Schools in Zip Code 91108

Zip code 91108 has four schools in San Marino Unified: two elementary schools, a middle school and a high school serving kindergarten through grade 12, with 3,083 students combined. Across the schools, the unweighted average 2025–26 proficiency was 86% in ELA, 87% in math and 76% in science, compared with California’s 49%, 38% and 36%. The schools’ average results were 37 percentage points higher in ELA, 49 points higher in math and 40 points higher in science. Because schools serve different grades, their All Grades averages are not direct, like-for-like comparisons. The clearest area-wide finding is that results are especially strong relative to the state in math.

San Marino High leads the All Grades results in ELA at 89% and science at 80%; the lowest reported results in those subjects are 83% at Huntington Middle in ELA and 70% at Valentine Elementary in science—a 6-point and 10-point spread. Valentine leads All Grades math at 88%, 3 points above San Marino High at 86%. In matched grade comparisons, Huntington’s grade 7 math result is 90%, 53 points above the state. Among the elementary schools, Carver Elementary leads Valentine in grade 5 ELA by 7 points and science by 6, while Valentine leads in math by about 1 point in each of grades 3–5.

Results changed unevenly from 2024–25 to 2025–26: San Marino High improved in all three subjects, by 5 points in ELA, 8 in math and 9 in science, while Valentine’s science fell 11 points even as its math rose 4. Across the schools, average math improved by 3 points; average ELA and science were essentially flat. SchoolDigger ranks all four near the top statewide, in the 98th or 99th percentile, though each rank number worsened between 2023–24 and 2025–26. Student–teacher ratios range from 20.4 to 23.0, averaging 21.5. The schools report free/reduced lunch eligible figures for 2024–25; Carver is at 10.8%, Valentine at 11.3% and Huntington at 14.4%. These figures offer context, not an explanation for differences in results.