| Index | Gary | South Dakota | National |
| Average Test Scores | n/a | 48% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 340 | 79,221 |
| Total private schools | n/a | 76 | 24,874 |
| Total post-secondary schools | n/a | 25 | 7,963 |
| Index | Gary | South Dakota | National |
| Completed 8th grade | 82.1% | 89.1% | 84.3% |
| Completed high school | 82.1% | 86.8% | 83.0% |
| Completed some college | 31.8% | 60.4% | 59.4% |
| Completed associate degree | 15.9% | 38.5% | 38.5% |
| Completed bachelors | 13.9% | 27.5% | 30.3% |
| Completed masters | 1.5% | 8.1% | 11.5% |
| Completed professional degree | 0.5% | 2.5% | 3.3% |
| Completed doctorate | 0.5% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Gary. Using the proficiency score averages, the average test scores for Gary, SD schools is n/a. The average student to teacher ratio is n/a. In Gary, SD, an average of 82.1% of students have completed 8th grade and an average of 82.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Canby, MN | 1,558 | 63% | 31.8% |
| Clear Lake, SD | 1,503 | 42% | 12.2% |
| Gary, SD | 284 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Fayetteville, OH | 284 | 59% | 22.2% |
| Moscow, KS | 284 | 26% | 45.3% |
| Augusta, MO | 284 | 57% | 18.8% |
| Hinsdale, MT | 284 | 40% | 16.7% |
| Bakersfield, MO | 284 | 46% | 4.7% |
| Gary, SD | 284 | n/a |
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