| Index | Olney | Illinois | National |
| Average Test Scores | 29% | 33% | 48% |
| Student/Teacher ratio | 29:1 | 18:1 | 16:1 |
| Total public schools | 6 | 3,938 | 79,221 |
| Total private schools | 1 | 1,438 | 24,874 |
| Total post-secondary schools | 2 | 306 | 7,963 |
| Index | Olney | Illinois | National |
| Completed 8th grade | 81.4% | 86.2% | 84.3% |
| Completed high school | 78.3% | 84.7% | 83.0% |
| Completed some college | 54.5% | 61.8% | 59.4% |
| Completed associate degree | 33.5% | 40.7% | 38.5% |
| Completed bachelors | 23.1% | 32.9% | 30.3% |
| Completed masters | 6.4% | 12.7% | 11.5% |
| Completed professional degree | 0.8% | 3.4% | 3.3% |
| Completed doctorate | 0.3% | 1.2% | 1.3% |
There are a total of 6 public schools, 1 private schools and 2 post-secondary schools in Olney. Using the proficiency score averages, the average test scores for Olney, IL schools is 29%. The average student to teacher ratio is 29:1. In Olney, IL, an average of 81.4% of students have completed 8th grade and an average of 78.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| West Salem, IL | 872 | 52% | 8.3% |
| Sumner, IL | 2,916 | 45% | 7.3% |
| Mount Erie, IL | 114 | 40% | 16.7% |
| Clay City, IL | 896 | 26% | 45.1% |
| Olney, IL | 8,872 | 29% | 40.6% |
| City | Population | Avg. Test Scores | National Avg. |
| Toppenish, WA | 8,872 | 28% | 42.4% |
| Farmingdale, NY | 8,869 | 53% | 11.0% |
| Newark, NY | 8,868 | 44% | 7.6% |
| South Amboy, NJ | 8,868 | 39% | 18.2% |
| Poteau, OK | 8,866 | 33% | 31.3% |
| Olney, IL | 8,872 | 29% | 40.6% |
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