| Index | Sidney | 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 | Sidney | Illinois | National |
| Completed 8th grade | 91.6% | 86.2% | 84.3% |
| Completed high school | 90.2% | 84.7% | 83.0% |
| Completed some college | 63.3% | 61.8% | 59.4% |
| Completed associate degree | 38.8% | 40.7% | 38.5% |
| Completed bachelors | 20.3% | 32.9% | 30.3% |
| Completed masters | 5.3% | 12.7% | 11.5% |
| Completed professional degree | 2.5% | 3.4% | 3.3% |
| Completed doctorate | 1.8% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Sidney. Using the proficiency score averages, the average test scores for Sidney, IL schools is n/a. The average student to teacher ratio is n/a. In Sidney, IL, an average of 91.6% of students have completed 8th grade and an average of 90.2% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Royal, IL | 381 | 65% | 35.4% |
| Savoy, IL | 9,110 | 55% | 14.6% |
| St. Joseph, IL | 4,205 | 52% | 7.6% |
| Philo, IL | 1,447 | 50% | 3.1% |
| Ogden, IL | 790 | 42% | 12.5% |
| Sidney, IL | 1,347 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Marcus, IA | 1,347 | 76% | 58.3% |
| Hastings, FL | 1,347 | 20% | 58.3% |
| Duncannon, PA | 1,347 | 55% | 13.9% |
| Eastport, ME | 1,348 | 33% | 32.3% |
| Paisley, FL | 1,346 | 49% | 1.0% |
| Sidney, IL | 1,347 | n/a |
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