| Index | Mason | 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 |
| Index | Mason | Illinois | National |
| Completed 8th grade | 74.9% | 86.2% | 84.3% |
| Completed high school | 69.0% | 84.7% | 83.0% |
| Completed some college | 26.4% | 61.8% | 59.4% |
| Completed associate degree | 9.2% | 40.7% | 38.5% |
| Completed bachelors | 2.9% | 32.9% | 30.3% |
| Completed masters | 0.0% | 12.7% | 11.5% |
| Completed professional degree | 0.0% | 3.4% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Mason. Using the proficiency score averages, the average test scores for Mason, IL schools is n/a. The average student to teacher ratio is n/a. In Mason, IL, an average of 74.9% of students have completed 8th grade and an average of 69.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Teutopolis, IL | 1,807 | 62% | 28.1% |
| Dieterich, IL | 726 | 53% | 10.9% |
| Effingham, IL | 12,310 | 29% | 39.6% |
| St. Elmo, IL | 1,466 | 29% | 39.9% |
| Altamont, IL | 2,231 | 26% | 46.9% |
| Mason, IL | 243 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Koyuk, AK | 243 | 10% | 79.2% |
| McNeal, AZ | 243 | 40% | 16.7% |
| Hornbrook, CA | 243 | 30% | 37.5% |
| Prairie Home, MO | 243 | 40% | 16.7% |
| Seneca, OR | 242 | 50% | 4.2% |
| Mason, IL | 243 | n/a |
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