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/98129

98129

ZIP 98129 is in Seattle, Washington, in King County; area code 206; Pacific time. Seattle has 59 ZIP codes in all.

Type
No street area
Time zone
America/Los_Angeles
County
King
Coordinates
47.6062, -122.3321

The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

This ZIP code has no Census tabulation area of its own. Its point falls inside ZCTA 98164, whose figures describe that area — not this ZIP code.

☼ Live from 98129 — Seattle, WA

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Where 98129 is

This ZIP code has no Census tabulation area, so there is no boundary to draw — the marker is its published point location.

★ Weird and wonderful facts about 98129
  • 🔢 Type 98129 into a pocket calculator and turn it upside down: GZIBG — not quite a word, sorry.
  • ➕ 98129 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 29, a total 1,296 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111111101010001
  • 🏠 Its numerical neighbours: 98127 (Seattle, WA, 0 mi away) and 98131 (Seattle, WA, 0 mi away).
  • 🔄 Backwards, 98129 becomes 92189, which is not a ZIP code at all.
  • 👥 14 other ZIP codes are made of exactly the same digits (12989, 12998, 18929, 19892, 29819, 29918, …). The farthest-flung twin is 18929 in Jamison, PA, 2,367 miles away.
  • 🧭 Farther north than 97% of all ZIP codes, and farther west than 96%.
  • 🎯1,295 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 98129 and you would come out at 47.61°S, 57.67°E — 587 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 59m of daylight. Shortest: 8h 25m.
🌙 The sky over 98129 today
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Source: USGS.

Land area

ZIP codes near 98129

ZIPCityDistance
98111 Seattle, WA 0.0 mi
98114 Seattle, WA 0.0 mi
98124 Seattle, WA 0.0 mi
98131 Seattle, WA 0.0 mi
98138 Seattle, WA 0.0 mi
98145 Seattle, WA 0.0 mi
98160 Seattle, WA 0.0 mi
98161 Seattle, WA 0.0 mi
98181 Seattle, WA 0.0 mi
98185 Seattle, WA 0.0 mi

Find every ZIP code within 10 miles of 98129 →

Questions about this ZIP code

Where is ZIP code 98129?

98129 is in Seattle, Washington, in King County, part of the Seattle-Tacoma-Bellevue, WA metropolitan area. Its published point location is 47.6062, -122.3321.

What county is 98129 in?

98129 lies in King County.

What area code is 98129?

Seattle uses area code 206, from NANPA's telephone records.

What time zone is 98129 in?

98129 uses America/Los_Angeles.

What ZIP codes are near 98129?

The closest are 98111 (0 mi), 98114 (0 mi), 98124 (0 mi), 98131 (0 mi) and 98138 (0 mi).

Is 98129 a PO Box ZIP code?

Possibly. The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

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Cite this page

zipcodes.pro. “98129 ZIP Code — Seattle, Washington (King County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/98129

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/98129.json

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