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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/98240

98240

ZIP 98240 is Custer, Washington, in Whatcom County; Pacific time.

Type
Standard
Time zone
America/Los_Angeles
County
Whatcom
Metro area
Bellingham, WA
Population
3,593
Coordinates
48.9482, -122.6207
☼ Live from 98240 — Custer, WA

Weather right now

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Local time: —

Where 98240 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 98240
  • 🔢 Type 98240 into a pocket calculator and turn it upside down: OhZBG — not quite a word, sorry.
  • ➕ As a number, 98,240 = 2 × 2 × 2 × 2 × 2 × 2 × 5 × 307. Its digits add up to 23, a total 2,533 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111111111000000
  • 🏠 Its numerical neighbours: 98239 (Coupeville, WA, 52 mi away) and 98241 (Darrington, WA, 85 mi away).
  • 🔄 Backwards, 98240 becomes 04289 — and that is a real ZIP code: West Paris, ME, 2,443 miles away.
  • 👥 51 other ZIP codes are made of exactly the same digits (02894, 04289, 04928, 04982, 09248, 09824, …). The farthest-flung twin is 09824 in APO AE, a military post office, 6,346 miles away.
  • 🧭 Farther north than 98% of all ZIP codes, and farther west than 97%.
  • 🎯1,336 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 98240 and you would come out at 48.95°S, 57.38°E — 580 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 16h 12m of daylight. Shortest: 8h 14m.
  • 📏 At 22.3 square miles of land, 98240 is bigger than 39% of ZIP codes — room for about 17 Central Parks.
🌙 The sky over 98240 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population3,593This ZIP3,593
Households1,265This ZIP1,265
Housing units1,345This ZIP1,345
Median age36.9This ZIP36.9Washington38.3US 38.9
Median household income$110,116This ZIP$110,116Washington$98,141US $80,734
Median home value$619,700This ZIP$619,700Washington$564,600US $332,700
Bachelor's degree or higher23.6%This ZIP23.6%
Mean commute19.8 minThis ZIP19.8 min
Population density161.4 / sq miThis ZIP161.4 / sq mi

Business and tax activity

Business establishments71This ZIP71
Employees381This ZIP381
Annual payroll$17,687,000This ZIP$17,687,000
Tax returns filed1,600This ZIP1,600
Total adjusted gross income$130,723,000This ZIP$130,723,000

Land area

Land area22.26 sq miThis ZIP22.26 sq mi
Water area0.02 sq miThis ZIP0.02 sq mi

Other place names in 98240

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

ZIP codes near 98240

ZIPCityDistance
98230 Blaine, WA 3.8 mi
98248 Ferndale, WA 5.7 mi
98231 Blaine, WA 6.5 mi
98264 Lynden, WA 7.5 mi
98226 Bellingham, WA 13.5 mi
98276 Nooksack, WA 13.7 mi
98225 Bellingham, WA 14.1 mi
98227 Bellingham, WA 14.4 mi
98228 Bellingham, WA 14.4 mi
98247 Everson, WA 14.4 mi

Find every ZIP code within 10 miles of 98240 →

Questions about this ZIP code

Where is ZIP code 98240?

98240 is in Custer, Washington, in Whatcom County, part of the Bellingham, WA metropolitan area. Its published point location is 48.9482, -122.6207.

What county is 98240 in?

98240 lies in Whatcom County.

What time zone is 98240 in?

98240 uses America/Los_Angeles.

How many people live in 98240?

About 3,593 people live in ZIP code 98240, in 1,265 households, at 161.4 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 98240?

$110,116 a year, against $98,141 across Washington.

What ZIP codes are near 98240?

The closest are 98230 (3.8 mi), 98248 (5.7 mi), 98231 (6.5 mi), 98264 (7.5 mi) and 98226 (13.5 mi).

Is 98240 a PO Box ZIP code?

98240 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “98240 ZIP Code — Custer, Washington (Whatcom County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/98240

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