| Index | Dorchester | 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 | Dorchester | Illinois | National |
| Completed 8th grade | 87.4% | 86.2% | 84.3% |
| Completed high school | 87.4% | 84.7% | 83.0% |
| Completed some college | 39.6% | 61.8% | 59.4% |
| Completed associate degree | 16.2% | 40.7% | 38.5% |
| Completed bachelors | 9.9% | 32.9% | 30.3% |
| Completed masters | 3.6% | 12.7% | 11.5% |
| Completed professional degree | 0.9% | 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 Dorchester. Using the proficiency score averages, the average test scores for Dorchester, IL schools is n/a. The average student to teacher ratio is n/a. In Dorchester, IL, an average of 87.4% of students have completed 8th grade and an average of 87.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Worden, IL | 875 | 57% | 18.8% |
| Alhambra, IL | 676 | 55% | 14.6% |
| Carlinville, IL | 5,645 | 45% | 7.0% |
| Shipman, IL | 616 | 37% | 22.9% |
| Mount Olive, IL | 2,052 | 34% | 30.2% |
| Dorchester, IL | 151 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Custer, MT | 151 | 30% | 37.5% |
| Edgar Springs, MO | 151 | 62% | 29.2% |
| Renick, MO | 151 | 40% | 17.7% |
| Cedar Grove, IN | 151 | 60% | 24.0% |
| Kobuk, AK | 151 | 20% | 58.3% |
| Dorchester, IL | 151 | n/a |
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