| Index | St. John | Indiana | National |
| Average Test Scores | 64% | 46% | 48% |
| Student/Teacher ratio | 21:1 | 22:1 | 16:1 |
| Total public schools | 2 | 1,755 | 79,221 |
| Total private schools | 1 | 675 | 24,874 |
| Total post-secondary schools | n/a | 141 | 7,963 |
| Index | St. John | Indiana | National |
| Completed 8th grade | 96.2% | 84.6% | 84.3% |
| Completed high school | 95.6% | 82.9% | 83.0% |
| Completed some college | 68.2% | 53.8% | 59.4% |
| Completed associate degree | 48.3% | 33.0% | 38.5% |
| Completed bachelors | 35.4% | 24.6% | 30.3% |
| Completed masters | 11.1% | 8.9% | 11.5% |
| Completed professional degree | 1.4% | 2.4% | 3.3% |
| Completed doctorate | 0.4% | 1.0% | 1.3% |
There are a total of 2 public schools, 1 private schools and n/a post-secondary schools in St. John. Using the proficiency score averages, the average test scores for St. John, IN schools is 64%. The average student to teacher ratio is 21:1. In St. John, IN, an average of 96.2% of students have completed 8th grade and an average of 95.6% 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% |
| Schererville, IN | 28,559 | 63% | 30.2% |
| Cedar Lake, IN | 12,830 | 60% | 25.0% |
| St. John, IN | 18,382 | 64% | 32.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Rutherford, NJ | 18,376 | 60% | 24.2% |
| Cameron Park, CA | 18,370 | 59% | 23.7% |
| Hopkins, MN | 18,400 | 54% | 11.7% |
| Laurel, MS | 18,403 | 40% | 17.4% |
| Springboro, OH | 18,416 | 82% | 70.3% |
| St. John, IN | 18,382 | 64% | 32.3% |
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