Counties in Hawaii by population density

Name: Counties in Hawaii by population density, 2021
Creator: U.S. Census Bureau
License: Public domain (US federal government work, citation requested)

Honolulu County had the highest population density of 5 counties in 2021, at 645.4 inhabitants per km². Kalawao County had the lowest, at 2.6 inhabitants per km². The median was 46 inhabitants per km² and the figure for Hawaii was 87 inhabitants per km². Source: the U.S. Census Bureau.

Highest645.4Honolulu County

Lowest2.6Kalawao County

Median465 counties

Hawaii87History

All counties, 2021

CSV Chart (SVG)

inhabitants per km². Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

Rank	Counties	2021 inhabitants per km²	Change on 2020
1	Honolulu County	645.4	-0.8%
2	Maui County	54.8	0%
3	Kauai County	46	+0.9%
4	Hawaii County	19.5	+1.6%
5	Kalawao County	2.6	+1.2%

Other periods

About this ranking

Resident population divided by land area in km². World Bank figures use mid-year population and land area excluding inland water.

United States: Census Bureau population estimates for 1 July divided by land area (water excluded) from the latest Census Gazetteer files. US tables often give people per square mile; multiply persons per km² by 2.59 to compare.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-09.

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Rank Counties in Hawaii by population density using official data, and cite the source.

rank_places {"indicator":"population_density","level":"province","within":"Hawaii","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=population_density&level=province&within=Hawaii&limit=10

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Questions

Which county has the highest population density?

Honolulu County, with 645.4 inhabitants per km² in 2021, according to the U.S. Census Bureau.

Which county has the lowest population density?

Kalawao County, with 2.6 inhabitants per km² in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². Retrieved 2026-10-09.