Residential delivery area · Hawaii
ZIP Code 96789: Mililani, HI
ZIP code 96789 uses the postal name Mililani, Hawaii and lies entirely in Honolulu County (Census 2020 ZIP-county file). About 54,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $127,066 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Mililani Town (15%), Mililani Mauka (15%) and Waipio Acres (4%); 66% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2024
- ZBP2023
- IRS2022
- Town
- Mililani · its only residential ZIP
- County
- Honolulu County
- Census places
- Mililani Town (15%) census-designated place; Mililani Mauka (15%) census-designated place; Waipio Acres (4%) census-designated place
- Metro area
- Urban Honolulu, HI
- House districts
- HI-1 (73%), HI-2 (27%) 119th Congress, by share of land
- State
- Hawaii
- Time zone
- Hawaii-Aleutian
- Land area
- 26.4 sq mi · 2,054 people per sq mi
Where is ZIP code 96789?
96789 centers on 21.484°, -157.934° and covers 26.4 square miles of land plus 0.1 of water. It borders 5 ZIP codes: 96782, 96717, 96786, 96744, 96797.
The map draws ZIP code areas only. For the streets inside 96789, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 96789 compare with the rest of Honolulu County?
| Measure | 96789 | In Honolulu County | In HI |
|---|---|---|---|
| People (ACS 2020-2024) | 54,278 | 6th of 38 | 6th of 97 |
| Median household income | $127k | 6th of 25 | 7th of 58 |
| Median home value | $920k | 12th of 27 | 23rd of 70 |
Its median household income is higher than in 92% of U.S. residential ZIP codes, and it is denser than 85% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 96789?
The 2020 Census counted 54,732 people in 96789; the ACS, which samples households over 2020-2024, estimates 54,278. Between the 2010 and 2020 censuses its population grew 1.1% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 54,278
- 2020 Census count
- 54,732+1.1% since 2010 (54,129)
- Households
- 19,079
- Median age
- 42.1
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 96789?
Of the 54,278 people the ACS estimates in 96789, 21.8% are under 18 and 19.5% are 65 or older. The largest group by race and Hispanic origin is Asian (not Hispanic) (45.4%), then Other or two or more (30.2%).
- Under 1821.8%
- 18 to 6458.7%
- 65 and older19.5%
- Asian, not Hispanic45.4%
- Other or two or more30.2%
- White, not Hispanic11.2%
- Hispanic or Latino11.0%
- Black, not Hispanic2.3%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 96789 earn?
Median household income is $127,066 (ACS 2020-2024), the 6th highest of the 25 ranked ZIP codes in Honolulu County. It is not measurably different from 2015-2019 ($125,433 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $127,066
- Income per person
- $53,168
- Below the poverty line
- 3.6%
- Unemployed (of the labor force)
- 3.3%
- Adults 25+ with a bachelor's degree
- 45.0%
- Adjusted gross income per tax return, 2022
- $92,36726,590 returns; wages 67% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 96789?
- Median home value (owners' estimate)
- $920,400
- Median gross rent
- $2,314
- Homes owned by their occupants
- 77.8%
- Housing units
- 19,602
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 96789?
477 business establishments had a location in this ZIP code in 2023, 32 more than in 2018; the most are in other services (except public administration) (ZIP Code Business Patterns).
- Other services (except public administration)76
- Construction59
- Accommodation and food services56
- Professional, scientific, and technical services50
- Health care and social assistance44
- Retail trade41
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 96789?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 96782 | Pearl City | 37,475 | $109k | 2.6 mi |
| 96717 | Hauula | 4,580 | $103k | 5.4 mi |
| 96786 | Wahiawa | 40,658 | $86k | 6.8 mi |
| 96744 | Kaneohe | 57,620 | $132k | 7.2 mi |
| 96797 | Waipahu | 72,435 | $115k | 7.5 mi |
| 96701 | Aiea | 39,200 | $111k | 6.2 mi (near) |
| 96730 | Kaaawa | 1,478 | $127k | 6.9 mi (near) |
| 96857 | Schofield Barracks | 4,039 | – | 7.6 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.