Kauai County, Hawaii

Kauai County population, land area and income

Kauai County had 73,840 residents in the Census Vintage 2024 estimate, on 619.8 square miles of land. It ranks 4th of 5 in Hawaii by population and 3rd by land area. That works out to 119.1 people per square mile, 1.2 times the US average of 96.3, and above the national county median.

The median county-equivalent in Hawaii has 163,688 residents, so Kauai County has 45% of the typical county's population.

Its SAIPE 2023 median household income of $90,084 is in the top tenth among 3,143 counties with an estimate.

How Kauai County's population changed since 2020

Kauai County gained 631 residents between the July 2020 and July 2024 estimates, a rise of 0.9%. That ranks 3rd of 5 in Hawaii for growth. The median Hawaii county changed by +0.9%, and the state as a whole by -0.4%.

Since the April 2020 estimates base, Kauai County recorded 3,248 births and 2,700 deaths, a natural change of +548. Net international migration added +1,003 and net domestic migration, people moving to or from other US counties, came to -1,011. The largest single component was domestic migration, which removed 1,011 people.

Where Kauai County is

The Census internal point of Kauai County is at 22.012000, -159.706000. It sits in UTM zone 4N. The map shades Hawaii's 5 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Kauai County outlined. Dots are towns of 1,000+ people with residents in it.

Towns in Kauai County

No incorporated place of 1,000 or more people has residents in Kauai County. Its 73,840 residents live in smaller towns, census-designated places, or unincorporated land, which the subcounty estimates do not list at this size.

Counties bordering Kauai County

The Census 2024 county adjacency file lists no neighbor for Kauai County. The closest county-equivalent by internal point is Honolulu County, HI, 103.8 miles away.

Distance to Honolulu and the nearest big city

Honolulu is 128.3 miles ESE of Kauai County's internal point in a straight line. The nearest place of 100,000 or more is Urban Honolulu, HI (population 344,967), 128.4 miles away.

Kauai County FIPS code

The FIPS code of Kauai County is 15007: state code 15 for Hawaii plus county code 007. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $90,084.