| | Kapalua, HI | Haleiwa, HI | United States |
| Population | 384 | 4,651 | 329,725,481 |
| Female Population | 47.4% | 49.1% | 50.5% |
| Male Population | 52.6% | 50.9% | 49.5% |
| Median Age | 57.5 | 42.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 509 | 4,023 | 309,327,143 |
| Population - 2000 | 467 | 2,225 | 285,036,114 |
| Population - 1990 | 408 | 2,442 | 251,960,433 |
| Pop. 2000 to Now | -33.6% | 58.3% | 15.6% |
| Pop. 1990 to Now | -24.0% | 44.3% | 30.8% |
| space4 | | | |
| Population Density | 79.3 | 2,037.2 | 93.4 |
| Land Area | 4.8 | 2.3 | 3,531,905.4 |
| Water Area | 1.0 | 0.7 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Kapalua, HI | Haleiwa, HI | United States |
| Age 0 to 4 | 0.3% | 4.8% | 5.9% |
| Age 5 to 9 | 3.1% | 6.8% | 6.1% |
| Age 10 to 14 | 4.2% | 4.2% | 6.6% |
| Age 15 to 17 | 1.0% | 2.6% | 3.9% |
| Age 18 to 20 | 0.5% | 2.0% | 4.0% |
| Age 21 to 24 | 0.3% | 1.6% | 5.2% |
| Age 25 to 34 | 10.4% | 15.2% | 13.8% |
| Age 35 to 44 | 12.0% | 15.8% | 12.9% |
| Age 45 to 54 | 14.1% | 11.1% | 12.6% |
| Age 55 to 59 | 7.0% | 7.2% | 6.7% |
| Age 60 to 64 | 12.5% | 7.3% | 6.3% |
| Age 65 to 74 | 24.2% | 14.6% | 9.6% |
| Age 75 to 84 | 7.8% | 5.4% | 4.5% |
| Age 85 and over | 2.6% | 1.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Kapalua, HI | Haleiwa, HI | United States |
| White | 64.3% | 27.8% | 59.4% |
| Black | 0.3% | 1.2% | 12.2% |
| Asian | 8.3% | 25.5% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 16.7% | 12.3% | 0.2% |
| Other | 0.0% | 0.2% | 0.4% |
| Two or More Races | 1.8% | 21.6% | 3.2% |
| Hispanic | 8.6% | 11.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Kapalua, HI | Haleiwa, HI | United States |
| Married Population | 72.7% | 42.7% | 49.8% |
| Currently Married | 71.8% | 42.2% | 48.0% |
| Married but Separated | 0.8% | 0.5% | 1.8% |
| Single Population | 27.3% | 57.3% | 50.2% |
| Never Married | 13.0% | 37.0% | 33.8% |
| Divorced | 9.3% | 12.1% | 10.8% |
| Widowed | 5.1% | 8.2% | 5.6% |
| space5 | | | |
| Household Size | 2.22 | 3.00 | 2.60 |
| Households | 173 | 1,548 | 124,010,992 |
| Family Households | 135 | 1,010 | 80,755,759 |
| Married couple, w/children | 16.3% | 32.4% | 30.5% |
| Married couple, no children | 71.9% | 36.6% | 42.9% |
| Non Family Households | 38 | 538 | 43,255,233 |
| Single householder, w/children | 6.7% | 10.6% | 15.8% |
| Single householder, no children | 5.2% | 20.4% | 10.8% |