| Index | Londonderry | New Hampshire | National |
| Average Test Scores | 58% | 52% | 48% |
| Student/Teacher ratio | 17:1 | 13:1 | 16:1 |
| Total public schools | 6 | 234 | 79,221 |
| Total private schools | 7 | 144 | 24,874 |
| Total post-secondary schools | n/a | 40 | 7,963 |
| Index | Londonderry | New Hampshire | National |
| Completed 8th grade | 91.7% | 89.5% | 84.3% |
| Completed high school | 91.5% | 88.4% | 83.0% |
| Completed some college | 72.1% | 64.2% | 59.4% |
| Completed associate degree | 50.8% | 45.3% | 38.5% |
| Completed bachelors | 39.8% | 35.5% | 30.3% |
| Completed masters | 14.1% | 13.4% | 11.5% |
| Completed professional degree | 1.5% | 3.3% | 3.3% |
| Completed doctorate | 0.5% | 1.4% | 1.3% |
There are a total of 6 public schools, 7 private schools and n/a post-secondary schools in Londonderry. Using the proficiency score averages, the average test scores for Londonderry, NH schools is 58%. The average student to teacher ratio is 17:1. In Londonderry, NH, an average of 91.7% of students have completed 8th grade and an average of 91.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Andover, MA | 8,821 | 68% | 42.2% |
| Amherst, NH | 656 | 67% | 38.9% |
| Goffstown, NH | 2,848 | 62% | 29.2% |
| Pepperell, MA | 2,685 | 61% | 26.6% |
| East Merrimack, NH | 4,786 | 57% | 17.7% |
| Londonderry, NH | 12,053 | 58% | 21.0% |
| City | Population | Avg. Test Scores | National Avg. |
| Festus, MO | 12,054 | 59% | 23.1% |
| Scotts Valley, CA | 12,055 | 67% | 39.2% |
| Brookhaven, MS | 12,045 | 39% | 19.2% |
| Enumclaw, WA | 12,062 | 61% | 27.1% |
| Red Bank, NJ | 12,039 | 53% | 10.8% |
| Londonderry, NH | 12,053 | 58% | 21.0% |
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