| Index | Henniker | New Hampshire | National |
| Average Test Scores | 53% | 52% | 48% |
| Student/Teacher ratio | 11:1 | 13:1 | 16:1 |
| Total public schools | 1 | 234 | 79,221 |
| Total private schools | n/a | 144 | 24,874 |
| Total post-secondary schools | 1 | 40 | 7,963 |
| Index | Henniker | New Hampshire | National |
| Completed 8th grade | 87.7% | 89.5% | 84.3% |
| Completed high school | 86.5% | 88.4% | 83.0% |
| Completed some college | 70.2% | 64.2% | 59.4% |
| Completed associate degree | 55.1% | 45.3% | 38.5% |
| Completed bachelors | 38.4% | 35.5% | 30.3% |
| Completed masters | 10.8% | 13.4% | 11.5% |
| Completed professional degree | 5.8% | 3.3% | 3.3% |
| Completed doctorate | 2.3% | 1.4% | 1.3% |
There are a total of 1 public schools, n/a private schools and 1 post-secondary schools in Henniker. Using the proficiency score averages, the average test scores for Henniker, NH schools is 53%. The average student to teacher ratio is 11:1. In Henniker, NH, an average of 87.7% of students have completed 8th grade and an average of 86.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Contoocook, NH | 1,353 | 68% | 42.0% |
| Goffstown, NH | 2,848 | 62% | 29.2% |
| Bradford, NH | 306 | 62% | 29.2% |
| Warner, NH | 638 | 52% | 8.3% |
| Concord, NH | 43,503 | 50% | 3.9% |
| Henniker, NH | 2,566 | 53% | 9.4% |
| City | Population | Avg. Test Scores | National Avg. |
| Graniteville, SC | 2,566 | 42% | 13.2% |
| Mattawan, MI | 2,567 | 64% | 32.3% |
| Crystal Lake, CT | 2,567 | 60% | 24.0% |
| Alden, NY | 2,565 | 66% | 36.8% |
| Pembroke, GA | 2,565 | 35% | 26.4% |
| Henniker, NH | 2,566 | 53% | 9.4% |
Here are the best places to live in New Hampshire
These are the 10 cheapest cities in New Hampshire
See the best places to live in Henniker
Most Dangerous Cities In The US