| Statistic | Park Knoll | Milwaukee | Wisconsin |
| Population | 887 | 592,649 | 5,822,434 |
| Population density (sq mi) | 260 | 6,162 | 108 |
| Median age | 40.2 | 31.4 | 39.1 |
| Male/Female ratio | 0.8:1 | 0.9:1 | 1.0:1 |
| Married (15yrs & older) | n/a | 35% | 57% |
| Families w/ Kids under 18 | 48% | 51% | 43% |
| Speak English | n/a | 79% | 91% |
| Speak Spanish | n/a | 15% | 5% |
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| Race | Park Knoll | Milwaukee | Wisconsin |
| White | 63.85% | 42.05% | 86.21% |
| Black | 15.98% | 38.79% | 6.29% |
| Asian | 7.22% | 4.60% | 2.57% |
| American Indian | 3.78% | 0.53% | 0.89% |
| Native Hawaiian | 0.00% | 0.04% | 0.02% |
| Mixed race | 6.54% | 5.63% | 2.19% |
| Other race | 2.62% | 8.36% | 1.83% |
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