96789 ZIP Code — Mililani, HI

Honolulu County, Hawaii

ZIP code 96789 is located in Mililani, Hawaii, within Honolulu County. It covers approximately 26.37 square miles and serves a population of 54,362 residents. This is a po box ZIP code in the Hawaii (HT) — no DST timezone, served by area code 808.

About ZIP code 96789

The housing stock consists of a mix of housing types. Most homes were built in the 1970s, giving the area an established character. Median home value is $832,900. Owner-occupancy is high at 80%, well above the national average.

Median household income is $119,475. The poverty rate of 4% is below the national average. 36% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 30 minutes is near the national average.

Educational attainment is near the national average, with 43% of residents holding a bachelor's degree or higher.

Notable community characteristics include a notable veteran presence at 12% of civilians, above the national average of 7%.

Overall, ZIP code 96789 reflects a community defined by a strong veteran community, high homeownership, and a significant Social Security-dependent population.

54,362
population
26.37
sq mi land
PO Box
ZIP type
Hawaii (HT) — no DST
timezone
96789 ZIP code map
Cities in ZIP code 96789

Below are the cities the US Postal Service accepts for ZIP code 96789. Using any city not on this list may result in mail delivery delays.

City Status
Mililani Acceptable
Demographics updated 06/2026
Population
Total population 54,362
Population density 2,062 / sq mi
State FIPS 15
County FIPS 003
Geography
Land area 26.37 sq mi
Water area 0.15 sq mi
Latitude 21.4516
Longitude -157.9529
Timezone Hawaii (HT) — no DST
Area code 808
Total population by age
Gender
Race & ethnicity
Economics updated 06/2026
Household income
Income range This ZIP County avg State avg
Under $50k 16.4% 26.7% 29.0%
$50k – $100k 30.0% 29.4% 29.8%
$100k – $200k 39.8% 31.2% 29.9%
Over $200k 13.8% 12.7% 11.3%

Demographics & statistics

54,362
Population
2,062
People per sq mi
41.8
Median age
$119,475
Median household income
$49,165
Per capita income
$832,900
Median home value
$2,253
Median monthly rent
79.5%
Home ownership
3.5%
Poverty rate
2.8%
Unemployment
15,698
Housing units
42.8%
Bachelor's or higher

Age distribution

Male Female
1,334
Under 5
1,257
1,599
5–9
1,505
1,977
10–14
1,861
1,530
15–19
1,441
1,530
20–24
1,441
3,545
25–34
3,338
3,521
35–44
3,315
3,682
45–54
3,467
2,177
55–59
2,050
1,877
60–64
1,768
3,087
65–74
2,907
1,556
75–84
1,466
583
85+
548
← Male
Female →

Age summary

GroupCount%
Under 1811,42521.0%
18 and over42,93779.0%
65 and over10,14718.7%
Median age41.8 years

Race & ethnicity

Asian 47.2%
Two or more races 28.1%
White 12.3%
Native Hawaiian / Pacific Islander 4.7%
Hispanic or Latino 3.8%
Black or African American 2.7%
Other race 1.2%
American Indian / Alaska Native 0.1%
GroupCount%
Asian26,65647.2%
Two or more races15,85428.1%
White6,95712.3%
Native Hawaiian / Pacific Islander2,6464.7%
Hispanic or Latino2,1493.8%
Black or African American1,5062.7%
Other race6821.2%
American Indian / Alaska Native610.1%

Household income

Income range This ZIP County avg State avg
Under $50k 16.4% 26.7% 29.0%
$50k – $100k 30.0% 29.4% 29.8%
$100k – $200k 39.8% 31.2% 29.9%
Over $200k 13.8% 12.7% 11.3%
Under $10k 2.2%
$10k–$15k 0.2%
$15k–$25k 2.4%
$25k–$35k 3.6%
$35k–$50k 6.6%
$50k–$75k 11.8%
$75k–$100k 12.7%
$100k–$150k 22.4%
$150k–$200k 19.7%
$200k+ 18.4%
Range% of households
Under $10k2.2%
$10k–$15k0.2%
$15k–$25k2.4%
$25k–$35k3.6%
$35k–$50k6.6%
$50k–$75k11.8%
$75k–$100k12.7%
$100k–$150k22.4%
$150k–$200k19.7%
$200k+18.4%
Median income$119,475

Housing

Home values

Under $50k 0.6%
$50k–$100k 0.5%
$100k–$150k 0.2%
$150k–$200k 0.2%
$200k–$300k 1.8%
$300k–$500k 16.2%
$500k–$1M 55.4%
$1M+ 25.0%

Housing overview

MetricValue
Median home value$832,900
Median rent / month$2,253
Owner occupied79.5%
Renter occupied20.5%
Vacant3.2%
Single-family detached59.0%
Large apartment buildings6.8%
Mobile homes0.1%
Median rooms5.4
Avg household size (owned)2.86

Year built

Era%
2020 or later0.0%
2010–20192.3%
2000–200916.4%
1990–199922.4%
1980–198919.4%
1970–197930.8%
1960–19696.0%
1950–19592.2%
1940–19490.2%
1939 or earlier0.3%

Bedrooms

Size% of units
No bedroom (studio)0.8%
1 bedroom3.8%
2 bedrooms26.2%
3 bedrooms38.8%
4 bedrooms23.8%
5+ bedrooms6.6%

Vehicles per household

Vehicles% of households
No vehicle2.3%
1 vehicle26.8%
2 vehicles40.8%
3 or more30.0%

Heating fuel

Fuel type%
Utility gas1.3%
Electricity44.9%
Propane / LP gas0.6%
Solar5.2%
No fuel used47.9%

Households & families

Household typeCount%
Married-couple family11,38460.1%
Cohabiting couple1,0595.6%
Male householder, no spouse2,92015.4%
Female householder, no spouse3,58218.9%
Households with children under 186,14032.4%
Households with seniors (65+)7,11737.6%
Average household size2.87

Marital status

StatusMaleFemale
Never married33.6%24.9%
Married55.7%56.5%
Separated0.6%1.4%
Widowed2.4%8.2%
Divorced7.8%9.0%

Education

Less than 9th grade 1.1%
Some HS, no diploma 2.4%
HS graduate 20.8%
Some college, no degree 19.8%
Associate's degree 13.2%
Bachelor's degree 28.5%
Graduate / professional 14.3%
Metric%
HS diploma or higher96.5%
Bachelor's or higher42.8%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool6745.2%
Kindergarten4113.2%
Elementary school5,59642.9%
High school2,74121.0%
College / grad school3,61227.7%

Employment

Industry of employment

Education & healthcare 24.9%
Public administration 14.8%
Arts, food & hospitality 9.9%
Retail trade 9.4%
Professional & management 8.0%
Construction 7.6%
Transportation & utilities 7.6%
Finance & real estate 5.8%
Manufacturing 4.1%
Other services 3.3%
Wholesale trade 2.9%
Information 1.3%
Agriculture & mining 0.3%

Occupation

Category%
Management, business & arts42.4%
Service18.2%
Sales & office21.4%
Natural resources & construction8.9%
Production & transportation9.1%

Employment type

Type%
Private sector64.4%
Government30.9%
Self-employed4.5%
Unpaid family workers0.1%

Commute

Method%
Drive alone78.1%
Carpool10.6%
Public transit2.3%
Walk0.8%
Work from home6.6%
Other means1.6%
Avg commute (minutes)30.4

Poverty

All people 3.5%
Under 18 years 4.4%
18 and over 3.2%
Married-couple families 0.9%
Female-led households 6.5%

Income support

Source% of households
Social Security36.2%
Retirement income35.6%
Supplemental Security3.0%
Cash public assistance2.5%
Food stamps / SNAP5.0%

Health indicators

Condition%
Obesity22.1%
High blood pressure26.9%
High cholesterol28.8%
Diabetes8.8%
Heart disease3.5%
Stroke2.2%
Asthma8.2%
Arthritis16.2%
Kidney disease2.0%
Pulmonary disease3.0%
Cancer4.5%
Behavior / access%
Smoking10.6%
Binge drinking16.0%
No physical activity17.8%
Less than 7 hrs sleep41.4%
Depression13.3%
Fair or poor health9.6%
Poor mental health11.1%
Poor physical health6.4%
No health insurance8.0%
Visited doctor (checkup)79.1%
Visited dentist77.3%
Cholesterol screening88.0%
Teeth loss5.0%

Veterans & disability

VeteransCount%
Civilian veterans4,92011.9%
Disability%
Any disability10.9%
Under 185.7%
18–64 years6.6%
65 and over30.0%

Health insurance coverage

Type%
Private insurance87.3%
Public insurance30.1%
No insurance2.0%
Uninsured under 191.7%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only51,77195.2%
Spanish2,1184.1%
Other Indo-European990.2%
Asian & Pacific Islander230.0%
Other languages1,9863.8%

Place of birth & citizenship

OriginCount%
Native born (US)48,46489.2%
Born in same state46,53885.6%
Born in different state36,23266.6%
Foreign born1,9263.5%
Naturalized citizen5,89810.8%
Not a US citizen4,41274.8%

Ancestry

AncestryCount%
French1,9893.7%
Italian1,9793.6%
Arab5911.1%
Polish1650.3%
Dutch1400.3%
AncestryCount%
English1270.2%
Irish930.2%
German330.1%
Norwegian290.1%

Technology access

Metric% of households
Computer access34.8%
Internet access97.1%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 96789

What part of Mililani is ZIP code 96789?

ZIP code 96789 covers a portion of Mililani, Hawaii, within Honolulu County.

What county is ZIP code 96789 in?

ZIP code 96789 falls within Honolulu County, Hawaii.

Does ZIP code 96789 have a large veteran population?

12% of civilians in ZIP code 96789 are veterans, above the national average of ~7%.

Does ZIP code 96789 have a large retiree population?

36% of households in ZIP code 96789 receive Social Security income, suggesting a significant retiree or disability population.

What is the typical home value in ZIP code 96789?

The median home value in ZIP code 96789 is $832,900.

What is the median household income in ZIP code 96789?

The median household income in ZIP code 96789 is $119,475, above the national median of ~$75,000.

What timezone is ZIP code 96789 in?

ZIP code 96789 observes the HST timezone.

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