| Index | Hennessey | Oklahoma | National |
| Average Test Scores | 33% | 32% | 48% |
| Student/Teacher ratio | 16:1 | 22:1 | 16:1 |
| Total public schools | 3 | 1,346 | 79,221 |
| Total private schools | n/a | 159 | 24,874 |
| Total post-secondary schools | n/a | 178 | 7,963 |
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| Index | Hennessey | Oklahoma | National |
| Completed 8th grade | 83.4% | 83.5% | 84.3% |
| Completed high school | 81.9% | 82.2% | 83.0% |
| Completed some college | 38.5% | 55.6% | 59.4% |
| Completed associate degree | 15.5% | 31.9% | 38.5% |
| Completed bachelors | 11.4% | 24.5% | 30.3% |
| Completed masters | 4.3% | 8.1% | 11.5% |
| Completed professional degree | 0.9% | 2.3% | 3.3% |
| Completed doctorate | 0.6% | 1.0% | 1.3% |
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in Hennessey. Using the proficiency score averages, the average test scores for Hennessey, OK schools is 33%. The average student to teacher ratio is 16:1. In Hennessey, OK, an average of 83.4% of students have completed 8th grade and an average of 81.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Loyal, OK | 105 | 42% | 12.5% |
| Dover, OK | 383 | 37% | 22.4% |
| Drummond, OK | 441 | 37% | 22.4% |
| Waukomis, OK | 1,239 | 32% | 32.8% |
| Hennessey, OK | 3,072 | 33% | 30.9% |
| City | Population | Avg. Test Scores | National Avg. |
| East Prairie, MO | 3,072 | 34% | 28.8% |
| Stanton, TX | 3,072 | 41% | 14.2% |
| East Douglas, MA | 3,073 | 57% | 19.4% |
| Mendenhall, MS | 3,070 | 30% | 37.5% |
| Providence, KY | 3,074 | 47% | 2.1% |
| Hennessey, OK | 3,072 | 33% | 30.9% |
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