| Index | Sibley | Illinois | National |
| Average Test Scores | n/a | 33% | 48% |
| Student/Teacher ratio | n/a | 18:1 | 16:1 |
| Total public schools | n/a | 3,938 | 79,221 |
| Total private schools | n/a | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Sibley | Illinois | National |
| Completed 8th grade | 83.5% | 86.2% | 84.3% |
| Completed high school | 83.5% | 84.7% | 83.0% |
| Completed some college | 40.7% | 61.8% | 59.4% |
| Completed associate degree | 12.3% | 40.7% | 38.5% |
| Completed bachelors | 8.6% | 32.9% | 30.3% |
| Completed masters | 0.4% | 12.7% | 11.5% |
| Completed professional degree | 0.4% | 3.4% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Sibley. Using the proficiency score averages, the average test scores for Sibley, IL schools is n/a. The average student to teacher ratio is n/a. In Sibley, IL, an average of 83.5% of students have completed 8th grade and an average of 83.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Forrest, IL | 995 | 46% | 3.6% |
| Gibson City, IL | 3,340 | 44% | 8.0% |
| Piper City, IL | 855 | 42% | 12.5% |
| Fairbury, IL | 3,604 | 39% | 18.2% |
| Paxton, IL | 4,076 | 37% | 22.6% |
| Sibley, IL | 223 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Wakarusa, KS | 223 | 30% | 38.5% |
| De Tour Village, MI | 223 | 48% | 1.0% |
| Wales, AK | 222 | 20% | 58.3% |
| Rudyard, MT | 224 | 47% | 2.8% |
| Newtok, AK | 222 | 10% | 79.2% |
| Sibley, IL | 223 | n/a |
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