| | Decatur, IL | Belleville, IL | United States |
| Expend. per Student | $14,460 | $17,142 | $15,905 |
| Educ. Expend. per Student | $12,532 | $15,271 | $13,142 |
| Instr. Expend. per Student | $6,704 | $8,545 | $7,999 |
| Pupil/Teacher Ratio | 15.82 | 14.97 | 16.23 |
| Students per Librarian | 3721 | 2351 | 4573 |
| Students per Counselor | 771 | 636 | 530 |
| Grade School Educ. | 2.6% | 1.1% | 4.8% |
| Some High School Educ. | 7.4% | 4.2% | 6.3% |
| High School Educ. | 90.0% | 94.7% | 88.9% |
| Some College Educ. | 23.9% | 30.4% | 20.0% |
| 2 yr College Grad. | 7.6% | 10.3% | 8.7% |
| 4 yr College Grad. | 21.1% | 26.6% | 33.7% |
| Masters Grad. | 5.9% | 9.2% | 9.3% |
| Professional Degree | 0.9% | 0.7% | 2.2% |
| Doctorate Degree | 0.8% | 0.9% | 1.5% |