| Index | South Dennis | Massachusetts | National |
| Average Test Scores | 37% | 52% | 48% |
| Student/Teacher ratio | 12:1 | 14:1 | 16:1 |
| Total public schools | 1 | 1,167 | 79,221 |
| Total private schools | n/a | 508 | 24,874 |
| Total post-secondary schools | n/a | 193 | 7,963 |
| Index | South Dennis | Massachusetts | National |
| Completed 8th grade | 92.3% | 88.3% | 84.3% |
| Completed high school | 92.0% | 87.2% | 83.0% |
| Completed some college | 62.9% | 65.0% | 59.4% |
| Completed associate degree | 38.3% | 49.0% | 38.5% |
| Completed bachelors | 29.2% | 41.2% | 30.3% |
| Completed masters | 9.3% | 18.2% | 11.5% |
| Completed professional degree | 1.8% | 5.4% | 3.3% |
| Completed doctorate | 1.2% | 2.6% | 1.3% |
There are a total of 1 public schools, n/a private schools and n/a post-secondary schools in South Dennis. Using the proficiency score averages, the average test scores for South Dennis, MA schools is 37%. The average student to teacher ratio is 12:1. In South Dennis, MA, an average of 92.3% of students have completed 8th grade and an average of 92.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| North Eastham, MA | 1,811 | 76% | 57.3% |
| Orleans, MA | 1,576 | 65% | 35.4% |
| Brewster, MA | 1,374 | 62% | 29.2% |
| East Sandwich, MA | 3,760 | 60% | 25.0% |
| Harwich Center, MA | 1,431 | 55% | 13.5% |
| South Dennis, MA | 2,982 | 37% | 22.9% |
| City | Population | Avg. Test Scores | National Avg. |
| Falmouth, KY | 2,982 | 42% | 13.0% |
| Yadkinville, NC | 2,981 | 52% | 7.6% |
| Shady Shores, TX | 2,980 | 50% | 4.5% |
| Stamford, TX | 2,984 | 46% | 5.2% |
| Sunset, LA | 2,984 | 63% | 30.2% |
| South Dennis, MA | 2,982 | 37% | 22.9% |
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