| Index | Gettysburg | South Dakota | National |
| Average Test Scores | 73% | 48% | 48% |
| Student/Teacher ratio | 13:1 | 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 | Gettysburg | South Dakota | National |
| Completed 8th grade | 90.2% | 89.1% | 84.3% |
| Completed high school | 88.5% | 86.8% | 83.0% |
| Completed some college | 54.3% | 60.4% | 59.4% |
| Completed associate degree | 34.9% | 38.5% | 38.5% |
| Completed bachelors | 25.6% | 27.5% | 30.3% |
| Completed masters | 5.5% | 8.1% | 11.5% |
| Completed professional degree | 1.1% | 2.5% | 3.3% |
| Completed doctorate | 0.7% | 1.2% | 1.3% |
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in Gettysburg. Using the proficiency score averages, the average test scores for Gettysburg, SD schools is 73%. The average student to teacher ratio is 13:1. In Gettysburg, SD, an average of 90.2% of students have completed 8th grade and an average of 88.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Gettysburg, SD | 1,273 | 73% | 52.8% |
| City | Population | Avg. Test Scores | National Avg. |
| Lyles, TN | 1,273 | 24% | 49.3% |
| Bainbridge, NY | 1,273 | 55% | 15.1% |
| East Brookfield, MA | 1,273 | 60% | 24.0% |
| Waterford, PA | 1,273 | 69% | 43.4% |
| Clay City, IN | 1,273 | 47% | 1.6% |
| Gettysburg, SD | 1,273 | 73% | 52.8% |
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