| Index | Clarksville | Texas | National |
| Average Test Scores | 31% | 47% | 48% |
| Student/Teacher ratio | 10:1 | 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 | n/a | 463 | 7,963 |
| Index | Clarksville | Texas | National |
| Completed 8th grade | 77.8% | 79.3% | 84.3% |
| Completed high school | 75.7% | 77.8% | 83.0% |
| Completed some college | 37.5% | 57.3% | 59.4% |
| Completed associate degree | 15.1% | 34.9% | 38.5% |
| Completed bachelors | 11.8% | 28.1% | 30.3% |
| Completed masters | 2.3% | 9.6% | 11.5% |
| Completed professional degree | 1.4% | 2.6% | 3.3% |
| Completed doctorate | 0.6% | 1.1% | 1.3% |
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in Clarksville. Using the proficiency score averages, the average test scores for Clarksville, TX schools is 31%. The average student to teacher ratio is 10:1. In Clarksville, TX, an average of 77.8% of students have completed 8th grade and an average of 75.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Bogata, TX | 1,175 | 53% | 11.1% |
| Detroit, TX | 848 | 49% | 1.7% |
| Deport, TX | 810 | 30% | 38.5% |
| Clarksville, TX | 3,115 | 31% | 35.9% |
| City | Population | Avg. Test Scores | National Avg. |
| Beaver, UT | 3,115 | 60% | 25.5% |
| New Holstein, WI | 3,116 | 43% | 10.4% |
| Sloatsburg, NY | 3,114 | 47% | 2.1% |
| Early, TX | 3,113 | 54% | 12.8% |
| Pine City, MN | 3,113 | 48% | 1.0% |
| Clarksville, TX | 3,115 | 31% | 35.9% |
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