| | Lihue, HI | Kapaau, HI | United States |
| Population | 8,371 | 2,044 | 329,725,481 |
| Female Population | 52.2% | 52.2% | 50.5% |
| Male Population | 47.8% | 47.9% | 49.5% |
| Median Age | 45.2 | 45.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 7,387 | 1,627 | 309,327,143 |
| Population - 2000 | 5,674 | 1,159 | 285,036,114 |
| Population - 1990 | 5,536 | 1,083 | 251,960,433 |
| Pop. 2000 to Now | 25.9% | 59.5% | 15.6% |
| Pop. 1990 to Now | 29.0% | 70.6% | 30.8% |
| space4 | | | |
| Population Density | 1,254.8 | 710.5 | 93.4 |
| Land Area | 6.7 | 2.9 | 3,531,905.4 |
| Water Area | 0.8 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Lihue, HI | Kapaau, HI | United States |
| Age 0 to 4 | 5.8% | 4.3% | 5.9% |
| Age 5 to 9 | 5.2% | 4.7% | 6.1% |
| Age 10 to 14 | 6.2% | 4.6% | 6.6% |
| Age 15 to 17 | 4.9% | 3.0% | 3.9% |
| Age 18 to 20 | 3.9% | 5.0% | 4.0% |
| Age 21 to 24 | 2.7% | 7.5% | 5.2% |
| Age 25 to 34 | 9.6% | 8.6% | 13.8% |
| Age 35 to 44 | 11.1% | 10.3% | 12.9% |
| Age 45 to 54 | 13.8% | 14.6% | 12.6% |
| Age 55 to 59 | 5.3% | 7.3% | 6.7% |
| Age 60 to 64 | 7.5% | 8.2% | 6.3% |
| Age 65 to 74 | 12.6% | 11.3% | 9.6% |
| Age 75 to 84 | 5.5% | 2.3% | 4.5% |
| Age 85 and over | 5.9% | 8.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Lihue, HI | Kapaau, HI | United States |
| White | 17.1% | 17.6% | 59.4% |
| Black | 1.9% | 1.3% | 12.2% |
| Asian | 42.1% | 22.2% | 5.6% |
| Native American | 0.6% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 4.9% | 5.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 18.7% | 19.3% | 3.2% |
| Hispanic | 14.8% | 34.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Lihue, HI | Kapaau, HI | United States |
| Married Population | 51.1% | 42.1% | 49.8% |
| Currently Married | 48.8% | 42.1% | 48.0% |
| Married but Separated | 2.3% | 0.0% | 1.8% |
| Single Population | 48.9% | 57.9% | 50.2% |
| Never Married | 32.0% | 40.4% | 33.8% |
| Divorced | 11.0% | 7.8% | 10.8% |
| Widowed | 5.9% | 9.7% | 5.6% |
| space5 | | | |
| Household Size | 3.15 | 3.00 | 2.60 |
| Households | 2,603 | 676 | 124,010,992 |
| Family Households | 1,741 | 418 | 80,755,759 |
| Married couple, w/children | 32.4% | 19.4% | 30.5% |
| Married couple, no children | 41.8% | 50.7% | 42.9% |
| Non Family Households | 862 | 258 | 43,255,233 |
| Single householder, w/children | 15.2% | 18.7% | 15.8% |
| Single householder, no children | 10.6% | 11.2% | 10.8% |