| Index | Westerly | Rhode Island | National |
| Average Test Scores | 50% | 38% | 48% |
| Student/Teacher ratio | 14:1 | 15:1 | 16:1 |
| Total public schools | 6 | 193 | 79,221 |
| Total private schools | 1 | 114 | 24,874 |
| Total post-secondary schools | n/a | 24 | 7,963 |
| Index | Westerly | Rhode Island | National |
| Completed 8th grade | 85.8% | 83.8% | 84.3% |
| Completed high school | 85.5% | 82.4% | 83.0% |
| Completed some college | 60.5% | 59.3% | 59.4% |
| Completed associate degree | 40.3% | 41.0% | 38.5% |
| Completed bachelors | 29.5% | 32.5% | 30.3% |
| Completed masters | 11.6% | 13.1% | 11.5% |
| Completed professional degree | 2.0% | 3.9% | 3.3% |
| Completed doctorate | 0.8% | 1.8% | 1.3% |
There are a total of 6 public schools, 1 private schools and n/a post-secondary schools in Westerly. Using the proficiency score averages, the average test scores for Westerly, RI schools is 50%. The average student to teacher ratio is 14:1. In Westerly, RI, an average of 85.8% of students have completed 8th grade and an average of 85.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Fishers Island, NY | 61 | 80% | 66.7% |
| Stonington, CT | 899 | 77% | 60.4% |
| Ashaway, RI | 1,444 | 72% | 50.0% |
| Charlestown, RI | 1,392 | 70% | 44.8% |
| Pawcatuck, CT | 5,024 | 68% | 42.4% |
| Westerly, RI | 17,842 | 50% | 3.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Jenison, MI | 17,851 | 62% | 29.0% |
| Radford, VA | 17,833 | 83% | 73.1% |
| El Dorado, AR | 17,826 | 42% | 12.4% |
| Canby, OR | 17,860 | 45% | 6.6% |
| Amsterdam, NY | 17,823 | 37% | 22.1% |
| Westerly, RI | 17,842 | 50% | 3.1% |
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