| Index | Dennis | Massachusetts | National |
| Average Test Scores | n/a | 52% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 1,167 | 79,221 |
| Total private schools | n/a | 508 | 24,874 |
| Total post-secondary schools | n/a | 193 | 7,963 |
| Index | Dennis | Massachusetts | National |
| Completed 8th grade | 96.0% | 88.3% | 84.3% |
| Completed high school | 96.0% | 87.2% | 83.0% |
| Completed some college | 74.6% | 65.0% | 59.4% |
| Completed associate degree | 57.3% | 49.0% | 38.5% |
| Completed bachelors | 49.5% | 41.2% | 30.3% |
| Completed masters | 25.7% | 18.2% | 11.5% |
| Completed professional degree | 5.8% | 5.4% | 3.3% |
| Completed doctorate | 1.3% | 2.6% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Dennis. Using the proficiency score averages, the average test scores for Dennis, MA schools is n/a. The average student to teacher ratio is n/a. In Dennis, MA, an average of 96.0% of students have completed 8th grade and an average of 96.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| North Eastham, MA | 1,741 | 76% | 57.3% |
| Orleans, MA | 1,519 | 65% | 35.4% |
| Brewster, MA | 1,347 | 62% | 29.2% |
| East Sandwich, MA | 3,628 | 60% | 25.0% |
| Harwich Center, MA | 1,383 | 55% | 13.5% |
| Dennis, MA | 1,962 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Clinton, NY | 1,961 | 71% | 48.3% |
| Questa, NM | 1,961 | 27% | 43.3% |
| Clancy, MT | 1,964 | 61% | 27.9% |
| Columbus, MT | 1,964 | 54% | 12.2% |
| Peosta, IA | 1,964 | 87% | 81.3% |
| Dennis, MA | 1,962 | n/a |
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