| Index | Agar | 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 |
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| Index | Agar | South Dakota | National |
| Completed 8th grade | 88.1% | 89.1% | 84.3% |
| Completed high school | 88.1% | 86.8% | 83.0% |
| Completed some college | 54.8% | 60.4% | 59.4% |
| Completed associate degree | 19.0% | 38.5% | 38.5% |
| Completed bachelors | 14.3% | 27.5% | 30.3% |
| Completed masters | 0.0% | 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 Agar. Using the proficiency score averages, the average test scores for Agar, SD schools is n/a. The average student to teacher ratio is n/a. In Agar, SD, an average of 88.1% of students have completed 8th grade and an average of 88.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Gettysburg, SD | 1,273 | 73% | 52.8% |
| Onida, SD | 634 | 50% | 3.8% |
| Agar, SD | 69 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| House, NM | 69 | 45% | 6.3% |
| Orovada, NV | 69 | 50% | 4.2% |
| Macon, NC | 69 | 35% | 28.1% |
| Trona, CA | 69 | 33% | 30.7% |
| Blaine, KY | 69 | 47% | 2.1% |
| Agar, SD | 69 | n/a |
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