| Index | Clarendon | Texas | National |
| Average Test Scores | 56% | 47% | 48% |
| Student/Teacher ratio | 11:1 | 14:1 | 16:1 |
| Total public schools | 3 | 7,418 | 79,221 |
| Total private schools | n/a | 1,267 | 24,874 |
| Total post-secondary schools | 1 | 463 | 7,963 |
| Index | Clarendon | Texas | National |
| Completed 8th grade | 80.7% | 79.3% | 84.3% |
| Completed high school | 79.1% | 77.8% | 83.0% |
| Completed some college | 48.6% | 57.3% | 59.4% |
| Completed associate degree | 21.9% | 34.9% | 38.5% |
| Completed bachelors | 15.0% | 28.1% | 30.3% |
| Completed masters | 4.8% | 9.6% | 11.5% |
| Completed professional degree | 0.2% | 2.6% | 3.3% |
| Completed doctorate | 0.2% | 1.1% | 1.3% |
There are a total of 3 public schools, n/a private schools and 1 post-secondary schools in Clarendon. Using the proficiency score averages, the average test scores for Clarendon, TX schools is 56%. The average student to teacher ratio is 11:1. In Clarendon, TX, an average of 80.7% of students have completed 8th grade and an average of 79.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Hedley, TX | 245 | 60% | 25.0% |
| Clarendon, TX | 1,810 | 56% | 15.6% |
| City | Population | Avg. Test Scores | National Avg. |
| Louisa, VA | 1,810 | 78% | 61.8% |
| Stockton, MO | 1,810 | 49% | 1.0% |
| Loretto, TN | 1,810 | 34% | 28.6% |
| Crosbyton, TX | 1,810 | 30% | 38.5% |
| Monroe, IA | 1,810 | 78% | 63.0% |
| Clarendon, TX | 1,810 | 56% | 15.6% |
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