| Index | Shirley | New York | National |
| Average Test Scores | 37% | 56% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | 3 | 4,060 | 79,221 |
| Total private schools | n/a | 1,092 | 24,874 |
| Total post-secondary schools | n/a | 483 | 7,963 |
| Index | Shirley | New York | National |
| Completed 8th grade | 81.5% | 83.5% | 84.3% |
| Completed high school | 80.1% | 82.1% | 83.0% |
| Completed some college | 44.3% | 59.5% | 59.4% |
| Completed associate degree | 27.5% | 43.4% | 38.5% |
| Completed bachelors | 17.6% | 34.7% | 30.3% |
| Completed masters | 7.7% | 15.1% | 11.5% |
| Completed professional degree | 1.8% | 4.2% | 3.3% |
| Completed doctorate | 0.4% | 1.5% | 1.3% |
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in Shirley. Using the proficiency score averages, the average test scores for Shirley, NY schools is 37%. The average student to teacher ratio is n/a. In Shirley, NY, an average of 81.5% of students have completed 8th grade and an average of 80.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Shoreham, NY | 375 | 82% | 69.8% |
| West Sayville, NY | 4,956 | 82% | 69.8% |
| Quogue, NY | 600 | 80% | 66.7% |
| Setauket-East Setauket, NY | 14,174 | 80% | 65.6% |
| Port Jefferson, NY | 8,016 | 77% | 60.8% |
| Shirley, NY | 28,640 | 37% | 22.4% |
| City | Population | Avg. Test Scores | National Avg. |
| East Haven, CT | 28,645 | 40% | 16.1% |
| Agawam Town, MA | 28,627 | 55% | 13.7% |
| Lake in the Hills, IL | 28,617 | 45% | 5.5% |
| Burton, MI | 28,598 | 27% | 43.1% |
| Forest Hills, MI | 28,690 | 72% | 49.7% |
| Shirley, NY | 28,640 | 37% | 22.4% |
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