| Index | Brussels | Illinois | National |
| Average Test Scores | 37% | 31% | 49% |
| 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 | Brussels | Illinois | National |
| Completed 8th grade | 78.4% | 86.2% | 84.3% |
| Completed high school | 75.3% | 84.7% | 83.0% |
| Completed some college | 44.3% | 61.8% | 59.4% |
| Completed associate degree | 12.4% | 40.7% | 38.5% |
| Completed bachelors | 8.2% | 32.9% | 30.3% |
| Completed masters | 3.1% | 12.7% | 11.5% |
| Completed professional degree | 1.0% | 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 Brussels. Using the proficiency score averages, the average test scores for Brussels, IL schools is 37%. The average student to teacher ratio is n/a. In Brussels, IL, an average of 78.4% of students have completed 8th grade and an average of 75.3% have completed high school.
| City, State | Population | Avg. Test Scores | National Avg. |
| Lake St. Louis, MO | 15,150 | 71% | 44% |
| Cottleville, MO | 4,205 | 70% | 41% |
| St. Peters, MO | 55,820 | 67% | 37% |
| O'Fallon, MO | 84,018 | 65% | 32% |
| Dardenne Prairie, MO | 12,692 | 64% | 30% |
| Brussels, IL | 123 | 37% | 24% |
| City, State | Population | Avg. Test Scores | National Avg. |
| Datil, NM | 123 | 0% | 100% |
| Raymond, NE | 123 | 82% | 67% |
| Charles City, VA | 123 | 78% | 59% |
| Alexandria, MO | 122 | 55% | 11% |
| Adak, AK | 122 | 50% | 2% |
| Brussels, IL | 123 | 37% | 24% |
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