| Index | Centralia | Illinois | National |
| Average Test Scores | 24% | 33% | 48% |
| Student/Teacher ratio | 17:1 | 18:1 | 16:1 |
| Total public schools | 19 | 3,938 | 79,221 |
| Total private schools | 3 | 1,438 | 24,874 |
| Total post-secondary schools | 1 | 306 | 7,963 |
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| Index | Centralia | Illinois | National |
| Completed 8th grade | 85.2% | 86.2% | 84.3% |
| Completed high school | 82.5% | 84.7% | 83.0% |
| Completed some college | 55.4% | 61.8% | 59.4% |
| Completed associate degree | 29.1% | 40.7% | 38.5% |
| Completed bachelors | 15.8% | 32.9% | 30.3% |
| Completed masters | 5.6% | 12.7% | 11.5% |
| Completed professional degree | 0.8% | 3.4% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of 19 public schools, 3 private schools and 1 post-secondary schools in Centralia. Using the proficiency score averages, the average test scores for Centralia, IL schools is 24%. The average student to teacher ratio is 17:1. In Centralia, IL, an average of 85.2% of students have completed 8th grade and an average of 82.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Salem, IL | 6,988 | 42% | 12.8% |
| Carlyle, IL | 3,595 | 38% | 20.8% |
| Woodlawn, IL | 555 | 36% | 26.0% |
| Irvington, IL | 588 | 35% | 27.1% |
| Odin, IL | 999 | 34% | 30.2% |
| Centralia, IL | 12,354 | 24% | 49.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Grenada, MS | 12,349 | 56% | 17.4% |
| Winnetka, IL | 12,361 | 73% | 52.3% |
| Urbana, MD | 12,362 | 79% | 64.6% |
| Larkspur, CA | 12,363 | 53% | 9.4% |
| Fairfax Station, VA | 12,364 | 82% | 71.5% |
| Centralia, IL | 12,354 | 24% | 49.3% |
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