| Index | Hardtner | Kansas | National |
| Average Test Scores | n/a | 35% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 970 | 79,221 |
| Total private schools | n/a | 190 | 24,874 |
| Total post-secondary schools | n/a | 86 | 7,963 |
| Index | Hardtner | Kansas | National |
| Completed 8th grade | 82.7% | 87.4% | 84.3% |
| Completed high school | 80.3% | 86.1% | 83.0% |
| Completed some college | 57.5% | 63.7% | 59.4% |
| Completed associate degree | 22.8% | 39.8% | 38.5% |
| Completed bachelors | 19.7% | 31.6% | 30.3% |
| Completed masters | 3.1% | 11.4% | 11.5% |
| Completed professional degree | 0.0% | 3.0% | 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 Hardtner. Using the proficiency score averages, the average test scores for Hardtner, KS schools is n/a. The average student to teacher ratio is n/a. In Hardtner, KS, an average of 82.7% of students have completed 8th grade and an average of 80.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Burlington, OK | 168 | 50% | 4.2% |
| Kiowa, KS | 852 | 39% | 19.8% |
| Alva, OK | 5,046 | 38% | 21.4% |
| Hardtner, KS | 208 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Karns City, PA | 208 | 64% | 33.3% |
| Marietta, MS | 208 | 72% | 50.0% |
| Okabena, MN | 208 | 35% | 27.1% |
| White Shield, ND | 208 | 25% | 48.6% |
| Kaltag, AK | 209 | 50% | 4.2% |
| Hardtner, KS | 208 | n/a |
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