| Index | Ottawa | Illinois | National |
| Average Test Scores | 33% | 33% | 48% |
| Student/Teacher ratio | 17:1 | 18:1 | 16:1 |
| Total public schools | 11 | 3,938 | 79,221 |
| Total private schools | 3 | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Ottawa | Illinois | National |
| Completed 8th grade | 84.2% | 86.2% | 84.3% |
| Completed high school | 82.8% | 84.7% | 83.0% |
| Completed some college | 52.9% | 61.8% | 59.4% |
| Completed associate degree | 29.1% | 40.7% | 38.5% |
| Completed bachelors | 18.9% | 32.9% | 30.3% |
| Completed masters | 6.8% | 12.7% | 11.5% |
| Completed professional degree | 2.4% | 3.4% | 3.3% |
| Completed doctorate | 0.6% | 1.2% | 1.3% |
There are a total of 11 public schools, 3 private schools and n/a post-secondary schools in Ottawa. Using the proficiency score averages, the average test scores for Ottawa, IL schools is 33%. The average student to teacher ratio is 17:1. In Ottawa, IL, an average of 84.2% of students have completed 8th grade and an average of 82.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Newark, IL | 1,376 | 50% | 3.5% |
| Grand Ridge, IL | 670 | 50% | 3.1% |
| Sheridan, IL | 2,894 | 40% | 16.7% |
| Seneca, IL | 2,603 | 40% | 17.4% |
| Mendota, IL | 7,151 | 33% | 31.9% |
| Ottawa, IL | 19,177 | 33% | 32.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Winthrop Town, MA | 19,172 | 58% | 20.5% |
| Creve Coeur, MO | 19,159 | 56% | 17.4% |
| Altus, OK | 19,157 | 42% | 13.3% |
| Twinsburg, OH | 19,149 | 83% | 73.4% |
| Augusta, ME | 19,148 | 40% | 17.0% |
| Ottawa, IL | 19,177 | 33% | 32.3% |
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