| | Oak Brook, IL | Darien, IL | United States |
| Expend. per Student | $22,018 | $22,018 | $15,905 |
| Educ. Expend. per Student | $18,682 | $18,682 | $13,142 |
| Instr. Expend. per Student | $11,697 | $11,697 | $7,999 |
| Pupil/Teacher Ratio | 13.43 | 13.43 | 16.23 |
| Students per Librarian | 709 | 709 | 4573 |
| Students per Counselor | 535 | 535 | 530 |
| Grade School Educ. | 0.9% | 1.7% | 4.8% |
| Some High School Educ. | 1.0% | 2.1% | 6.3% |
| High School Educ. | 98.1% | 96.2% | 88.9% |
| Some College Educ. | 13.0% | 19.4% | 20.0% |
| 2 yr College Grad. | 6.1% | 6.4% | 8.7% |
| 4 yr College Grad. | 67.3% | 53.3% | 33.7% |
| Masters Grad. | 13.7% | 14.1% | 9.3% |
| Professional Degree | 15.1% | 3.5% | 2.2% |
| Doctorate Degree | 3.1% | 2.6% | 1.5% |