| Index | Clarksville City | Texas | National |
| Average Test Scores | n/a | 47% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 7,418 | 79,221 |
| Total private schools | n/a | 1,267 | 24,874 |
| Total post-secondary schools | n/a | 463 | 7,963 |
| Index | Clarksville City | Texas | National |
| Completed 8th grade | 80.4% | 79.3% | 84.3% |
| Completed high school | 80.1% | 77.8% | 83.0% |
| Completed some college | 45.5% | 57.3% | 59.4% |
| Completed associate degree | 17.2% | 34.9% | 38.5% |
| Completed bachelors | 9.0% | 28.1% | 30.3% |
| Completed masters | 4.9% | 9.6% | 11.5% |
| Completed professional degree | 2.2% | 2.6% | 3.3% |
| Completed doctorate | 2.2% | 1.1% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Clarksville City. Using the proficiency score averages, the average test scores for Clarksville City, TX schools is n/a. The average student to teacher ratio is n/a. In Clarksville City, TX, an average of 80.4% of students have completed 8th grade and an average of 80.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| White Oak, TX | 6,301 | 56% | 17.4% |
| Gladewater, TX | 5,960 | 53% | 9.4% |
| Longview, TX | 82,183 | 49% | 2.4% |
| Big Sandy, TX | 1,406 | 44% | 9.1% |
| Gilmer, TX | 5,139 | 44% | 9.4% |
| Clarksville City, TX | 878 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Penryn, CA | 878 | 67% | 39.6% |
| Trezevant, TN | 878 | 31% | 36.5% |
| Edon, OH | 878 | 77% | 60.4% |
| Scooba, MS | 877 | 32% | 33.3% |
| Vaughn, MT | 877 | 28% | 42.7% |
| Clarksville City, TX | 878 | n/a |
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