| Index | Hartford | South Dakota | National |
| Average Test Scores | 47% | 48% | 48% |
| Student/Teacher ratio | 15:1 | 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 | Hartford | South Dakota | National |
| Completed 8th grade | 89.0% | 89.1% | 84.3% |
| Completed high school | 88.7% | 86.8% | 83.0% |
| Completed some college | 65.6% | 60.4% | 59.4% |
| Completed associate degree | 47.2% | 38.5% | 38.5% |
| Completed bachelors | 34.8% | 27.5% | 30.3% |
| Completed masters | 7.9% | 8.1% | 11.5% |
| Completed professional degree | 2.2% | 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 Hartford. Using the proficiency score averages, the average test scores for Hartford, SD schools is 47%. The average student to teacher ratio is 15:1. In Hartford, SD, an average of 89.0% of students have completed 8th grade and an average of 88.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Dell Rapids, SD | 3,678 | 64% | 34.0% |
| Montrose, SD | 551 | 60% | 25.0% |
| Tea, SD | 5,714 | 57% | 18.8% |
| Colton, SD | 754 | 55% | 15.3% |
| Harrisburg, SD | 6,420 | 54% | 13.3% |
| Hartford, SD | 3,300 | 47% | 1.6% |
| City | Population | Avg. Test Scores | National Avg. |
| Water Valley, MS | 3,300 | 36% | 26.0% |
| Elma, WA | 3,299 | 46% | 4.6% |
| Southampton, NY | 3,301 | 48% | 0.8% |
| Hauula, HI | 3,298 | 32% | 33.3% |
| Heavener, OK | 3,298 | 23% | 52.6% |
| Hartford, SD | 3,300 | 47% | 1.6% |
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