| Statistic | McKinley Heights | St. Louis | Missouri |
| Population | 1,297 | 304,709 | 6,137,428 |
| Population density (sq mi) | 1,902 | 4,936 | 90 |
| Median age | 39.1 | 36.0 | 38.3 |
| Male/Female ratio | 1.1:1 | 0.9:1 | 1.0:1 |
| Married (15yrs & older) | n/a | 38% | 57% |
| Families w/ Kids under 18 | 41% | 42% | 42% |
| Speak English | n/a | 90% | 94% |
| Speak Spanish | n/a | 3% | 3% |
| Race | McKinley Heights | St. Louis | Missouri |
| White | 68.59% | 46.44% | 82.53% |
| Black | 27.80% | 45.66% | 11.58% |
| Asian | 1.57% | 3.37% | 1.78% |
| American Indian | 0.34% | 0.26% | 0.42% |
| Native Hawaiian | 0.37% | 0.04% | 0.11% |
| Mixed race | 0.91% | 3.10% | 2.44% |
| Other race | 0.43% | 1.13% | 1.13% |
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