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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/99101

99101

ZIP 99101 is Addy, Washington, in Stevens County; area code 509; Pacific time.

Type
Standard
Time zone
America/Los_Angeles
County
Stevens
Population
1,690
Coordinates
48.3164, -117.9373
☼ Live from 99101 — Addy, WA

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Local time: —

Where 99101 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 99101
  • 🔢 Type 99101 into a pocket calculator and turn it upside down: IOIGG — not quite a word, sorry.
  • ➕ As a number, 99,101 = 113 × 877. Its digits add up to 20, a total 2,586 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 11000001100011101
  • 🏠 Its numerical neighbours: 99040 (Wellpinit, WA, 29 mi away) and 99102 (Albion, WA, 110 mi away).
  • 🔄 Backwards, 99101 becomes 10199 — and that is a real ZIP code: New York, NY, 2,194 miles away.
  • 👥 13 other ZIP codes are made of exactly the same digits (01199, 10199, 10919, 19019, 19091, 19109, …). The farthest-flung twin is 01199 in Springfield, MA, 2,214 miles away.
  • 🧭 Farther north than 98% of all ZIP codes, and farther west than 91%.
  • 🎯1,121 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 99101 and you would come out at 48.32°S, 62.06°E — 378 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 16h 06m of daylight. Shortest: 8h 19m.
  • 📏 At 95.4 square miles of land, 99101 is bigger than 77% of ZIP codes — room for about 72 Central Parks.
🌙 The sky over 99101 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population1,690This ZIP1,690
Households618This ZIP618
Housing units731This ZIP731
Median age43.7This ZIP43.7Washington38.3US 38.9
Median household income$78,750This ZIP$78,750Washington$98,141US $80,734
Median home value$434,800This ZIP$434,800Washington$564,600US $332,700
Bachelor's degree or higher25.0%This ZIP25.0%
Mean commute25.9 minThis ZIP25.9 min
Population density17.7 / sq miThis ZIP17.7 / sq mi

Business and tax activity

Business establishments24This ZIP24
Employees78This ZIP78
Annual payroll$4,203,000This ZIP$4,203,000
Tax returns filed640This ZIP640
Total adjusted gross income$38,956,000This ZIP$38,956,000

Land area

Land area95.37 sq miThis ZIP95.37 sq mi
Water area0.09 sq miThis ZIP0.09 sq mi

Other place names in 99101

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

ZIP codes near 99101

ZIPCityDistance
99131 Gifford, WA 7.4 mi
99109 Chewelah, WA 11.1 mi
99167 Rice, WA 11.2 mi
99181 Valley, WA 14.2 mi
99137 Hunters, WA 14.2 mi
99173 Springdale, WA 19.4 mi
99138 Inchelium, WA 21.7 mi
99148 Loon Lake, WA 22.2 mi
99129 Fruitland, WA 23.4 mi
99151 Marcus, WA 24.7 mi

Find every ZIP code within 10 miles of 99101 →

Questions about this ZIP code

Where is ZIP code 99101?

99101 is in Addy, Washington, in Stevens County, part of the Spokane-Spokane Valley, WA metropolitan area. Its published point location is 48.3164, -117.9373.

What county is 99101 in?

99101 lies in Stevens County.

What area code is 99101?

Addy uses area code 509, from NANPA's telephone records.

What time zone is 99101 in?

99101 uses America/Los_Angeles.

How many people live in 99101?

About 1,690 people live in ZIP code 99101, in 618 households, at 17.7 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 99101?

$78,750 a year, against $98,141 across Washington.

What ZIP codes are near 99101?

The closest are 99131 (7.4 mi), 99109 (11.1 mi), 99167 (11.2 mi), 99181 (14.2 mi) and 99137 (14.2 mi).

Is 99101 a PO Box ZIP code?

99101 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “99101 ZIP Code — Addy, Washington (Stevens County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/99101

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