Lihue or Līhuʻe is an unincorporated community, census-designated place (CDP) and the county seat of Kauai County, Hawaii, United States. Lihue (pronounced [liːˈhuʔe]) is the second largest town on the Hawaiian island of Kauaʻi after Kapaʻa. As of the 2010 census, the CDP had a population of 6,455, up from 5,694 at the 2000 census.
As of the census of 2000, there were 5,694 people, 2,178 households, and 1,420 families residing in the CDP. The population density was 898.3 people per square mile (346.6/km²). There were 2,399 housing units at an average density of 379.8 per square mile (146.6/km²). The racial makeup of the CDP was 22.8% White, 49.2% Asian, 0.2% Black or African American, 0.2% Native American, 6.4% Pacific Islander, 0.7% from other races, and 20.5% from two or more races. 6.5% of the population were Hispanic or Latino of any race.
There were 2,178 households out of which 25.8% had children under the age of 18 living with them, 48.9% were married couples living together, 11.8% had a female householder with no husband present, and 34.8% were non-families. 29.9% of all households were made up of individuals and 16.1% had someone living alone who was 65 years of age or older. The average household size was 2.55 and the average family size was 3.16.
In the CDP the population was spread out with 22.8% under the age of 18, 5.2% from 18 to 24, 23.7% from 25 to 44, 25.8% from 45 to 64, and 22.4% who were 65 years of age or older. The median age was 44 years. For every 100 females, there were 92.2 males. For every 100 females age 18 and over, there were 90.6 males.
The median income for a household in the CDP was $44,906, and the median income for a family was $56,875 in 2000. Males had a median income of $38,713 versus $28,032 for females. The per capita income for the CDP was $22,619. 4.6% of the population and 1.7% of families were below the poverty line. Out of the total population, 1.4% of those under the age of 18 and 7.3% of those 65 and older were living below the poverty line.