| Index | Marion | South Dakota | National |
| Average Test Scores | 52% | 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 | Marion | South Dakota | National |
| Completed 8th grade | 92.8% | 89.1% | 84.3% |
| Completed high school | 86.3% | 86.8% | 83.0% |
| Completed some college | 59.4% | 60.4% | 59.4% |
| Completed associate degree | 31.0% | 38.5% | 38.5% |
| Completed bachelors | 17.0% | 27.5% | 30.3% |
| Completed masters | 3.6% | 8.1% | 11.5% |
| Completed professional degree | 0.5% | 2.5% | 3.3% |
| Completed doctorate | 0.5% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Marion. Using the proficiency score averages, the average test scores for Marion, SD schools is 52%. The average student to teacher ratio is n/a. In Marion, SD, an average of 92.8% of students have completed 8th grade and an average of 86.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Bridgewater, SD | 322 | 70% | 44.8% |
| Canistota, SD | 663 | 66% | 37.2% |
| Freeman, SD | 1,641 | 62% | 29.9% |
| Parker, SD | 876 | 57% | 19.1% |
| Hurley, SD | 416 | 35% | 28.1% |
| Marion, SD | 911 | 52% | 7.6% |
| City | Population | Avg. Test Scores | National Avg. |
| Hazel Green, WI | 911 | 47% | 1.7% |
| South Wallins, KY | 911 | 52% | 8.3% |
| Logan, NM | 911 | 36% | 24.2% |
| Highfield-Cascade, MD | 912 | 40% | 17.7% |
| Pinon, AZ | 910 | 20% | 57.8% |
| Marion, SD | 911 | 52% | 7.6% |
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