Census-designated place · Hawaii
Mililani Mauka, Hawaii
Mililani Mauka, census-designated place, in Honolulu County, Hawaii. Mililani Mauka had 21,278 people in the ACS 2020-2024 5-year estimates (±1,160). GEOID 1551000.
Residents, 2020-2024
21,278
±1,160 (90% margin)
2020 Census count: 21,075
Median household income
$138,942
±$8,575 (90% margin)
Hawaii: $100,389
Median home value
$988,100
±$61,519 (90% margin)
Hawaii: $839,100
Median gross rent
$2,350
±$126 (90% margin)
Hawaii: $1,971
Where is Mililani Mauka and what county is it in?
Mililani Mauka is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Honolulu County, Hawaii. It covers 4.0 square miles of land, 5,277 residents per square mile in 2020.
Mililani Mauka is in the Urban Honolulu, HI metropolitan statistical area (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Mililani Mauka, and is it growing?
The 2020-2024 American Community Survey puts Mililani Mauka's population at 21,278 (±1,160). The 2020 Census counted 21,075 residents.
The Census Bureau publishes yearly population estimates for incorporated places only; Mililani Mauka is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Mililani Mauka | Honolulu County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 21,278 ±1,160 | 1,001,146 | no clear change |
| Households | 7,525 ±359 | 338,868 | +564 |
| Average household size | 2.82 ±0.11 | 2.85 | no clear change |
| Housing units | 7,747 ±361 | 374,304 | +472 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Mililani Mauka?
The median resident of Mililani Mauka is 38.7 years old; 24.2% are under 18 and 11.3% are 65 or older. The largest group is non-Hispanic Asian residents at 47.2%, then non-Hispanic residents of two or more races at 22.8%. 9.0% of residents were born outside the United States.
| Measure | Mililani Mauka | Honolulu County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 38.7 ±1.6 | 39.8 | no clear change |
| Under 18 years | 24.2% ±1.9 pts | 20.6% | – |
| 65 years and over | 11.3% ±1.5 pts | 19.6% | – |
| Male | 49.7% ±1.7 pts | 50.5% | – |
| Hispanic or Latino (any race) | 9.7% ±3.2 pts | 9.4% | no clear change |
| White alone, not Hispanic | 13.1% ±1.9 pts | 17.2% | no clear change |
| Black or African American alone, not Hispanic | 2.5% ±1.3 pts | 2.2% | no clear change |
| Asian alone, not Hispanic | 47.2% ±3.6 pts | 41.6% | −7.3 pts |
| American Indian and Alaska Native alone, not Hispanic | 0.2% ±0.2 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 4.3% ±1.7 pts | 9.1% | – |
| Two or more races, not Hispanic | 22.8% ±2.7 pts | 20.1% | – |
| Some other race alone, not Hispanic | 0.2% ±0.2 pts | 0.3% | – |
| Born outside the United States | 9.0% ±1.3 pts | 19.6% | −4.1 pts |
| Speak a language other than English at home (age 5+) | 12.4% ±2.0 pts | 26.0% | – |
| Civilian veterans (age 18+) | 9.3% ±1.5 pts | 8.7% | – |
| With a disability | 8.1% ±1.6 pts | 12.5% | – |
| No health insurance coverage | 1.8% ±0.7 pts | 3.3% | no clear change |
| High school graduate or higher (age 25+) | 98.4% ±0.7 pts | 93.2% | – |
| Bachelor's degree or higher (age 25+) | 51.5% ±2.7 pts | 38.5% | no clear change |
| Graduate or professional degree (age 25+) | 16.5% ±2.1 pts | 14.3% | – |
| Lived in the same house a year earlier | 88.8% ±2.4 pts | 86.6% | – |
| Moved from another state in the past year | 3.2% ±1.3 pts | 4.4% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Mililani Mauka earn?
Half of Mililani Mauka's 7,525 households earn less than $138,942 a year (±$8,575), against $106,195 in Honolulu County and $100,389 in Hawaii. In 2015-2019 it was $141,390 in 2024 dollars; the margins of error cannot tell the two periods apart. 3.3% of residents live below the poverty line.
| Measure | Mililani Mauka | Honolulu County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $138,942 ±$8,575 | $106,195 | no clear change |
| Mean household income | $160,699 ±$8,510 | $136,601 | – |
| Per capita income | $57,346 ±$3,193 | $47,516 | no clear change |
| People below the poverty line | 3.3% ±1.0 pts | 9.2% | no clear change |
| Children under 18 below the poverty line | 3.0% ±1.7 pts | 11.3% | – |
| Households receiving SNAP | 3.5% ±1.8 pts | 10.2% | – |
| Households with a computer | 99.0% ±0.7 pts | 96.4% | – |
| Households with a broadband subscription | 97.2% ±1.1 pts | 92.4% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Mililani Mauka?
Owners occupy 74.9% of Mililani Mauka's occupied homes and renters 25.1%. The median owner-occupied home is valued at $988,100 by its owner (±$61,519). The median renter pays $2,350 a month including utilities, and 48.9% of renters pay 35% or more of their income on rent.
| Measure | Mililani Mauka | Honolulu County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $988,100 ±$61,519 | $897,500 | +$137,444 |
| Median gross rent | $2,350 ±$126 | $2,083 | −$390 |
| Renters paying 35% or more of income on rent | 48.9% ±8.6 pts | 47.2% | no clear change |
| Median monthly owner costs, with a mortgage | $3,289 ±$148 | $3,111 | – |
| Owner-occupied homes | 74.9% ±3.5 pts | 59.8% | no clear change |
| Renter-occupied homes | 25.1% ±3.5 pts | 40.2% | – |
| Housing units | 7,747 ±361 | 374,304 | +472 |
| Homeowner vacancy rate | 0.0% ±0.6 pts | 0.9% | – |
| Rental vacancy rate | 2.1% ±2.9 pts | 5.6% | – |
| Single-family detached homes | 54.3% ±3.3 pts | 45.3% | – |
| Mobile homes | 0.2% ±0.3 pts | 0.2% | – |
| Built 2020 or later | 0.2% ±0.2 pts | 1.1% | – |
| Built 2010 to 2019 | 4.5% ±1.4 pts | 8.3% | – |
| Built 1939 or earlier | 0.0% ±0.4 pts | 3.0% | – |
| Households with no vehicle | 3.0% ±1.8 pts | 9.7% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Mililani Mauka work and get to work?
76.8% of Mililani Mauka's workers drive alone and 10.3% work from home. The average trip to work takes 29.0 minutes. The unemployment rate in 2020-2024 averaged 2.3%.
| Measure | Mililani Mauka | Honolulu County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 72.1% ±2.5 pts | 65.2% | – |
| Unemployment rate | 2.3% ±0.7 pts | 4.7% | no clear change |
| Drove alone to work | 76.8% ±3.2 pts | 63.4% | – |
| Carpooled | 10.2% ±1.7 pts | 13.8% | – |
| Public transportation | 1.2% ±0.6 pts | 4.9% | – |
| Walked | 0.3% ±0.3 pts | 5.2% | – |
| Worked from home | 10.3% ±2.8 pts | 9.2% | +6.7 pts |
| Mean travel time to work | 29.0 min ±1.1 | 26.7 min | −4.8 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Mililani Mauka?
7 census tracts lie mostly in Mililani Mauka (2020 census blocks). Their median household incomes run from $96,250 (Tract 89.26) to $204,583 (Tract 89.31).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 89.29Honolulu County | 5,510 | $99,818 |
| Tract 89.28Honolulu County | 3,949 | $166,150 |
| Tract 89.44Honolulu County | 3,843 | $128,224 |
| Tract 89.30Honolulu County | 2,387 | $161,290 |
| Tract 89.26Honolulu County | 1,818 | $96,250 |
| Tract 89.31Honolulu County | 2,959 | $204,583 |
| Tract 89.43Honolulu County | 1,005 | $174,519 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Mililani Mauka) · Census block assignment files
How does Mililani Mauka compare with other places in Hawaii?
Mililani Mauka ranks 9th of 125 places in Hawaii with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population (ACS 2020-2024) | 14th | 126 |
| Residents per square mile | 22nd | 126 |
| Median household income | 9th | 125 |
| Per capita income | 15th | 126 |
| Median home value | 25th | 120 |
| Median gross rent | 33rd | 119 |
| Poverty rate | 96th | 99 |
| Bachelor's degree or higher | 10th | 125 |
| Median age | 90th | 126 |
| Owner-occupied share | 45th | 119 |
| Work from home | 40th | 86 |
| Travel time to work | 65th | 126 |
Mililani Mauka's figures with every place in Hawaii (CSV)
Every place in Hawaii, sortable · Compare Mililani Mauka with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Mililani Mauka?
8 of the 57 figures for Mililani Mauka on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Mililani Mauka are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.