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zipcodes.pro — ZIP/98581

98581

ZIP 98581 is Ryderwood, Washington, in Cowlitz County; area codes 360 and 564; Pacific time.

Type
Standard
Time zone
America/Los_Angeles
County
Cowlitz
Metro area
Longview-Kelso, WA
Population
419
Coordinates
46.3588, -123.0687
☼ Live from 98581 — Ryderwood, WA

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Local time: —

Where 98581 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 98581
  • 🔢 Type 98581 into a pocket calculator and turn it upside down: IBSBG — not quite a word, sorry.
  • ➕ As a number, 98,581 = 7 × 14083. Its digits add up to 31, a total 799 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 11000000100010101
  • 🏠 Its numerical neighbours: 98580 (Roy, WA, 51 mi away) and 98582 (Salkum, WA, 24 mi away).
  • 🔄 Backwards, 98581 becomes 18589, which is not a ZIP code at all.
  • 👥 11 other ZIP codes are made of exactly the same digits (18958, 19885, 88519, 89158, 89185, 89815, …). The farthest-flung twin is 19885 in Wilmington, DE, 2,405 miles away.
  • 🧭 Farther north than 94% of all ZIP codes, and farther west than 98%.
  • 🎯1,309 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 98581 and you would come out at 46.36°S, 56.93°E — 649 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 48m of daylight. Shortest: 8h 35m.
  • 📏 At 29.2 square miles of land, 98581 is bigger than 45% of ZIP codes — room for about 22 Central Parks.
🌙 The sky over 98581 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population419This ZIP419
Households251This ZIP251
Housing units251This ZIP251
Median age72.1This ZIP72.1Washington38.3US 38.9
Median household income$43,009This ZIP$43,009Washington$98,141US $80,734
Median home value$232,500This ZIP$232,500Washington$564,600US $332,700
Bachelor's degree or higher15.8%This ZIP15.8%
Mean commute32.0 minThis ZIP32.0 min
Population density14.4 / sq miThis ZIP14.4 / sq mi

Business and tax activity

Tax returns filed190This ZIP190
Total adjusted gross income$9,553,000This ZIP$9,553,000

Land area

Land area29.16 sq miThis ZIP29.16 sq mi
Water area0.00 sq mi

Other place names in 98581

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

ZIP codes near 98581

ZIPCityDistance
98593 Vader, WA 4.1 mi
98611 Castle Rock, WA 8.8 mi
98538 Curtis, WA 9.3 mi
98632 Longview, WA 10.6 mi
98596 Winlock, WA 10.8 mi
98612 Cathlamet, WA 12.8 mi
98645 Silverlake, WA 14.8 mi
98647 Skamokawa, WA 16.2 mi
98591 Toledo, WA 16.4 mi
98565 Napavine, WA 17.0 mi

Find every ZIP code within 10 miles of 98581 →

Questions about this ZIP code

Where is ZIP code 98581?

98581 is in Ryderwood, Washington, in Cowlitz County, part of the Longview-Kelso, WA metropolitan area. Its published point location is 46.3588, -123.0687.

What county is 98581 in?

98581 lies in Cowlitz County.

What area code is 98581?

Ryderwood uses area codes 360 and 564, from NANPA's telephone records.

What time zone is 98581 in?

98581 uses America/Los_Angeles.

How many people live in 98581?

About 419 people live in ZIP code 98581, in 251 households, at 14.4 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 98581?

$43,009 a year, against $98,141 across Washington.

What ZIP codes are near 98581?

The closest are 98593 (4.1 mi), 98611 (8.8 mi), 98538 (9.3 mi), 98632 (10.6 mi) and 98596 (10.8 mi).

Is 98581 a PO Box ZIP code?

98581 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “98581 ZIP Code — Ryderwood, Washington (Cowlitz County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/98581

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