| Index | Posey | California | National |
| Average Test Scores | n/a | 43% | 48% |
| Student/Teacher ratio | n/a | 20:1 | 16:1 |
| Total public schools | n/a | 8,308 | 79,221 |
| Total private schools | n/a | 3,438 | 24,874 |
| Total post-secondary schools | n/a | 1,085 | 7,963 |
| Index | Posey | California | National |
| Completed 8th grade | 100.0% | 81.1% | 84.3% |
| Completed high school | 100.0% | 79.8% | 83.0% |
| Completed some college | 66.7% | 61.5% | 59.4% |
| Completed associate degree | 22.2% | 39.8% | 38.5% |
| Completed bachelors | 0.0% | 32.0% | 30.3% |
| Completed masters | 0.0% | 11.9% | 11.5% |
| Completed professional degree | 0.0% | 3.9% | 3.3% |
| Completed doctorate | 0.0% | 1.6% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Posey. Using the proficiency score averages, the average test scores for Posey, CA schools is n/a. The average student to teacher ratio is n/a. In Posey, CA, an average of 100.0% of students have completed 8th grade and an average of 100.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| California Hot Springs, CA | 40 | 50% | 4.2% |
| Kernville, CA | 791 | 30% | 37.5% |
| Lake Isabella, CA | 3,621 | 30% | 38.5% |
| Posey, CA | 0 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Arrey, NM | 0 | 25% | 47.9% |
| Garciasville, TX | 0 | 40% | 17.7% |
| Topock, AZ | 0 | 42% | 12.5% |
| Datil, NM | 0 | 50% | 4.2% |
| Etna, WY | 0 | 70% | 45.8% |
| Posey, CA | 0 | n/a |
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