| Index | Thayer | Missouri | National |
| Average Test Scores | 58% | 44% | 48% |
| Student/Teacher ratio | 12:1 | 14:1 | 16:1 |
| Total public schools | 2 | 1,899 | 79,221 |
| Total private schools | n/a | 531 | 24,874 |
| Total post-secondary schools | n/a | 213 | 7,963 |
| Index | Thayer | Missouri | National |
| Completed 8th grade | 80.7% | 86.0% | 84.3% |
| Completed high school | 75.9% | 84.2% | 83.0% |
| Completed some college | 42.6% | 57.7% | 59.4% |
| Completed associate degree | 19.5% | 35.2% | 38.5% |
| Completed bachelors | 12.6% | 27.6% | 30.3% |
| Completed masters | 4.3% | 10.4% | 11.5% |
| Completed professional degree | 2.3% | 2.8% | 3.3% |
| Completed doctorate | 2.1% | 1.2% | 1.3% |
There are a total of 2 public schools, n/a private schools and n/a post-secondary schools in Thayer. Using the proficiency score averages, the average test scores for Thayer, MO schools is 58%. The average student to teacher ratio is 12:1. In Thayer, MO, an average of 80.7% of students have completed 8th grade and an average of 75.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Mammoth Spring, AR | 1,117 | 52% | 8.3% |
| Hardy, AR | 765 | 49% | 2.4% |
| Alton, MO | 638 | 30% | 37.5% |
| Koshkonong, MO | 153 | 24% | 51.0% |
| Thayer, MO | 2,578 | 58% | 19.8% |
| City | Population | Avg. Test Scores | National Avg. |
| Independence, LA | 2,578 | 47% | 1.7% |
| Jefferson, MD | 2,577 | 58% | 20.8% |
| Owensville, MO | 2,579 | 43% | 9.7% |
| Loogootee, IN | 2,579 | 55% | 13.5% |
| Leisure Knoll, NJ | 2,580 | 62% | 28.1% |
| Thayer, MO | 2,578 | 58% | 19.8% |
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