| Index | Gregory | South Dakota | National |
| Average Test Scores | 49% | 48% | 48% |
| Student/Teacher ratio | 14:1 | 14:1 | 16:1 |
| Total public schools | 3 | 340 | 79,221 |
| Total private schools | n/a | 76 | 24,874 |
| Total post-secondary schools | n/a | 25 | 7,963 |
| Index | Gregory | South Dakota | National |
| Completed 8th grade | 88.6% | 89.1% | 84.3% |
| Completed high school | 83.6% | 86.8% | 83.0% |
| Completed some college | 51.6% | 60.4% | 59.4% |
| Completed associate degree | 23.4% | 38.5% | 38.5% |
| Completed bachelors | 17.4% | 27.5% | 30.3% |
| Completed masters | 4.1% | 8.1% | 11.5% |
| Completed professional degree | 1.0% | 2.5% | 3.3% |
| Completed doctorate | 0.4% | 1.2% | 1.3% |
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in Gregory. Using the proficiency score averages, the average test scores for Gregory, SD schools is 49%. The average student to teacher ratio is 14:1. In Gregory, SD, an average of 88.6% of students have completed 8th grade and an average of 83.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Burke, SD | 705 | 57% | 19.4% |
| Colome, SD | 387 | 47% | 2.8% |
| Gregory, SD | 1,444 | 49% | 1.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Ashaway, RI | 1,444 | 72% | 50.0% |
| Fyffe, AL | 1,445 | 47% | 2.1% |
| Booker, TX | 1,443 | 58% | 21.4% |
| Oolitic, IN | 1,443 | 36% | 24.5% |
| Burton, OH | 1,443 | 71% | 47.9% |
| Gregory, SD | 1,444 | 49% | 1.7% |
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