| Index | Herrin | Illinois | National |
| Average Test Scores | 36% | 33% | 48% |
| Student/Teacher ratio | 18:1 | 18:1 | 16:1 |
| Total public schools | 5 | 3,938 | 79,221 |
| Total private schools | 2 | 1,438 | 24,874 |
| Total post-secondary schools | 1 | 306 | 7,963 |
| Index | Herrin | Illinois | National |
| Completed 8th grade | 86.9% | 86.2% | 84.3% |
| Completed high school | 85.1% | 84.7% | 83.0% |
| Completed some college | 62.9% | 61.8% | 59.4% |
| Completed associate degree | 35.1% | 40.7% | 38.5% |
| Completed bachelors | 22.8% | 32.9% | 30.3% |
| Completed masters | 6.7% | 12.7% | 11.5% |
| Completed professional degree | 2.1% | 3.4% | 3.3% |
| Completed doctorate | 0.4% | 1.2% | 1.3% |
There are a total of 5 public schools, 2 private schools and 1 post-secondary schools in Herrin. Using the proficiency score averages, the average test scores for Herrin, IL schools is 36%. The average student to teacher ratio is 18:1. In Herrin, IL, an average of 86.9% of students have completed 8th grade and an average of 85.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Carterville, IL | 6,046 | 53% | 10.9% |
| Creal Springs, IL | 485 | 42% | 12.5% |
| Carbondale, IL | 26,321 | 34% | 29.3% |
| Marion, IL | 18,022 | 33% | 30.9% |
| Du Quoin, IL | 5,883 | 32% | 33.3% |
| Herrin, IL | 13,309 | 36% | 24.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Grass Valley, CA | 13,311 | 47% | 2.7% |
| Coolidge, AZ | 13,315 | 20% | 58.1% |
| Oakland, NJ | 13,303 | 68% | 42.5% |
| Suamico, WI | 13,303 | 65% | 34.4% |
| Cedar Lake, IN | 13,302 | 60% | 25.0% |
| Herrin, IL | 13,309 | 36% | 24.7% |
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