Honolulu County, Hawaii

The most populous of Hawaii's 5 counties.

CountyFIPS 15003

Within Hawaii

Honolulu 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: 988,703; -23,631 (-2.3%) since 2020
Land area: 600.8; square miles. A further 72.3% of the total area is water
Population density: 1,646; people per square mile, computed rather than published
County seat: Honolulu; Seat of county government.
Established: 1907; 118 years ago
Largest city: Urban Honolulu CDP; Population 341,868.

Satellite view

Aerial imagery of Honolulu 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 Honolulu 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 358 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 Honolulu 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.

Measure	Value	In Hawaii	Nationally
Population	988,703	1st of 5	54th of 3,144
Land area	600.8 sq mi	4th of 5	1,622nd of 3,144
Population density	1,646 per sq mi	1st of 5	96th of 3,144
Median household income	$106,195	1st of 5	118th of 3,143

Full data for Honolulu County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
Measure	Value	Source and vintage
Population	988,703	Vintage 2025 Population Estimates
Population in 2020	1,012,334	Vintage 2025 Population Estimates
2020 estimates base?	1,016,504	Vintage 2025 Population Estimates
Land area	600.8 sq mi	2025 Gazetteer Files
Water area	1,565 sq mi	2025 Gazetteer Files
Total area	2,166 sq mi	2025 Gazetteer Files
Population density?	1,646 per sq mi	Computed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income	$106,195	American Community Survey 2020-2024 5-Year Estimates
Median home value	$897,500	American Community Survey 2020-2024 5-Year Estimates
Median age	39.8	American Community Survey 2020-2024 5-Year Estimates
Households	338,868	American Community Survey 2020-2024 5-Year Estimates
Housing units	374,304	American 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: +1,864; 10,391 births, 8,527 deaths
Net migration: -3,251; 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.