| 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 |
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| 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 | 370 | 65% | 35.4% |
| Savoy, IL | 8,802 | 55% | 14.6% |
| St. Joseph, IL | 4,053 | 52% | 7.6% |
| Philo, IL | 1,398 | 50% | 3.1% |
| Ogden, IL | 773 | 42% | 12.5% |
| Sidney, IL | 1,297 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Black Rock, NM | 1,298 | 10% | 79.7% |
| Clinton, KY | 1,296 | 53% | 9.9% |
| Newberry, MI | 1,298 | 33% | 32.3% |
| Larimore, ND | 1,298 | 46% | 4.7% |
| Tennessee Ridge, TN | 1,296 | 27% | 43.8% |
| Sidney, IL | 1,297 | n/a |
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