| Statistic | Eureka | Nevada | National |
| Population | 411 | 3,080,156 | 328,239,523 |
| Population density (sq mi) | 318 | 29 | 91 |
| Median age | 40.4 | 37.5 | 37.7 |
| Male/Female ratio | 1.1:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 55% | 51% | 55% |
| Families w/ Kids under 18 | 48% | 44% | 43% |
| Speak English | 96% | 70% | 79% |
| Speak Spanish | 1% | 21% | 13% |
| Race | Eureka | Nevada | National |
| White | 96.84% | 68.09% | 73.35% |
| Black | 0.24% | 8.58% | 12.63% |
| Asian | 2.68% | 7.84% | 5.22% |
| American Indian | 0.24% | 1.12% | 0.82% |
| Native Hawaiian | 0.00% | 0.65% | 0.18% |
| Mixed race | 0.00% | 4.54% | 3.06% |
| Other race | 0.00% | 9.18% | 4.75% |
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