| Index | Plainfield | New Hampshire | National |
| Average Test Scores | n/a | 52% | 48% |
| Student/Teacher ratio | n/a | 13:1 | 16:1 |
| Total public schools | n/a | 234 | 79,221 |
| Total private schools | n/a | 144 | 24,874 |
| Total post-secondary schools | n/a | 40 | 7,963 |
| Index | Plainfield | New Hampshire | National |
| Completed 8th grade | 94.6% | 89.5% | 84.3% |
| Completed high school | 94.6% | 88.4% | 83.0% |
| Completed some college | 60.1% | 64.2% | 59.4% |
| Completed associate degree | 51.8% | 45.3% | 38.5% |
| Completed bachelors | 43.5% | 35.5% | 30.3% |
| Completed masters | 20.8% | 13.4% | 11.5% |
| Completed professional degree | 3.6% | 3.3% | 3.3% |
| Completed doctorate | 3.6% | 1.4% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Plainfield. Using the proficiency score averages, the average test scores for Plainfield, NH schools is n/a. The average student to teacher ratio is n/a. In Plainfield, NH, an average of 94.6% of students have completed 8th grade and an average of 94.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Hanover, NH | 8,744 | 82% | 70.5% |
| New London, NH | 1,364 | 67% | 39.6% |
| Lebanon, NH | 13,718 | 66% | 36.5% |
| Enfield, NH | 2,059 | 60% | 25.0% |
| Canaan, NH | 264 | 43% | 10.1% |
| Plainfield, NH | 265 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Provencal, LA | 265 | 67% | 38.5% |
| Stickney, SD | 265 | 70% | 44.8% |
| Hoople, ND | 265 | 60% | 25.0% |
| Freeburn, KY | 265 | 69% | 43.8% |
| Marty, SD | 265 | 5% | 89.6% |
| Plainfield, NH | 265 | n/a |
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