math proficiency and 86% reading proficiency on state CAASPP assessments.
What is San Marino High School ranked?
San Marino High School ranks in the top 5% of all California high schools and was named a 2024 National Blue Ribbon School and AP Platinum School. The school offers 16 AP courses and 15 honors courses, with 88% of the Class of 2025 taking at least one AP course. The graduation rate is 98.5% and 77% of graduates enroll in four-year colleges.
How do San Marino schools compare to Arcadia and South Pasadena?
San Marino USD leads in raw test scores with 83% math and 86% reading proficiency. Arcadia USD scores 68% math and 75% reading, while South Pasadena USD ranks #8 statewide. San Marino's smaller district (roughly 3,000 students) delivers more personalized attention, but homes average $3.3M compared to $1.8M in Arcadia and $1.7M in South Pasadena.
What AP courses does San Marino High School offer?
SMHS offers 16 AP courses including Computer Science, Biology, Chemistry, Art, and more, plus 15 honors courses including Calculus, Physics, Drama, and a Caltech STEM Research course. The school earned College Board AP Platinum status, with the average student completing 5.4 AP courses and pass rates increasing every year.
How much do homes cost in San Marino school boundaries?
The median home price in San Marino is approximately $3.3 million to $3.4 million as of early 2026, up roughly 5% year over year. Prices range from $2.4M to over $3.7M depending on lot size, condition, and location. Every home in San Marino falls within SMUSD boundaries, so there is no variation in school assignment.
What is the graduation rate at San Marino High School?
San Marino High School has a 98.5% graduation rate for 2023-2024, compared to the California state average of approximately 87%. Of the Class of 2025, 77% enrolled in four-year colleges, UC acceptance rates increased 64% year over year, and six students were accepted to Ivy League schools.
Is San Marino a good place to raise a family?
San Marino is widely considered one of the best cities in Southern California for families. The city of about 12,000 residents has a median household income of $214,167, a 71% marriage rate among adults, and 42% of households have children under 18. Low crime, quiet residential streets, and a top-6 California school district make it a premier destination, though the $3.3M median home price reflects that premium.
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Justin Borges
Team Lead, The Borges Real Estate Team
DRE #01940318
With over 13 years in Southern California real estate, Justin specializes in probate sales, trust properties, and character homes. His expertise in 1031 exchanges and historic preservation has helped hundreds of clients navigate complex real estate transactions.
