| Index | Parker | South Dakota | National |
| Average Test Scores | 57% | 48% | 48% |
| Student/Teacher ratio | 14:1 | 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 |
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| Index | Parker | South Dakota | National |
| Completed 8th grade | 93.2% | 89.1% | 84.3% |
| Completed high school | 91.2% | 86.8% | 83.0% |
| Completed some college | 54.5% | 60.4% | 59.4% |
| Completed associate degree | 31.3% | 38.5% | 38.5% |
| Completed bachelors | 20.4% | 27.5% | 30.3% |
| Completed masters | 5.9% | 8.1% | 11.5% |
| Completed professional degree | 1.6% | 2.5% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in Parker. Using the proficiency score averages, the average test scores for Parker, SD schools is 57%. The average student to teacher ratio is 14:1. In Parker, SD, an average of 93.2% of students have completed 8th grade and an average of 91.2% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Canistota, SD | 663 | 66% | 37.2% |
| Freeman, SD | 1,641 | 62% | 29.9% |
| Lennox, SD | 2,432 | 58% | 20.1% |
| Marion, SD | 911 | 52% | 7.6% |
| Hurley, SD | 416 | 35% | 28.1% |
| Parker, SD | 876 | 57% | 19.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Stone Harbor, NJ | 876 | 80% | 66.7% |
| Cherokee, AL | 876 | 37% | 22.9% |
| Occidental, CA | 876 | 60% | 24.0% |
| Worden, IL | 875 | 57% | 18.8% |
| Taylor, AR | 875 | 67% | 39.6% |
| Parker, SD | 876 | 57% | 19.1% |
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