| | Darien, CT | Potomac, MD | United States |
| Expend. per Student | $22,984 | $19,736 | $15,905 |
| Educ. Expend. per Student | $20,833 | $16,697 | $13,142 |
| Instr. Expend. per Student | $12,792 | $10,703 | $7,999 |
| Pupil/Teacher Ratio | 12.77 | 13.63 | 16.23 |
| Students per Librarian | 506 | 490 | 4573 |
| Students per Counselor | 356 | 292 | 530 |
| Grade School Educ. | 0.9% | 1.2% | 4.8% |
| Some High School Educ. | 0.9% | 1.3% | 6.3% |
| High School Educ. | 98.2% | 97.5% | 88.9% |
| Some College Educ. | 5.9% | 7.1% | 20.0% |
| 2 yr College Grad. | 1.9% | 2.5% | 8.7% |
| 4 yr College Grad. | 85.7% | 83.8% | 33.7% |
| Masters Grad. | 28.6% | 27.6% | 9.3% |
| Professional Degree | 7.2% | 14.9% | 2.2% |
| Doctorate Degree | 2.0% | 11.5% | 1.5% |