Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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/96821

96821

ZIP 96821 is in Honolulu, Hawaii, in Honolulu County; area code 808; Hawaii-Aleutian time. Honolulu has 41 ZIP codes in all.

Type
Standard
Time zone
Pacific/Honolulu
County
Honolulu
Metro area
Urban Honolulu, HI
Population
20,053
Coordinates
21.3112, -157.7502
☼ Live from 96821 — Honolulu, HI

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Local time: —

Where 96821 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 96821
  • 🔢 Type 96821 into a pocket calculator and turn it upside down: IZBgG — not quite a word, sorry.
  • ➕ 96821 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 26, a total 2,038 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111101000110101
  • 🏠 Its numerical neighbours: 96820 (Honolulu, HI, 11 mi away) and 96822 (Honolulu, HI, 4 mi away).
  • 🔄 Backwards, 96821 becomes 12869, which is not a ZIP code at all.
  • 👥 33 other ZIP codes are made of exactly the same digits (12986, 16829, 16928, 18629, 18962, 21869, …). The farthest-flung twin is 18962 in Silverdale, PA, 4,895 miles away.
  • 🧭 Farther south than 99% of all ZIP codes, and farther west than 99%.
  • 🎯3,674 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 96821 and you would come out at 21.31°S, 22.25°E — 328 miles from Gaborone, Botswana, the nearest big city to that spot.
  • ☀Longest day of the year: 13h 26m of daylight. Shortest: 10h 50m.
  • 📏 At 11.6 square miles of land, 96821 is bigger than 29% of ZIP codes — room for about 8.8 Central Parks.
🌙 The sky over 96821 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population20,053This ZIP20,053
Households6,766This ZIP6,766
Housing units7,358This ZIP7,358
Median age50.7This ZIP50.7Hawaii40.9US 38.9
Median household income$174,938This ZIP$174,938Hawaii$100,389US $80,734
Median home value$1,563,300This ZIP$1,563,300Hawaii$839,100US $332,700
Median gross rent$3,061This ZIP$3,061Hawaii$1,971US $1,413
Bachelor's degree or higher61.1%This ZIP61.1%
Mean commute28.4 minThis ZIP28.4 min
Population density1,733.2 / sq miThis ZIP1,733.2 / sq mi

Business and tax activity

Business establishments271This ZIP271
Employees1,808This ZIP1,808
Annual payroll$78,437,000This ZIP$78,437,000
Tax returns filed9,630This ZIP9,630
Total adjusted gross income$1,773,886,000This ZIP$1,773,886,000

Land area

Land area11.57 sq miThis ZIP11.57 sq mi
Water area0.66 sq miThis ZIP0.66 sq mi

Other place names in 96821

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

ZIP codes near 96821

ZIPCityDistance
96824 Honolulu, HI 2.1 mi
96816 Honolulu, HI 3.0 mi
96795 Waimanalo, HI 3.0 mi
96822 Honolulu, HI 3.9 mi
96825 Honolulu, HI 3.9 mi
96839 Honolulu, HI 4.1 mi
96848 Honolulu, HI 4.2 mi
96844 Honolulu, HI 4.4 mi
96828 Honolulu, HI 4.8 mi
96826 Honolulu, HI 5.1 mi

Find every ZIP code within 10 miles of 96821 →

Questions about this ZIP code

Where is ZIP code 96821?

96821 is in Honolulu, Hawaii, in Honolulu County, part of the Urban Honolulu, HI metropolitan area. Its published point location is 21.3112, -157.7502.

What county is 96821 in?

96821 lies in Honolulu County.

What area code is 96821?

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

What time zone is 96821 in?

96821 uses Pacific/Honolulu.

How many people live in 96821?

About 20,053 people live in ZIP code 96821, in 6,766 households, at 1,733.2 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 96821?

$174,938 a year, against $100,389 across Hawaii.

What ZIP codes are near 96821?

The closest are 96824 (2.1 mi), 96816 (3 mi), 96795 (3 mi), 96822 (3.9 mi) and 96825 (3.9 mi).

Is 96821 a PO Box ZIP code?

96821 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “96821 ZIP Code — Honolulu, Hawaii (Honolulu County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/96821

Machine-readable version of these facts:

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