| Index | Spencer | South Dakota | National |
| Average Test Scores | n/a | 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 | Spencer | South Dakota | National |
| Completed 8th grade | 78.1% | 89.1% | 84.3% |
| Completed high school | 75.0% | 86.8% | 83.0% |
| Completed some college | 28.1% | 60.4% | 59.4% |
| Completed associate degree | 19.8% | 38.5% | 38.5% |
| Completed bachelors | 3.1% | 27.5% | 30.3% |
| Completed masters | 1.0% | 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 Spencer. Using the proficiency score averages, the average test scores for Spencer, SD schools is n/a. The average student to teacher ratio is n/a. In Spencer, SD, an average of 78.1% of students have completed 8th grade and an average of 75.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Bridgewater, SD | 322 | 70% | 44.8% |
| Canistota, SD | 663 | 66% | 37.2% |
| Alexandria, SD | 766 | 58% | 20.4% |
| Salem, SD | 1,183 | 48% | = 100 |
| Emery, SD | 510 | 42% | 12.0% |
| Spencer, SD | 132 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Wisdom, MT | 132 | 50% | 4.2% |
| Lester, AL | 131 | 42% | 12.5% |
| St. Paul, AR | 131 | 33% | 30.7% |
| Driftwood, TX | 131 | 25% | 47.9% |
| Greycliff, MT | 133 | 50% | 4.2% |
| Spencer, SD | 132 | n/a |
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