| | Keaau, HI | Las Vegas, NV | United States |
| Population | 1,188 | 634,786 | 329,725,481 |
| Female Population | 51.0% | 49.8% | 50.5% |
| Male Population | 49.0% | 50.2% | 49.5% |
| Median Age | 49.5 | 37.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,788 | 584,600 | 309,327,143 |
| Population - 2000 | 2,010 | 478,434 | 285,036,114 |
| Population - 1990 | 1,584 | 258,295 | 251,960,433 |
| Pop. 2000 to Now | 35.5% | 38.5% | 15.6% |
| Pop. 1990 to Now | 72.0% | 156.4% | 30.8% |
| space4 | | | |
| Population Density | 461.2 | 4,477.6 | 93.4 |
| Land Area | 2.6 | 141.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Keaau, HI | Las Vegas, NV | United States |
| Age 0 to 4 | 3.5% | 6.0% | 5.9% |
| Age 5 to 9 | 1.9% | 6.4% | 6.1% |
| Age 10 to 14 | 3.9% | 7.0% | 6.6% |
| Age 15 to 17 | 7.7% | 4.1% | 3.9% |
| Age 18 to 20 | 7.1% | 3.5% | 4.0% |
| Age 21 to 24 | 3.7% | 4.7% | 5.2% |
| Age 25 to 34 | 11.5% | 14.4% | 13.8% |
| Age 35 to 44 | 7.7% | 13.7% | 12.9% |
| Age 45 to 54 | 13.4% | 13.2% | 12.6% |
| Age 55 to 59 | 5.4% | 6.5% | 6.7% |
| Age 60 to 64 | 7.8% | 5.7% | 6.3% |
| Age 65 to 74 | 14.8% | 9.1% | 9.6% |
| Age 75 to 84 | 7.2% | 4.2% | 4.5% |
| Age 85 and over | 4.6% | 1.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Keaau, HI | Las Vegas, NV | United States |
| White | 6.7% | 42.1% | 59.4% |
| Black | 0.0% | 11.1% | 12.2% |
| Asian | 49.5% | 6.6% | 5.6% |
| Native American | 0.0% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 13.1% | 0.7% | 0.2% |
| Other | 0.0% | 0.6% | 0.4% |
| Two or More Races | 26.1% | 4.5% | 3.2% |
| Hispanic | 4.5% | 34.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Keaau, HI | Las Vegas, NV | United States |
| Married Population | 35.8% | 45.7% | 49.8% |
| Currently Married | 35.8% | 43.7% | 48.0% |
| Married but Separated | 0.0% | 2.0% | 1.8% |
| Single Population | 64.2% | 54.3% | 50.2% |
| Never Married | 40.8% | 35.6% | 33.8% |
| Divorced | 13.1% | 13.5% | 10.8% |
| Widowed | 10.4% | 5.2% | 5.6% |
| space5 | | | |
| Household Size | 2.97 | 2.65 | 2.60 |
| Households | 395 | 236,410 | 124,010,992 |
| Family Households | 258 | 147,681 | 80,755,759 |
| Married couple, w/children | 40.3% | 28.8% | 30.5% |
| Married couple, no children | 23.3% | 38.3% | 42.9% |
| Non Family Households | 137 | 88,729 | 43,255,233 |
| Single householder, w/children | 10.9% | 19.5% | 15.8% |
| Single householder, no children | 25.6% | 13.5% | 10.8% |