County Maps US

Kauai County, Hawaii

A county in Hawaii, ranked 4 of 5 by population.

CountyFIPS 15007

Within Hawaii
Kauai County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data.

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Population
73,400
+190 (+0.3%) since 2020
Land area
619.8
square miles. A further 51.1% of the total area is water
Population density
118
people per square mile, computed rather than published
County seat
Līhuʻe
Seat of county government.
Established
1905
120 years ago
Largest city
Not available
No incorporated place lies within this county.

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

Satellite view

Aerial imagery of Kauai County with its boundary drawn on top. A map shows you the shape; this shows you what is inside it, and which side of the line a place falls on.

Aerial view of Kauai County, Hawaii from the USGS National Map, with its boundary outlined
Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 800 by 444 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

Where Kauai County ranks

Position among the 5 counties of Hawaii, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn HawaiiNationally
Population73,4004th of 5765th of 3,144
Land area619.8 sq mi3rd of 51,554th of 3,144
Population density118 per sq mi3rd of 5803rd of 3,144
Median household income$97,6682nd of 5188th of 3,143

Full data for Kauai County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population73,400Vintage 2025 Population Estimates
Population in 202073,210Vintage 2025 Population Estimates
2020 estimates base?73,295Vintage 2025 Population Estimates
Land area619.8 sq mi2025 Gazetteer Files
Water area646.5 sq mi2025 Gazetteer Files
Total area1,266 sq mi2025 Gazetteer Files
Population density?118 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$97,668American Community Survey 2020-2024 5-Year Estimates
Median home value$873,200American Community Survey 2020-2024 5-Year Estimates
Median age43.1American Community Survey 2020-2024 5-Year Estimates
Households23,632American Community Survey 2020-2024 5-Year Estimates
Housing units30,471American Community Survey 2020-2024 5-Year Estimates

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026. Population density is computed here, not published: it divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.

How the population changed

The Census Bureau publishes the components behind an estimate, not just the total. For the year to July 2025:

Births minus deaths
+34
702 births, 668 deaths
Net migration
-78
More people moved out than moved in.

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

All 5 counties of Hawaii

Open the interactive Hawaii county map, or jump straight to any of them.

Data on this page last rebuilt 30 August 2026. How these figures are produced.