| Index | Sumner | Illinois | National |
| Average Test Scores | 45% | 33% | 48% |
| Student/Teacher ratio | 12:1 | 18:1 | 16:1 |
| Total public schools | 3 | 3,938 | 79,221 |
| Total private schools | n/a | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Sumner | Illinois | National |
| Completed 8th grade | 44.0% | 86.2% | 84.3% |
| Completed high school | 40.8% | 84.7% | 83.0% |
| Completed some college | 30.5% | 61.8% | 59.4% |
| Completed associate degree | 8.5% | 40.7% | 38.5% |
| Completed bachelors | 2.9% | 32.9% | 30.3% |
| Completed masters | 0.7% | 12.7% | 11.5% |
| Completed professional degree | 0.1% | 3.4% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in Sumner. Using the proficiency score averages, the average test scores for Sumner, IL schools is 45%. The average student to teacher ratio is 12:1. In Sumner, IL, an average of 44.0% of students have completed 8th grade and an average of 40.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| West Salem, IL | 872 | 52% | 8.3% |
| Allendale, IL | 655 | 42% | 12.5% |
| Bridgeport, IL | 1,919 | 33% | 30.7% |
| Olney, IL | 8,872 | 29% | 40.6% |
| Lawrenceville, IL | 4,365 | 23% | 52.1% |
| Sumner, IL | 2,916 | 45% | 7.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Castle Rock, WA | 2,917 | 46% | 5.2% |
| Seaside Heights, NJ | 2,917 | 22% | 54.2% |
| Chaffee, MO | 2,917 | 31% | 35.9% |
| East Norwich, NY | 2,913 | 67% | 39.6% |
| Marshall, VA | 2,913 | 75% | 55.9% |
| Sumner, IL | 2,916 | 45% | 7.3% |
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