| Index | St. Peter | 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 | St. Peter | Illinois | National |
| Completed 8th grade | 93.5% | 86.2% | 84.3% |
| Completed high school | 89.1% | 84.7% | 83.0% |
| Completed some college | 47.3% | 61.8% | 59.4% |
| Completed associate degree | 33.5% | 40.7% | 38.5% |
| Completed bachelors | 14.2% | 32.9% | 30.3% |
| Completed masters | 3.3% | 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 St. Peter. Using the proficiency score averages, the average test scores for St. Peter, IL schools is n/a. The average student to teacher ratio is n/a. In St. Peter, IL, an average of 93.5% of students have completed 8th grade and an average of 89.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Brownstown, IL | 839 | 29% | 39.6% |
| Patoka, IL | 585 | 29% | 39.6% |
| St. Elmo, IL | 1,466 | 29% | 39.9% |
| Vandalia, IL | 6,615 | 27% | 44.4% |
| Altamont, IL | 2,231 | 26% | 46.9% |
| St. Peter, IL | 438 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Ropesville, TX | 438 | 49% | 2.1% |
| Alleman, IA | 438 | 85% | 77.8% |
| Bartley, NE | 438 | 42% | 12.5% |
| Moreland, GA | 438 | 55% | 13.5% |
| Lake City, CO | 438 | 40% | 16.7% |
| St. Peter, IL | 438 | n/a |
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