| Index | Niantic | Connecticut | National |
| Average Test Scores | 77% | 53% | 48% |
| Student/Teacher ratio | 10:1 | 14:1 | 16:1 |
| Total public schools | 5 | 654 | 79,221 |
| Total private schools | n/a | 207 | 24,874 |
| Total post-secondary schools | 1 | 81 | 7,963 |
| Index | Niantic | Connecticut | National |
| Completed 8th grade | 95.2% | 88.0% | 84.3% |
| Completed high school | 94.6% | 86.9% | 83.0% |
| Completed some college | 72.4% | 62.9% | 59.4% |
| Completed associate degree | 52.0% | 45.5% | 38.5% |
| Completed bachelors | 43.9% | 38.0% | 30.3% |
| Completed masters | 21.1% | 16.8% | 11.5% |
| Completed professional degree | 5.7% | 4.6% | 3.3% |
| Completed doctorate | 0.9% | 1.7% | 1.3% |
There are a total of 5 public schools, n/a private schools and 1 post-secondary schools in Niantic. Using the proficiency score averages, the average test scores for Niantic, CT schools is 77%. The average student to teacher ratio is 10:1. In Niantic, CT, an average of 95.2% of students have completed 8th grade and an average of 94.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Fishers Island, NY | 61 | 80% | 66.7% |
| Westbrook Center, CT | 2,257 | 77% | 60.4% |
| Chester Center, CT | 1,731 | 77% | 60.4% |
| Old Saybrook Center, CT | 1,984 | 71% | 46.9% |
| Deep River Center, CT | 2,638 | 70% | 44.8% |
| Niantic, CT | 3,083 | 77% | 59.4% |
| City | Population | Avg. Test Scores | National Avg. |
| Calera, OK | 3,082 | 26% | 45.8% |
| Chandler, TX | 3,085 | 43% | 10.9% |
| Bishop, TX | 3,085 | 60% | 25.3% |
| Greenwood Lake, NY | 3,080 | 75% | 56.3% |
| Dalzell, SC | 3,086 | 41% | 15.6% |
| Niantic, CT | 3,083 | 77% | 59.4% |
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