| Index | Tarkio | Missouri | National |
| Average Test Scores | 45% | 44% | 48% |
| Student/Teacher ratio | 17:1 | 14:1 | 16:1 |
| Total public schools | 3 | 1,899 | 79,221 |
| Total private schools | 1 | 531 | 24,874 |
| Total post-secondary schools | n/a | 213 | 7,963 |
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| Index | Tarkio | Missouri | National |
| Completed 8th grade | 87.5% | 86.0% | 84.3% |
| Completed high school | 83.6% | 84.2% | 83.0% |
| Completed some college | 46.5% | 57.7% | 59.4% |
| Completed associate degree | 26.9% | 35.2% | 38.5% |
| Completed bachelors | 19.7% | 27.6% | 30.3% |
| Completed masters | 4.0% | 10.4% | 11.5% |
| Completed professional degree | 1.6% | 2.8% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of 3 public schools, 1 private schools and n/a post-secondary schools in Tarkio. Using the proficiency score averages, the average test scores for Tarkio, MO schools is 45%. The average student to teacher ratio is 17:1. In Tarkio, MO, an average of 87.5% of students have completed 8th grade and an average of 83.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Hamburg, IA | 1,300 | 70% | 45.8% |
| Rock Port, MO | 1,335 | 67% | 39.6% |
| College Springs, IA | 251 | 58% | 19.8% |
| Fairfax, MO | 695 | 53% | 9.4% |
| Tarkio, MO | 1,481 | 45% | 7.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Pleasant Valley, NY | 1,481 | 43% | 11.5% |
| Greenfield, IL | 1,481 | 36% | 25.0% |
| Lewiston, CA | 1,481 | 35% | 27.1% |
| St. David, AZ | 1,481 | 46% | 4.9% |
| Beattyville, KY | 1,481 | 45% | 5.7% |
| Tarkio, MO | 1,481 | 45% | 7.3% |
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