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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/99203

99203

ZIP 99203 is in Spokane, Washington, in Spokane County; area code 509; Pacific time. Spokane has 28 ZIP codes in all.

Type
Standard
Time zone
America/Los_Angeles
County
Spokane
Population
21,468
Coordinates
47.6296, -117.4032
☼ Live from 99203 — Spokane, WA

Weather right now

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Where 99203 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 99203
  • 🔢 Type 99203 into a pocket calculator and turn it upside down: EOZGG — not quite a word, sorry.
  • ➕ As a number, 99,203 = 13 × 13 × 587. Its digits add up to 23, a total 2,533 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 11000001110000011
  • 🏠 Its numerical neighbours: 99202 (Spokane, WA, 2 mi away) and 99204 (Spokane, WA, 2 mi away).
  • 🔄 Backwards, 99203 becomes 30299, which is not a ZIP code at all.
  • 👥 22 other ZIP codes are made of exactly the same digits (03299, 09239, 20993, 23909, 29039, 29903, …). The farthest-flung twin is 09239 in APO AE, a military post office, 5,052 miles away.
  • 🧭 Farther north than 97% of all ZIP codes, and farther west than 90%.
  • 🎯1,079 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 99203 and you would come out at 47.63°S, 62.60°E — 369 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.
  • 📏 At 4.6 square miles of land, 99203 is bigger than 18% of ZIP codes — room for about 3.5 Central Parks.
🌙 The sky over 99203 today
  • Working out the sun…
🌋 Shake report
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Source: USGS.

People and housing

Population21,468This ZIP21,468
Households9,224This ZIP9,224
Housing units9,676This ZIP9,676
Median age43.4This ZIP43.4Washington38.3US 38.9
Median household income$104,372This ZIP$104,372Washington$98,141US $80,734
Median home value$483,300This ZIP$483,300Washington$564,600US $332,700
Median gross rent$1,274This ZIP$1,274Washington$1,760US $1,413
Bachelor's degree or higher60.4%This ZIP60.4%
Mean commute19.7 minThis ZIP19.7 min
Population density4,620.7 / sq miThis ZIP4,620.7 / sq mi

Business and tax activity

Business establishments361This ZIP361
Employees2,782This ZIP2,782
Annual payroll$118,603,000This ZIP$118,603,000
Tax returns filed10,370This ZIP10,370
Total adjusted gross income$1,313,151,000This ZIP$1,313,151,000

Land area

Land area4.65 sq miThis ZIP4.65 sq mi
Water area0.01 sq miThis ZIP0.01 sq mi

Other place names in 99203

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

ZIP codes near 99203

ZIPCityDistance
99204 Spokane, WA 1.6 mi
99210 Spokane, WA 2.1 mi
99211 Spokane, WA 2.1 mi
99214 Spokane, WA 2.1 mi
99215 Spokane, WA 2.1 mi
99219 Spokane, WA 2.1 mi
99220 Spokane, WA 2.1 mi
99228 Spokane, WA 2.1 mi
99252 Spokane, WA 2.1 mi
99256 Spokane, WA 2.1 mi

Find every ZIP code within 10 miles of 99203 →

Questions about this ZIP code

Where is ZIP code 99203?

99203 is in Spokane, Washington, in Spokane County, part of the Spokane-Spokane Valley, WA metropolitan area. Its published point location is 47.6296, -117.4032.

What county is 99203 in?

99203 lies in Spokane County.

What area code is 99203?

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

What time zone is 99203 in?

99203 uses America/Los_Angeles.

How many people live in 99203?

About 21,468 people live in ZIP code 99203, in 9,224 households, at 4,620.7 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 99203?

$104,372 a year, against $98,141 across Washington.

What ZIP codes are near 99203?

The closest are 99204 (1.6 mi), 99210 (2.1 mi), 99211 (2.1 mi), 99214 (2.1 mi) and 99215 (2.1 mi).

Is 99203 a PO Box ZIP code?

99203 is a standard ZIP code. A normal ZIP code with street delivery.

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zipcodes.pro. “99203 ZIP Code — Spokane, Washington (Spokane County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/99203

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