| Statistic | Tacna | Arizona | National |
| Population | 580 | 7,278,717 | 328,239,523 |
| Population density (sq mi) | 302 | 65 | 91 |
| Median age | 45.4 | 37.1 | 37.7 |
| Male/Female ratio | 1.6:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 54% | 53% | 55% |
| Families w/ Kids under 18 | 49% | 42% | 43% |
| Speak English | 55% | 73% | 79% |
| Speak Spanish | 45% | 20% | 13% |
| Race | Tacna | Arizona | National |
| White | 73.10% | 77.80% | 73.35% |
| Black | 0.00% | 4.27% | 12.63% |
| Asian | 0.00% | 3.05% | 5.22% |
| American Indian | 0.00% | 4.41% | 0.82% |
| Native Hawaiian | 0.00% | 0.19% | 0.18% |
| Mixed race | 11.55% | 3.31% | 3.06% |
| Other race | 15.34% | 6.97% | 4.75% |
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