| Statistic | Greentree | Madison | Wisconsin |
| Population | 1,765 | 258,366 | 5,822,434 |
| Population density (sq mi) | 2,485 | 3,247 | 108 |
| Median age | 43.9 | 31.2 | 39.1 |
| Male/Female ratio | 0.9:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | n/a | 41% | 57% |
| Families w/ Kids under 18 | 36% | 44% | 43% |
| Speak English | n/a | 86% | 91% |
| Speak Spanish | n/a | 5% | 5% |
| Race | Greentree | Madison | Wisconsin |
| White | 68.11% | 77.49% | 86.21% |
| Black | 15.68% | 6.58% | 6.29% |
| Asian | 1.35% | 9.10% | 2.57% |
| American Indian | 0.00% | 0.44% | 0.89% |
| Native Hawaiian | 0.00% | 0.05% | 0.02% |
| Mixed race | 14.86% | 4.97% | 2.19% |
| Other race | 0.00% | 1.37% | 1.83% |
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