| Index | San Marino | California | National |
| Average Test Scores | 88% | 43% | 48% |
| Student/Teacher ratio | 21:1 | 20:1 | 16:1 |
| Total public schools | 4 | 8,308 | 79,221 |
| Total private schools | 3 | 3,438 | 24,874 |
| Total post-secondary schools | n/a | 1,085 | 7,963 |
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| Index | San Marino | California | National |
| Completed 8th grade | 95.2% | 81.1% | 84.3% |
| Completed high school | 95.0% | 79.8% | 83.0% |
| Completed some college | 88.7% | 61.5% | 59.4% |
| Completed associate degree | 75.4% | 39.8% | 38.5% |
| Completed bachelors | 71.7% | 32.0% | 30.3% |
| Completed masters | 39.3% | 11.9% | 11.5% |
| Completed professional degree | 19.5% | 3.9% | 3.3% |
| Completed doctorate | 6.1% | 1.6% | 1.3% |
There are a total of 4 public schools, 3 private schools and n/a post-secondary schools in San Marino. Using the proficiency score averages, the average test scores for San Marino, CA schools is 88%. The average student to teacher ratio is 21:1. In San Marino, CA, an average of 95.2% of students have completed 8th grade and an average of 95.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| La Cañada Flintridge, CA | 20,078 | 87% | 82.0% |
| South Pasadena, CA | 25,478 | 82% | 70.2% |
| Arcadia, CA | 57,053 | 74% | 53.2% |
| La Crescenta-Montrose, CA | 20,171 | 72% | 49.2% |
| Walnut, CA | 29,764 | 70% | 44.9% |
| San Marino, CA | 13,020 | 88% | 84.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Coolidge, AZ | 13,016 | 20% | 58.1% |
| Red Oak, TX | 13,010 | 48% | 0.9% |
| Dunmore, PA | 13,008 | 56% | 16.7% |
| Butler, PA | 13,008 | 61% | 27.3% |
| Avenal, CA | 13,033 | 26% | 45.6% |
| San Marino, CA | 13,020 | 88% | 84.1% |
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