| Index | Maryville | Illinois | National |
| Average Test Scores | 65% | 33% | 48% |
| Student/Teacher ratio | 19:1 | 18:1 | 16:1 |
| Total public schools | 1 | 3,938 | 79,221 |
| Total private schools | 2 | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |

| Index | Maryville | Illinois | National |
| Completed 8th grade | 95.9% | 86.2% | 84.3% |
| Completed high school | 95.2% | 84.7% | 83.0% |
| Completed some college | 72.5% | 61.8% | 59.4% |
| Completed associate degree | 51.2% | 40.7% | 38.5% |
| Completed bachelors | 42.3% | 32.9% | 30.3% |
| Completed masters | 16.0% | 12.7% | 11.5% |
| Completed professional degree | 3.1% | 3.4% | 3.3% |
| Completed doctorate | 2.3% | 1.2% | 1.3% |
There are a total of 1 public schools, 2 private schools and n/a post-secondary schools in Maryville. Using the proficiency score averages, the average test scores for Maryville, IL schools is 65%. The average student to teacher ratio is 19:1. In Maryville, IL, an average of 95.9% of students have completed 8th grade and an average of 95.2% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| St. Jacob, IL | 1,590 | 67% | 39.6% |
| Glen Carbon, IL | 12,963 | 57% | 18.8% |
| Worden, IL | 908 | 57% | 18.8% |
| Alhambra, IL | 702 | 55% | 14.6% |
| Marine, IL | 1,017 | 55% | 13.5% |
| Maryville, IL | 8,220 | 65% | 34.4% |
| City | Population | Avg. Test Scores | National Avg. |
| Sutherlin, OR | 8,222 | 47% | 1.9% |
| Caldwell, NJ | 8,222 | 64% | 32.3% |
| Skiatook, OK | 8,217 | 41% | 14.1% |
| Blandon, PA | 8,216 | 62% | 29.2% |
| Wyoming, MN | 8,226 | 60% | 24.5% |
| Maryville, IL | 8,220 | 65% | 34.4% |