| | Darien, CT | Old Greenwich, CT | United States |
| Expend. per Student | $22,984 | $22,984 | $15,905 |
| Educ. Expend. per Student | $20,833 | $20,833 | $13,142 |
| Instr. Expend. per Student | $12,792 | $12,792 | $7,999 |
| Pupil/Teacher Ratio | 12.77 | 12.77 | 16.23 |
| Students per Librarian | 506 | 506 | 4573 |
| Students per Counselor | 356 | 356 | 530 |
| Grade School Educ. | 0.9% | 0.4% | 4.8% |
| Some High School Educ. | 0.9% | 1.6% | 6.3% |
| High School Educ. | 98.2% | 98.0% | 88.9% |
| Some College Educ. | 5.9% | 5.1% | 20.0% |
| 2 yr College Grad. | 1.9% | 1.9% | 8.7% |
| 4 yr College Grad. | 85.7% | 84.2% | 33.7% |
| Masters Grad. | 28.6% | 36.2% | 9.3% |
| Professional Degree | 7.2% | 9.7% | 2.2% |
| Doctorate Degree | 2.0% | 3.9% | 1.5% |