| Index | Geddes | 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 | Geddes | South Dakota | National |
| Completed 8th grade | 89.4% | 89.1% | 84.3% |
| Completed high school | 82.7% | 86.8% | 83.0% |
| Completed some college | 40.8% | 60.4% | 59.4% |
| Completed associate degree | 24.0% | 38.5% | 38.5% |
| Completed bachelors | 19.0% | 27.5% | 30.3% |
| Completed masters | 1.1% | 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 Geddes. Using the proficiency score averages, the average test scores for Geddes, SD schools is n/a. The average student to teacher ratio is n/a. In Geddes, SD, an average of 89.4% of students have completed 8th grade and an average of 82.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Platte, SD | 1,290 | 65% | 34.9% |
| Corsica, SD | 729 | 60% | 25.0% |
| Lake Andes, SD | 946 | 46% | 3.3% |
| Bonesteel, SD | 386 | 40% | 16.7% |
| Geddes, SD | 187 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Morristown, AZ | 187 | 30% | 38.5% |
| Moore, MT | 187 | 38% | 21.9% |
| Markleeville, CA | 187 | 50% | 4.2% |
| Weldona, CO | 188 | 24% | 50.5% |
| Gildford, MT | 188 | 50% | 4.2% |
| Geddes, SD | 187 | n/a |
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