| 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 |
| 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 | 103 | 42% | 12.5% |
| Dover, OK | 373 | 37% | 22.4% |
| Drummond, OK | 432 | 37% | 22.4% |
| Waukomis, OK | 1,201 | 32% | 32.8% |
| Hennessey, OK | 2,996 | 33% | 30.9% |
| City | Population | Avg. Test Scores | National Avg. |
| Prescott, AR | 2,995 | 29% | 39.6% |
| Pembroke, NC | 2,997 | 26% | 45.4% |
| Soda Springs, ID | 2,994 | 48% | 0.7% |
| Magnolia, MS | 2,998 | 24% | 51.0% |
| Milton, DE | 2,993 | 55% | 13.9% |
| Hennessey, OK | 2,996 | 33% | 30.9% |
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