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zipcodes.pro — ZIP/99111

99111

ZIP 99111 is Colfax, Washington, in Whitman County; area code 509; Pacific time.

Type
Standard
Time zone
America/Los_Angeles
County
Whitman
Metro area
Pullman, WA
Population
4,038
Coordinates
46.8559, -117.4512
☼ Live from 99111 — Colfax, WA

Weather right now

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NEXRAD radar
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Local time: —

Where 99111 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 99111
  • 🔢 Type 99111 into a pocket calculator and turn it upside down: IIIGG — not quite a word, sorry.
  • ➕ As a number, 99,111 = 3 × 33037. Its digits add up to 21, a total 2,594 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 11000001100100111
  • 🏠 Its numerical neighbours: 99110 (Clayton, WA, 80 mi away) and 99113 (Colton, WA, 22 mi away).
  • 🔄 Backwards, 99111 becomes 11199, which is not a ZIP code at all.
  • 👥 3 other ZIP codes are made of exactly the same digits (19119, 19191, 91911). The farthest-flung twin is 19191 in Philadelphia, PA, 2,148 miles away.
  • 🧭 Farther north than 95% of all ZIP codes, and farther west than 90%.
  • 🎯1,062 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 99111 and you would come out at 46.86°S, 62.55°E — 393 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 53m of daylight. Shortest: 8h 31m.
  • 📏 At 307.0 square miles of land, 99111 is bigger than 95% of ZIP codes — room for about 233 Central Parks.
🌙 The sky over 99111 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population4,038This ZIP4,038
Households1,714This ZIP1,714
Housing units1,932This ZIP1,932
Median age41.8This ZIP41.8Washington38.3US 38.9
Median household income$73,393This ZIP$73,393Washington$98,141US $80,734
Median home value$295,800This ZIP$295,800Washington$564,600US $332,700
Median gross rent$953This ZIP$953Washington$1,760US $1,413
Bachelor's degree or higher30.5%This ZIP30.5%
Mean commute17.8 minThis ZIP17.8 min
Population density13.2 / sq miThis ZIP13.2 / sq mi

Business and tax activity

Business establishments134This ZIP134
Employees1,348This ZIP1,348
Annual payroll$82,995,000This ZIP$82,995,000
Tax returns filed1,900This ZIP1,900
Total adjusted gross income$150,747,000This ZIP$150,747,000

Land area

Land area306.99 sq miThis ZIP306.99 sq mi
Water area0.10 sq miThis ZIP0.10 sq mi

Other place names in 99111

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

ZIP codes near 99111

ZIPCityDistance
99102 Albion, WA 10.5 mi
99174 Steptoe, WA 11.4 mi
99163 Pullman, WA 14.0 mi
99161 Palouse, WA 14.7 mi
99164 Pullman, WA 15.5 mi
99125 Endicott, WA 15.8 mi
99130 Garfield, WA 16.0 mi
99176 Thornton, WA 16.4 mi
99171 Saint John, WA 19.3 mi
99143 Lacrosse, WA 19.8 mi

Find every ZIP code within 10 miles of 99111 →

Questions about this ZIP code

Where is ZIP code 99111?

99111 is in Colfax, Washington, in Whitman County, part of the Pullman, WA micropolitan area. Its published point location is 46.8559, -117.4512.

What county is 99111 in?

99111 lies in Whitman County.

What area code is 99111?

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

What time zone is 99111 in?

99111 uses America/Los_Angeles.

How many people live in 99111?

About 4,038 people live in ZIP code 99111, in 1,714 households, at 13.2 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 99111?

$73,393 a year, against $98,141 across Washington.

What ZIP codes are near 99111?

The closest are 99102 (10.5 mi), 99174 (11.4 mi), 99163 (14 mi), 99161 (14.7 mi) and 99164 (15.5 mi).

Is 99111 a PO Box ZIP code?

99111 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “99111 ZIP Code — Colfax, Washington (Whitman County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/99111

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