| Index | Janesville | California | National |
| Average Test Scores | 34% | 43% | 48% |
| Student/Teacher ratio | n/a | 20:1 | 16:1 |
| Total public schools | n/a | 8,308 | 79,221 |
| Total private schools | n/a | 3,438 | 24,874 |
| Total post-secondary schools | n/a | 1,085 | 7,963 |
| Index | Janesville | California | National |
| Completed 8th grade | 91.3% | 81.1% | 84.3% |
| Completed high school | 90.5% | 79.8% | 83.0% |
| Completed some college | 77.8% | 61.5% | 59.4% |
| Completed associate degree | 35.4% | 39.8% | 38.5% |
| Completed bachelors | 22.1% | 32.0% | 30.3% |
| Completed masters | 11.8% | 11.9% | 11.5% |
| Completed professional degree | 4.8% | 3.9% | 3.3% |
| Completed doctorate | 0.0% | 1.6% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Janesville. Using the proficiency score averages, the average test scores for Janesville, CA schools is 34%. The average student to teacher ratio is n/a. In Janesville, CA, an average of 91.3% of students have completed 8th grade and an average of 90.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Susanville, CA | 14,922 | 40% | 17.5% |
| Litchfield, CA | 183 | 35% | 28.1% |
| Janesville, CA | 2,803 | 34% | 30.2% |
| City | Population | Avg. Test Scores | National Avg. |
| Osage City, KS | 2,804 | 35% | 26.4% |
| Almont, MI | 2,802 | 59% | 22.6% |
| Magnolia, TX | 2,802 | 46% | 4.9% |
| Moose Lake, MN | 2,804 | 56% | 15.6% |
| Bloomingdale, GA | 2,801 | 29% | 40.1% |
| Janesville, CA | 2,803 | 34% | 30.2% |
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