| Index | Garrison | Nebraska | National |
| Average Test Scores | n/a | 53% | 48% |
| Student/Teacher ratio | n/a | 13:1 | 16:1 |
| Total public schools | n/a | 780 | 79,221 |
| Total private schools | n/a | 182 | 24,874 |
| Total post-secondary schools | n/a | 56 | 7,963 |
| Index | Garrison | Nebraska | National |
| Completed 8th grade | 69.7% | 88.4% | 84.3% |
| Completed high school | 69.7% | 87.2% | 83.0% |
| Completed some college | 36.4% | 63.7% | 59.4% |
| Completed associate degree | 12.1% | 40.1% | 38.5% |
| Completed bachelors | 3.0% | 30.0% | 30.3% |
| Completed masters | 0.0% | 9.9% | 11.5% |
| Completed professional degree | 0.0% | 2.9% | 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 Garrison. Using the proficiency score averages, the average test scores for Garrison, NE schools is n/a. The average student to teacher ratio is n/a. In Garrison, NE, an average of 69.7% of students have completed 8th grade and an average of 69.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| David City, NE | 2,824 | 63% | 31.8% |
| Brainard, NE | 421 | 56% | 16.7% |
| Bellwood, NE | 415 | 55% | 14.6% |
| Shelby, NE | 714 | 54% | 12.2% |
| Dwight, NE | 220 | 50% | 4.2% |
| Garrison, NE | 33 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Langdon, KS | 33 | 22% | 54.2% |
| Cotopaxi, CO | 34 | 40% | 17.2% |
| Amado, AZ | 34 | 22% | 54.2% |
| Deputy, IN | 34 | 65% | 35.4% |
| Chignik Lagoon, AK | 35 | 50% | 4.2% |
| Garrison, NE | 33 | n/a |
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