| Index | St. Joseph | Illinois | National |
| Average Test Scores | 52% | 33% | 48% |
| Student/Teacher ratio | 23:1 | 18:1 | 16:1 |
| Total public schools | 3 | 3,938 | 79,221 |
| Total private schools | n/a | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |

| Index | St. Joseph | Illinois | National |
| Completed 8th grade | 98.3% | 86.2% | 84.3% |
| Completed high school | 98.3% | 84.7% | 83.0% |
| Completed some college | 76.3% | 61.8% | 59.4% |
| Completed associate degree | 49.0% | 40.7% | 38.5% |
| Completed bachelors | 34.5% | 32.9% | 30.3% |
| Completed masters | 17.3% | 12.7% | 11.5% |
| Completed professional degree | 3.2% | 3.4% | 3.3% |
| Completed doctorate | 1.1% | 1.2% | 1.3% |
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in St. Joseph. Using the proficiency score averages, the average test scores for St. Joseph, IL schools is 52%. The average student to teacher ratio is 23:1. In St. Joseph, IL, an average of 98.3% of students have completed 8th grade and an average of 98.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Royal, IL | 381 | 65% | 35.4% |
| Savoy, IL | 9,110 | 55% | 14.6% |
| Philo, IL | 1,447 | 50% | 3.1% |
| Thomasboro, IL | 1,071 | 44% | 9.4% |
| Ogden, IL | 790 | 42% | 12.5% |
| St. Joseph, IL | 4,205 | 52% | 7.6% |
| City | Population | Avg. Test Scores | National Avg. |
| Pipestone, MN | 4,205 | 49% | 2.1% |
| Hazlehurst, GA | 4,206 | 40% | 17.4% |
| Beavercreek, OR | 4,202 | 53% | 9.4% |
| Bellaire, OH | 4,202 | 63% | 31.3% |
| Sinking Spring, PA | 4,201 | 61% | 27.5% |
| St. Joseph, IL | 4,205 | 52% | 7.6% |