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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/98166

98166

ZIP 98166 is in Seattle, Washington, in King County; area code 206; Pacific time. Seattle has 59 ZIP codes in all.

Type
Standard
Time zone
America/Los_Angeles
County
King
Population
22,082
Coordinates
47.4516, -122.3530
☼ Live from 98166 — Seattle, WA

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Where 98166 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 98166
  • 🔢 Type 98166 into a pocket calculator and turn it upside down: ggIBG — not quite a word, sorry.
  • ➕ As a number, 98,166 = 2 × 3 × 16361. Its digits add up to 30, a total 1,024 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111111101110110
  • 🏠 Its numerical neighbours: 98165 (Seattle, WA, 18 mi away) and 98168 (Seattle, WA, 4 mi away).
  • 🔄 Backwards, 98166 becomes 66189, which is not a ZIP code at all.
  • 👥 10 other ZIP codes are made of exactly the same digits (16689, 16698, 18966, 68961, 69168, 89166, …). The farthest-flung twin is 96816 in Honolulu, HI, 2,671 miles away.
  • 🧭 Farther north than 96% of all ZIP codes, and farther west than 96%.
  • 🎯1,293 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 98166 and you would come out at 47.45°S, 57.65°E — 591 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 58m of daylight. Shortest: 8h 27m.
  • 📏 At 5.8 square miles of land, 98166 is bigger than 20% of ZIP codes — room for about 4.4 Central Parks.
🌙 The sky over 98166 today
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🌋 Shake report
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Source: USGS.

People and housing

Population22,082This ZIP22,082
Households8,961This ZIP8,961
Housing units9,823This ZIP9,823
Median age43.6This ZIP43.6Washington38.3US 38.9
Median household income$114,969This ZIP$114,969Washington$98,141US $80,734
Median home value$824,400This ZIP$824,400Washington$564,600US $332,700
Median gross rent$1,782This ZIP$1,782Washington$1,760US $1,413
Bachelor's degree or higher46.9%This ZIP46.9%
Mean commute28.5 minThis ZIP28.5 min
Population density3,823.1 / sq miThis ZIP3,823.1 / sq mi

Business and tax activity

Business establishments740This ZIP740
Employees6,025This ZIP6,025
Annual payroll$323,112,000This ZIP$323,112,000
Tax returns filed11,090This ZIP11,090
Total adjusted gross income$1,456,369,000This ZIP$1,456,369,000

Land area

Land area5.78 sq miThis ZIP5.78 sq mi
Water area1.63 sq miThis ZIP1.63 sq mi

Other place names in 98166

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

ZIP codes near 98166

ZIPCityDistance
98062 Seahurst, WA 1.3 mi
98148 Seattle, WA 1.3 mi
98158 Seattle, WA 2.1 mi
98146 Seattle, WA 3.4 mi
98168 Seattle, WA 3.6 mi
98188 Seattle, WA 3.8 mi
98198 Seattle, WA 4.5 mi
98178 Seattle, WA 6.0 mi
98032 Kent, WA 6.1 mi
98136 Seattle, WA 6.2 mi

Find every ZIP code within 10 miles of 98166 →

Questions about this ZIP code

Where is ZIP code 98166?

98166 is in Seattle, Washington, in King County, part of the Seattle-Tacoma-Bellevue, WA metropolitan area. Its published point location is 47.4516, -122.3530.

What county is 98166 in?

98166 lies in King County.

What area code is 98166?

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

What time zone is 98166 in?

98166 uses America/Los_Angeles.

How many people live in 98166?

About 22,082 people live in ZIP code 98166, in 8,961 households, at 3,823.1 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 98166?

$114,969 a year, against $98,141 across Washington.

What ZIP codes are near 98166?

The closest are 98062 (1.3 mi), 98148 (1.3 mi), 98158 (2.1 mi), 98146 (3.4 mi) and 98168 (3.6 mi).

Is 98166 a PO Box ZIP code?

98166 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “98166 ZIP Code — Seattle, Washington (King County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/98166

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