| Index | Henry | South Dakota | National |
| Average Test Scores | 47% | 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 | Henry | South Dakota | National |
| Completed 8th grade | 85.4% | 89.1% | 84.3% |
| Completed high school | 84.4% | 86.8% | 83.0% |
| Completed some college | 42.0% | 60.4% | 59.4% |
| Completed associate degree | 21.0% | 38.5% | 38.5% |
| Completed bachelors | 7.3% | 27.5% | 30.3% |
| Completed masters | 0.0% | 8.1% | 11.5% |
| Completed professional degree | 0.0% | 2.5% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Henry. Using the proficiency score averages, the average test scores for Henry, SD schools is 47%. The average student to teacher ratio is n/a. In Henry, SD, an average of 85.4% of students have completed 8th grade and an average of 84.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Florence, SD | 371 | 46% | 5.2% |
| Clark, SD | 1,233 | 42% | 11.7% |
| Garden City, SD | 93 | 20% | 58.3% |
| Henry, SD | 295 | 47% | 2.8% |
| City | Population | Avg. Test Scores | National Avg. |
| Grenada, CA | 295 | 42% | 12.5% |
| Winter, WI | 295 | 37% | 23.6% |
| Hiddenite, NC | 295 | 38% | 21.9% |
| Healy, KS | 295 | 50% | 4.2% |
| Hannibal, OH | 295 | 48% | 1.0% |
| Henry, SD | 295 | 47% | 2.8% |
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