| Index | Terryville | New York | National |
| Average Test Scores | 40% | 56% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | n/a | 4,060 | 79,221 |
| Total private schools | n/a | 1,092 | 24,874 |
| Total post-secondary schools | n/a | 483 | 7,963 |
| Index | Terryville | New York | National |
| Completed 8th grade | 86.5% | 83.5% | 84.3% |
| Completed high school | 85.6% | 82.1% | 83.0% |
| Completed some college | 59.4% | 59.5% | 59.4% |
| Completed associate degree | 42.5% | 43.4% | 38.5% |
| Completed bachelors | 34.6% | 34.7% | 30.3% |
| Completed masters | 13.8% | 15.1% | 11.5% |
| Completed professional degree | 2.8% | 4.2% | 3.3% |
| Completed doctorate | 0.3% | 1.5% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Terryville. Using the proficiency score averages, the average test scores for Terryville, NY schools is 40%. The average student to teacher ratio is n/a. In Terryville, NY, an average of 86.5% of students have completed 8th grade and an average of 85.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| West Sayville, NY | 4,956 | 82% | 69.8% |
| Shoreham, NY | 375 | 82% | 69.8% |
| Hauppauge, NY | 19,661 | 80% | 66.3% |
| Setauket-East Setauket, NY | 14,174 | 80% | 65.6% |
| Port Jefferson, NY | 8,016 | 77% | 60.8% |
| Terryville, NY | 11,437 | 40% | 17.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Emmaus, PA | 11,438 | 62% | 29.9% |
| Ravenna, OH | 11,436 | 57% | 19.2% |
| Upper Montclair, NJ | 11,439 | 63% | 30.6% |
| Manvel, TX | 11,432 | 49% | 2.5% |
| Signal Hill, CA | 11,430 | 52% | 8.3% |
| Terryville, NY | 11,437 | 40% | 17.7% |
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