| Statistic | Petworth | Washington | District of Columbia |
| Population | 11,886 | 701,974 | 705,749 |
| Population density (sq mi) | 4,972 | 11,484 | 10,779 |
| Median age | 37.7 | 34.1 | 33.8 |
| Male/Female ratio | 1.0:1 | 0.9:1 | 0.9:1 |
| Married (15yrs & older) | n/a | 34% | 34% |
| Families w/ Kids under 18 | 46% | 41% | 43% |
| Speak English | n/a | 83% | 83% |
| Speak Spanish | n/a | 9% | 9% |
| Race | Petworth | Washington | District of Columbia |
| White | 32.36% | 41.07% | 40.37% |
| Black | 45.97% | 45.39% | 48.35% |
| Asian | 3.23% | 4.10% | 3.65% |
| American Indian | 0.17% | 0.35% | 0.33% |
| Native Hawaiian | 0.13% | 0.05% | 0.04% |
| Mixed race | 3.74% | 4.24% | 2.77% |
| Other race | 14.39% | 4.81% | 4.50% |
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