| Index | Thornton | Illinois | National |
| Average Test Scores | 30% | 33% | 48% |
| Student/Teacher ratio | 14:1 | 18:1 | 16:1 |
| Total public schools | 1 | 3,938 | 79,221 |
| Total private schools | n/a | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Thornton | Illinois | National |
| Completed 8th grade | 85.5% | 86.2% | 84.3% |
| Completed high school | 84.4% | 84.7% | 83.0% |
| Completed some college | 41.6% | 61.8% | 59.4% |
| Completed associate degree | 15.8% | 40.7% | 38.5% |
| Completed bachelors | 10.1% | 32.9% | 30.3% |
| Completed masters | 2.5% | 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 1 public schools, n/a private schools and n/a post-secondary schools in Thornton. Using the proficiency score averages, the average test scores for Thornton, IL schools is 30%. The average student to teacher ratio is 14:1. In Thornton, IL, an average of 85.5% of students have completed 8th grade and an average of 84.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Munster, IN | 22,604 | 70% | 46.0% |
| Crown Point, IN | 30,372 | 68% | 42.6% |
| Dyer, IN | 15,933 | 64% | 33.3% |
| St. John, IN | 18,382 | 64% | 32.3% |
| Hickory Hills, IL | 14,253 | 63% | 30.2% |
| Thornton, IL | 2,308 | 30% | 38.5% |
| City | Population | Avg. Test Scores | National Avg. |
| Council Grove, KS | 2,307 | 38% | 20.3% |
| Ashville, AL | 2,309 | 48% | 0.7% |
| Saltville, VA | 2,307 | 87% | 81.3% |
| Brogden, NC | 2,306 | 17% | 64.6% |
| Surgoinsville, TN | 2,306 | 38% | 20.3% |
| Thornton, IL | 2,308 | 30% | 38.5% |
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