| | Keaau, HI | Pahoa, HI | United States |
| Population | 1,188 | 1,336 | 329,725,481 |
| Female Population | 51.0% | 44.8% | 50.5% |
| Male Population | 49.0% | 55.2% | 49.5% |
| Median Age | 49.5 | 45.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,788 | 890 | 309,327,143 |
| Population - 2000 | 2,010 | 962 | 285,036,114 |
| Population - 1990 | 1,584 | 1,027 | 251,960,433 |
| Pop. 2000 to Now | 35.5% | -16.8% | 15.6% |
| Pop. 1990 to Now | 72.0% | -22.1% | 30.8% |
| space4 | | | |
| Population Density | 461.2 | 610.3 | 93.4 |
| Land Area | 2.6 | 2.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Keaau, HI | Pahoa, HI | United States |
| Age 0 to 4 | 3.5% | 5.8% | 5.9% |
| Age 5 to 9 | 1.9% | 1.8% | 6.1% |
| Age 10 to 14 | 3.9% | 3.0% | 6.6% |
| Age 15 to 17 | 7.7% | 6.2% | 3.9% |
| Age 18 to 20 | 7.1% | 5.3% | 4.0% |
| Age 21 to 24 | 3.7% | 4.4% | 5.2% |
| Age 25 to 34 | 11.5% | 10.6% | 13.8% |
| Age 35 to 44 | 7.7% | 12.2% | 12.9% |
| Age 45 to 54 | 13.4% | 13.2% | 12.6% |
| Age 55 to 59 | 5.4% | 10.9% | 6.7% |
| Age 60 to 64 | 7.8% | 11.5% | 6.3% |
| Age 65 to 74 | 14.8% | 7.3% | 9.6% |
| Age 75 to 84 | 7.2% | 4.2% | 4.5% |
| Age 85 and over | 4.6% | 3.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Keaau, HI | Pahoa, HI | United States |
| White | 6.7% | 17.4% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 49.5% | 40.1% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 13.1% | 13.6% | 0.2% |
| Other | 0.0% | 7.0% | 0.4% |
| Two or More Races | 26.1% | 9.7% | 3.2% |
| Hispanic | 4.5% | 12.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Keaau, HI | Pahoa, HI | United States |
| Married Population | 35.8% | 38.1% | 49.8% |
| Currently Married | 35.8% | 36.1% | 48.0% |
| Married but Separated | 0.0% | 2.0% | 1.8% |
| Single Population | 64.2% | 61.9% | 50.2% |
| Never Married | 40.8% | 43.9% | 33.8% |
| Divorced | 13.1% | 13.1% | 10.8% |
| Widowed | 10.4% | 4.9% | 5.6% |
| space5 | | | |
| Household Size | 2.97 | 3.25 | 2.60 |
| Households | 395 | 411 | 124,010,992 |
| Family Households | 258 | 351 | 80,755,759 |
| Married couple, w/children | 40.3% | 17.7% | 30.5% |
| Married couple, no children | 23.3% | 30.8% | 42.9% |
| Non Family Households | 137 | 60 | 43,255,233 |
| Single householder, w/children | 10.9% | 13.4% | 15.8% |
| Single householder, no children | 25.6% | 38.2% | 10.8% |