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ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — ZIP/96789

96789

ZIP 96789 is Mililani, Hawaii, in Honolulu County; area code 808; Hawaii-Aleutian time.

Type
Standard
Time zone
Pacific/Honolulu
County
Honolulu
Metro area
Urban Honolulu, HI
Population
54,278
Coordinates
21.4839, -157.9343
☼ Live from 96789 — Mililani, HI

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Local time: —

Where 96789 is

Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.

★ Weird and wonderful facts about 96789
  • 🔢 Type 96789 into a pocket calculator and turn it upside down: GBLgG — not quite a word, sorry.
  • ➕ As a number, 96,789 = 3 × 7 × 11 × 419. Its digits add up to 39, a total 25 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111101000010101
  • 🏠 Its numerical neighbours: 96788 (Pukalani, HI, 112 mi away) and 96790 (Kula, HI, 118 mi away).
  • 🔄 Backwards, 96789 becomes 98769, which is not a ZIP code at all.
  • 👥 8 other ZIP codes are made of exactly the same digits (68979, 79698, 79968, 97869, 99678, 99687, …). The farthest-flung twin is 68979 in Sutton, NE, 3,717 miles away.
  • 🧭 Farther south than 98% of all ZIP codes, and farther west than 99%.
  • 🎯3,677 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 96789 and you would come out at 21.48°S, 22.07°E — 328 miles from Windhoek, Namibia, the nearest big city to that spot.
  • ☀Longest day of the year: 13h 27m of daylight. Shortest: 10h 49m.
  • 📏 At 26.4 square miles of land, 96789 is bigger than 43% of ZIP codes — room for about 20 Central Parks.
🌙 The sky over 96789 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population54,278This ZIP54,278
Households19,079This ZIP19,079
Housing units19,602This ZIP19,602
Median age42.1This ZIP42.1Hawaii40.9US 38.9
Median household income$127,066This ZIP$127,066Hawaii$100,389US $80,734
Median home value$920,400This ZIP$920,400Hawaii$839,100US $332,700
Median gross rent$2,314This ZIP$2,314Hawaii$1,971US $1,413
Bachelor's degree or higher45.0%This ZIP45.0%
Mean commute29.6 minThis ZIP29.6 min
Population density2,054.3 / sq miThis ZIP2,054.3 / sq mi

Business and tax activity

Business establishments477This ZIP477
Employees5,812This ZIP5,812
Annual payroll$283,069,000This ZIP$283,069,000
Tax returns filed26,590This ZIP26,590
Total adjusted gross income$2,456,036,000This ZIP$2,456,036,000

Land area

Land area26.42 sq miThis ZIP26.42 sq mi
Water area0.10 sq miThis ZIP0.10 sq mi

Other place names in 96789

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 96789

ZIPCityDistance
96782 Pearl City, HI 2.6 mi
96717 Hauula, HI 5.4 mi
96701 Aiea, HI 6.2 mi
96861 Camp H M Smith, HI 6.4 mi
96854 Wheeler Army Airfield, HI 6.5 mi
96786 Wahiawa, HI 6.8 mi
96730 Kaaawa, HI 6.9 mi
96744 Kaneohe, HI 7.2 mi
96797 Waipahu, HI 7.5 mi
96857 Schofield Barracks, HI 7.6 mi

Find every ZIP code within 10 miles of 96789 →

Questions about this ZIP code

Where is ZIP code 96789?

96789 is in Mililani, Hawaii, in Honolulu County, part of the Urban Honolulu, HI metropolitan area. Its published point location is 21.4839, -157.9343.

What county is 96789 in?

96789 lies in Honolulu County.

What area code is 96789?

Mililani uses area code 808, from NANPA's telephone records.

What time zone is 96789 in?

96789 uses Pacific/Honolulu.

How many people live in 96789?

About 54,278 people live in ZIP code 96789, in 19,079 households, at 2,054.3 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What is the median household income in 96789?

$127,066 a year, against $100,389 across Hawaii.

What ZIP codes are near 96789?

The closest are 96782 (2.6 mi), 96717 (5.4 mi), 96701 (6.2 mi), 96861 (6.4 mi) and 96854 (6.5 mi).

Is 96789 a PO Box ZIP code?

96789 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “96789 ZIP Code — Mililani, Hawaii (Honolulu County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/96789

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