| Index | Grayville | Illinois | National |
| Average Test Scores | 22% | 33% | 48% |
| Student/Teacher ratio | 15:1 | 18:1 | 16:1 |
| Total public schools | 2 | 3,938 | 79,221 |
| Total private schools | n/a | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Grayville | Illinois | National |
| Completed 8th grade | 84.3% | 86.2% | 84.3% |
| Completed high school | 81.5% | 84.7% | 83.0% |
| Completed some college | 50.8% | 61.8% | 59.4% |
| Completed associate degree | 26.4% | 40.7% | 38.5% |
| Completed bachelors | 8.9% | 32.9% | 30.3% |
| Completed masters | 1.9% | 12.7% | 11.5% |
| Completed professional degree | 0.5% | 3.4% | 3.3% |
| Completed doctorate | 0.2% | 1.2% | 1.3% |
There are a total of 2 public schools, n/a private schools and n/a post-secondary schools in Grayville. Using the proficiency score averages, the average test scores for Grayville, IL schools is 22%. The average student to teacher ratio is 15:1. In Grayville, IL, an average of 84.3% of students have completed 8th grade and an average of 81.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Poseyville, IN | 1,010 | 59% | 23.3% |
| Mount Carmel, IL | 6,922 | 34% | 30.2% |
| Carmi, IL | 4,865 | 33% | 30.4% |
| Albion, IL | 2,215 | 33% | 30.7% |
| Grayville, IL | 1,579 | 22% | 53.6% |
| City | Population | Avg. Test Scores | National Avg. |
| Neoga, IL | 1,579 | 26% | 46.4% |
| Leadwood, MO | 1,579 | 45% | 6.3% |
| Towanda, KS | 1,579 | 37% | 22.9% |
| Bellwood, PA | 1,578 | 62% | 28.5% |
| Weber City, VA | 1,580 | 94% | 94.8% |
| Grayville, IL | 1,579 | 22% | 53.6% |
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