| | Islip, NY | Brookhaven, NY | United States |
| Expend. per Student | $30,219 | $30,219 | $15,905 |
| Educ. Expend. per Student | $26,965 | $26,965 | $13,142 |
| Instr. Expend. per Student | $18,018 | $18,018 | $7,999 |
| Pupil/Teacher Ratio | 12.27 | 12.27 | 16.23 |
| Students per Librarian | 1114 | 1114 | 4573 |
| Students per Counselor | 356 | 356 | 530 |
| Grade School Educ. | 8.4% | 3.1% | 4.8% |
| Some High School Educ. | 6.2% | 5.0% | 6.3% |
| High School Educ. | 85.4% | 91.9% | 88.9% |
| Some College Educ. | 17.5% | 17.7% | 20.0% |
| 2 yr College Grad. | 9.8% | 10.8% | 8.7% |
| 4 yr College Grad. | 31.0% | 34.2% | 33.7% |
| Masters Grad. | 10.7% | 11.6% | 9.3% |
| Professional Degree | 2.2% | 2.3% | 2.2% |
| Doctorate Degree | 0.9% | 1.9% | 1.5% |