| Index | Hardin | Missouri | National |
| Average Test Scores | 45% | 44% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 1,899 | 79,221 |
| Total private schools | n/a | 531 | 24,874 |
| Total post-secondary schools | n/a | 213 | 7,963 |
| Index | Hardin | Missouri | National |
| Completed 8th grade | 86.2% | 86.0% | 84.3% |
| Completed high school | 86.2% | 84.2% | 83.0% |
| Completed some college | 37.1% | 57.7% | 59.4% |
| Completed associate degree | 18.5% | 35.2% | 38.5% |
| Completed bachelors | 13.6% | 27.6% | 30.3% |
| Completed masters | 6.8% | 10.4% | 11.5% |
| Completed professional degree | 0.5% | 2.8% | 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 Hardin. Using the proficiency score averages, the average test scores for Hardin, MO schools is 45%. The average student to teacher ratio is n/a. In Hardin, MO, an average of 86.2% of students have completed 8th grade and an average of 86.2% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Richmond, MO | 5,622 | 46% | 5.2% |
| Wellington, MO | 632 | 42% | 12.5% |
| Norborne, MO | 788 | 40% | 16.7% |
| Higginsville, MO | 4,627 | 39% | 18.8% |
| Lexington, MO | 4,540 | 33% | 31.6% |
| Hardin, MO | 655 | 45% | 6.8% |
| City | Population | Avg. Test Scores | National Avg. |
| Mohall, ND | 655 | 58% | 21.4% |
| Allendale, IL | 655 | 42% | 12.5% |
| Ellsinore, MO | 654 | 38% | 20.8% |
| Throckmorton, TX | 656 | 25% | 49.0% |
| Amherst, NH | 656 | 67% | 38.9% |
| Hardin, MO | 655 | 45% | 6.8% |
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