| Index | Charlestown | New Hampshire | National |
| Average Test Scores | 41% | 52% | 48% |
| Student/Teacher ratio | 13:1 | 13:1 | 16:1 |
| Total public schools | 3 | 234 | 79,221 |
| Total private schools | n/a | 144 | 24,874 |
| Total post-secondary schools | n/a | 40 | 7,963 |
| Index | Charlestown | New Hampshire | National |
| Completed 8th grade | 92.9% | 89.5% | 84.3% |
| Completed high school | 91.8% | 88.4% | 83.0% |
| Completed some college | 51.7% | 64.2% | 59.4% |
| Completed associate degree | 29.9% | 45.3% | 38.5% |
| Completed bachelors | 14.9% | 35.5% | 30.3% |
| Completed masters | 3.0% | 13.4% | 11.5% |
| Completed professional degree | 0.0% | 3.3% | 3.3% |
| Completed doctorate | 0.0% | 1.4% | 1.3% |
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in Charlestown. Using the proficiency score averages, the average test scores for Charlestown, NH schools is 41%. The average student to teacher ratio is 13:1. In Charlestown, NH, an average of 92.9% of students have completed 8th grade and an average of 91.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| North Walpole, NH | 560 | 65% | 35.4% |
| Walpole, NH | 647 | 60% | 24.0% |
| Claremont, NH | 12,969 | 38% | 20.2% |
| Newport, NH | 5,530 | 33% | 31.8% |
| Charlestown, NH | 933 | 41% | 13.9% |
| City | Population | Avg. Test Scores | National Avg. |
| Mertztown, PA | 933 | 55% | 13.5% |
| Salem, NY | 933 | 53% | 10.9% |
| Wayne City, IL | 934 | 31% | 35.4% |
| Inkom, ID | 934 | 62% | 29.2% |
| Milford, TX | 934 | 25% | 49.0% |
| Charlestown, NH | 933 | 41% | 13.9% |
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