| Index | Janesville | Iowa | National |
| Average Test Scores | 77% | 69% | 48% |
| Student/Teacher ratio | n/a | 13:1 | 16:1 |
| Total public schools | n/a | 1,101 | 79,221 |
| Total private schools | n/a | 208 | 24,874 |
| Total post-secondary schools | n/a | 96 | 7,963 |
| Index | Janesville | Iowa | National |
| Completed 8th grade | 90.8% | 89.2% | 84.3% |
| Completed high school | 90.3% | 87.7% | 83.0% |
| Completed some college | 51.9% | 59.8% | 59.4% |
| Completed associate degree | 31.4% | 38.4% | 38.5% |
| Completed bachelors | 14.1% | 27.2% | 30.3% |
| Completed masters | 1.7% | 8.7% | 11.5% |
| Completed professional degree | 0.5% | 2.7% | 3.3% |
| Completed doctorate | 0.5% | 1.1% | 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, IA schools is 77%. The average student to teacher ratio is n/a. In Janesville, IA, an average of 90.8% of students have completed 8th grade and an average of 90.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Denver, IA | 1,759 | 90% | 87.2% |
| Readlyn, IA | 804 | 85% | 76.0% |
| Dike, IA | 1,192 | 82% | 70.8% |
| Waverly, IA | 10,172 | 81% | 68.3% |
| Hudson, IA | 2,409 | 81% | 68.2% |
| Janesville, IA | 1,051 | 77% | 60.4% |
| City | Population | Avg. Test Scores | National Avg. |
| Ashley, IN | 1,051 | 47% | 2.1% |
| Mineral Springs, AR | 1,051 | 25% | 49.0% |
| Argenta, IL | 1,051 | 21% | 56.8% |
| Hydesville, CA | 1,051 | 50% | 3.1% |
| Liberty Center, OH | 1,051 | 76% | 57.6% |
| Janesville, IA | 1,051 | 77% | 60.4% |
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