| | Kaunakakai, HI | Mililani Mauka, HI | United States |
| Population | 3,263 | 21,657 | 329,725,481 |
| Female Population | 47.4% | 49.5% | 50.5% |
| Male Population | 52.7% | 50.5% | 49.5% |
| Median Age | 34.8 | 37.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,797 | 20,798 | 309,327,143 |
| Population - 2000 | 2,726 | 11,172 | 285,036,114 |
| Population - 1990 | 2,658 | 13 | 251,960,433 |
| Pop. 2000 to Now | 31.2% | 77.4% | 15.6% |
| Pop. 1990 to Now | 34.6% | 152,353.9% | 30.8% |
| space4 | | | |
| Population Density | 254.4 | 5,442.8 | 93.4 |
| Land Area | 12.8 | 4.0 | 3,531,905.4 |
| Water Area | 3.6 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Kaunakakai, HI | Mililani Mauka, HI | United States |
| Age 0 to 4 | 6.3% | 5.6% | 5.9% |
| Age 5 to 9 | 9.6% | 8.0% | 6.1% |
| Age 10 to 14 | 9.7% | 7.4% | 6.6% |
| Age 15 to 17 | 7.0% | 4.2% | 3.9% |
| Age 18 to 20 | 1.3% | 2.9% | 4.0% |
| Age 21 to 24 | 2.9% | 5.5% | 5.2% |
| Age 25 to 34 | 13.7% | 12.7% | 13.8% |
| Age 35 to 44 | 9.2% | 13.2% | 12.9% |
| Age 45 to 54 | 11.3% | 15.6% | 12.6% |
| Age 55 to 59 | 4.1% | 9.2% | 6.7% |
| Age 60 to 64 | 4.4% | 5.7% | 6.3% |
| Age 65 to 74 | 7.3% | 5.9% | 9.6% |
| Age 75 to 84 | 7.0% | 2.8% | 4.5% |
| Age 85 and over | 6.3% | 1.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Kaunakakai, HI | Mililani Mauka, HI | United States |
| White | 7.5% | 13.0% | 59.4% |
| Black | 0.8% | 2.9% | 12.2% |
| Asian | 10.9% | 52.6% | 5.6% |
| Native American | 0.1% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 36.0% | 2.8% | 0.2% |
| Other | 0.0% | 0.1% | 0.4% |
| Two or More Races | 33.7% | 18.4% | 3.2% |
| Hispanic | 10.9% | 9.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Kaunakakai, HI | Mililani Mauka, HI | United States |
| Married Population | 41.1% | 62.2% | 49.8% |
| Currently Married | 39.6% | 60.8% | 48.0% |
| Married but Separated | 1.5% | 1.4% | 1.8% |
| Single Population | 58.9% | 37.8% | 50.2% |
| Never Married | 42.7% | 28.6% | 33.8% |
| Divorced | 4.9% | 6.6% | 10.8% |
| Widowed | 11.3% | 2.6% | 5.6% |
| space5 | | | |
| Household Size | 3.09 | 2.91 | 2.60 |
| Households | 1,055 | 7,432 | 124,010,992 |
| Family Households | 721 | 5,773 | 80,755,759 |
| Married couple, w/children | 30.2% | 41.6% | 30.5% |
| Married couple, no children | 23.4% | 42.0% | 42.9% |
| Non Family Households | 334 | 1,659 | 43,255,233 |
| Single householder, w/children | 20.5% | 8.9% | 15.8% |
| Single householder, no children | 25.8% | 7.4% | 10.8% |