| Index | San Gabriel | California | National |
| Average Test Scores | 54% | 43% | 48% |
| Student/Teacher ratio | 21:1 | 20:1 | 16:1 |
| Total public schools | 12 | 8,308 | 79,221 |
| Total private schools | 11 | 3,438 | 24,874 |
| Total post-secondary schools | n/a | 1,085 | 7,963 |
| Index | San Gabriel | California | National |
| Completed 8th grade | 78.5% | 81.1% | 84.3% |
| Completed high school | 77.4% | 79.8% | 83.0% |
| Completed some college | 53.1% | 61.5% | 59.4% |
| Completed associate degree | 37.2% | 39.8% | 38.5% |
| Completed bachelors | 30.9% | 32.0% | 30.3% |
| Completed masters | 7.3% | 11.9% | 11.5% |
| Completed professional degree | 3.0% | 3.9% | 3.3% |
| Completed doctorate | 1.2% | 1.6% | 1.3% |
There are a total of 12 public schools, 11 private schools and n/a post-secondary schools in San Gabriel. Using the proficiency score averages, the average test scores for San Gabriel, CA schools is 54%. The average student to teacher ratio is 21:1. In San Gabriel, CA, an average of 78.5% of students have completed 8th grade and an average of 77.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| San Marino, CA | 13,020 | 88% | 84.1% |
| 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% |
| San Gabriel, CA | 40,108 | 54% | 13.5% |
| City | Population | Avg. Test Scores | National Avg. |
| Quincy, IL | 40,111 | 28% | 41.8% |
| Cape Girardeau, MO | 40,100 | 42% | 11.6% |
| Hollister, CA | 40,100 | 46% | 5.1% |
| Spanish Fork, UT | 40,069 | 45% | 6.5% |
| Holyoke, MA | 40,161 | 21% | 56.8% |
| San Gabriel, CA | 40,108 | 54% | 13.5% |
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