| Index | Clarksville | Iowa | National |
| Average Test Scores | 75% | 69% | 48% |
| Student/Teacher ratio | 12:1 | 13:1 | 16:1 |
| Total public schools | 2 | 1,101 | 79,221 |
| Total private schools | n/a | 208 | 24,874 |
| Total post-secondary schools | n/a | 96 | 7,963 |
| Index | Clarksville | Iowa | National |
| Completed 8th grade | 85.9% | 89.2% | 84.3% |
| Completed high school | 82.0% | 87.7% | 83.0% |
| Completed some college | 39.4% | 59.8% | 59.4% |
| Completed associate degree | 21.7% | 38.4% | 38.5% |
| Completed bachelors | 10.5% | 27.2% | 30.3% |
| Completed masters | 3.9% | 8.7% | 11.5% |
| Completed professional degree | 0.0% | 2.7% | 3.3% |
| Completed doctorate | 0.0% | 1.1% | 1.3% |
There are a total of 2 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, IA schools is 75%. The average student to teacher ratio is 12:1. In Clarksville, IA, an average of 85.9% of students have completed 8th grade and an average of 82.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Waverly, IA | 10,172 | 81% | 68.3% |
| New Hartford, IA | 789 | 80% | 65.6% |
| Janesville, IA | 1,051 | 77% | 60.4% |
| Shell Rock, IA | 1,646 | 77% | 60.4% |
| Nashua, IA | 1,448 | 76% | 57.8% |
| Clarksville, IA | 1,345 | 75% | 55.2% |
| City | Population | Avg. Test Scores | National Avg. |
| Tsaile, AZ | 1,345 | 43% | 11.5% |
| Jewell Junction, IA | 1,346 | 80% | 65.6% |
| La Crosse, KS | 1,347 | 32% | 34.4% |
| Penhook, VA | 1,347 | 87% | 81.3% |
| Sutton-Alpine, AK | 1,343 | 20% | 58.3% |
| Clarksville, IA | 1,345 | 75% | 55.2% |
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