| Index | Oldham | 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 | Oldham | South Dakota | National |
| Completed 8th grade | 91.9% | 89.1% | 84.3% |
| Completed high school | 91.9% | 86.8% | 83.0% |
| Completed some college | 45.5% | 60.4% | 59.4% |
| Completed associate degree | 34.3% | 38.5% | 38.5% |
| Completed bachelors | 20.2% | 27.5% | 30.3% |
| Completed masters | 2.0% | 8.1% | 11.5% |
| Completed professional degree | 1.0% | 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 Oldham. Using the proficiency score averages, the average test scores for Oldham, SD schools is n/a. The average student to teacher ratio is n/a. In Oldham, SD, an average of 91.9% of students have completed 8th grade and an average of 91.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| De Smet, SD | 1,041 | 61% | 26.4% |
| Arlington, SD | 1,007 | 57% | 19.5% |
| Howard, SD | 754 | 56% | 15.6% |
| Lake Preston, SD | 448 | 53% | 11.1% |
| Ramona, SD | 413 | 42% | 13.2% |
| Oldham, SD | 131 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Lester, AL | 131 | 42% | 12.5% |
| Driftwood, TX | 131 | 25% | 47.9% |
| St. Paul, AR | 131 | 33% | 30.7% |
| Wisdom, MT | 132 | 50% | 4.2% |
| McKittrick, CA | 130 | 58% | 19.8% |
| Oldham, SD | 131 | n/a |
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