| Index | San Carlos | California | National |
| Average Test Scores | 78% | 43% | 48% |
| Student/Teacher ratio | 21:1 | 20:1 | 16:1 |
| Total public schools | 10 | 8,308 | 79,221 |
| Total private schools | 4 | 3,438 | 24,874 |
| Total post-secondary schools | n/a | 1,085 | 7,963 |
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| Index | San Carlos | California | National |
| Completed 8th grade | 96.4% | 81.1% | 84.3% |
| Completed high school | 96.3% | 79.8% | 83.0% |
| Completed some college | 87.3% | 61.5% | 59.4% |
| Completed associate degree | 70.9% | 39.8% | 38.5% |
| Completed bachelors | 63.6% | 32.0% | 30.3% |
| Completed masters | 29.1% | 11.9% | 11.5% |
| Completed professional degree | 10.6% | 3.9% | 3.3% |
| Completed doctorate | 4.9% | 1.6% | 1.3% |
There are a total of 10 public schools, 4 private schools and n/a post-secondary schools in San Carlos. Using the proficiency score averages, the average test scores for San Carlos, CA schools is 78%. The average student to teacher ratio is 21:1. In San Carlos, CA, an average of 96.4% of students have completed 8th grade and an average of 96.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Los Altos Hills, CA | 8,670 | 87% | 81.3% |
| Portola Valley, CA | 4,678 | 86% | 79.2% |
| Hillsborough, CA | 11,923 | 86% | 78.4% |
| Los Altos, CA | 31,735 | 86% | 78.3% |
| Cupertino, CA | 61,240 | 85% | 77.8% |
| San Carlos, CA | 30,787 | 78% | 62.4% |
| City | Population | Avg. Test Scores | National Avg. |
| Morristown, TN | 30,738 | 36% | 24.7% |
| Rahway, NJ | 30,734 | 35% | 27.1% |
| Cornelius, NC | 30,849 | 60% | 25.8% |
| Duluth, GA | 30,718 | 61% | 27.5% |
| North Chicago, IL | 30,865 | 14% | 70.7% |
| San Carlos, CA | 30,787 | 78% | 62.4% |
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