| Statistic | Penrose | Arlington | Virginia |
| Population | 4,688 | 226,092 | 8,310,301 |
| Population density (sq mi) | 4,611 | 8,693 | 191 |
| Median age | 31.4 | 34.1 | 37.8 |
| Male/Female ratio | 1.2:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | n/a | 47% | 57% |
| Speak English | n/a | 71% | 84% |
| Speak Spanish | n/a | 13% | 7% |
| Race | Penrose | Arlington | Virginia |
| Caucasian | 65.21% | 72.17% | 68.75% |
| African American | 17.83% | 8.61% | 19.21% |
| Asian | 12.39% | 10.02% | 6.05% |
| American Indian | 1.43% | 0.39% | 0.26% |
| Native Hawaiian | 0.26% | 0.09% | 0.07% |
| Mixed race | 1.58% | 3.08% | 3.37% |
| Other race | 1.29% | 5.64% | 2.30% |