| Index | De Smet | South Dakota | National |
| Average Test Scores | 61% | 48% | 48% |
| Student/Teacher ratio | 12:1 | 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 | De Smet | South Dakota | National |
| Completed 8th grade | 93.3% | 89.1% | 84.3% |
| Completed high school | 89.1% | 86.8% | 83.0% |
| Completed some college | 53.0% | 60.4% | 59.4% |
| Completed associate degree | 27.8% | 38.5% | 38.5% |
| Completed bachelors | 22.4% | 27.5% | 30.3% |
| Completed masters | 5.1% | 8.1% | 11.5% |
| Completed professional degree | 1.6% | 2.5% | 3.3% |
| Completed doctorate | 0.5% | 1.2% | 1.3% |
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in De Smet. Using the proficiency score averages, the average test scores for De Smet, SD schools is 61%. The average student to teacher ratio is 12:1. In De Smet, SD, an average of 93.3% of students have completed 8th grade and an average of 89.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Lake Preston, SD | 448 | 53% | 11.1% |
| Iroquois, SD | 378 | 40% | 16.7% |
| De Smet, SD | 1,041 | 61% | 26.4% |
| City | Population | Avg. Test Scores | National Avg. |
| Marion, MT | 1,041 | 42% | 12.0% |
| Bessemer, PA | 1,041 | 66% | 36.8% |
| Luttrell, TN | 1,041 | 22% | 54.2% |
| Cloverport, KY | 1,041 | 46% | 3.5% |
| Randolph, NY | 1,041 | 46% | 4.5% |
| De Smet, SD | 1,041 | 61% | 26.4% |
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