| Index | Petersburg | Illinois | National |
| Average Test Scores | 32% | 33% | 48% |
| Student/Teacher ratio | 19:1 | 18:1 | 16:1 |
| Total public schools | 4 | 3,938 | 79,221 |
| Total private schools | n/a | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Petersburg | Illinois | National |
| Completed 8th grade | 80.7% | 86.2% | 84.3% |
| Completed high school | 77.5% | 84.7% | 83.0% |
| Completed some college | 51.6% | 61.8% | 59.4% |
| Completed associate degree | 28.2% | 40.7% | 38.5% |
| Completed bachelors | 18.1% | 32.9% | 30.3% |
| Completed masters | 5.6% | 12.7% | 11.5% |
| Completed professional degree | 1.4% | 3.4% | 3.3% |
| Completed doctorate | 0.6% | 1.2% | 1.3% |
There are a total of 4 public schools, n/a private schools and n/a post-secondary schools in Petersburg. Using the proficiency score averages, the average test scores for Petersburg, IL schools is 32%. The average student to teacher ratio is 19:1. In Petersburg, IL, an average of 80.7% of students have completed 8th grade and an average of 77.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Sherman, IL | 4,470 | 67% | 38.5% |
| Cantrall, IL | 104 | 45% | 6.3% |
| Pleasant Plains, IL | 718 | 38% | 20.1% |
| Athens, IL | 2,349 | 37% | 22.9% |
| Mason City, IL | 2,342 | 26% | 46.9% |
| Petersburg, IL | 2,564 | 32% | 33.9% |
| City | Population | Avg. Test Scores | National Avg. |
| Premont, TX | 2,564 | 27% | 44.3% |
| Glenwood, MN | 2,563 | 63% | 31.8% |
| Cape Neddick, ME | 2,563 | 65% | 34.4% |
| Pembroke, GA | 2,565 | 35% | 26.4% |
| Rhinebeck, NY | 2,565 | 68% | 41.3% |
| Petersburg, IL | 2,564 | 32% | 33.9% |
Here are the best places to live in Illinois
These are the 10 cheapest cities in Illinois
Check out the 10 most dangerous cities in Illinois
Most Dangerous States In The US