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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/99338

99338

ZIP 99338 is in Kennewick, Washington, in Benton County; area code 509; Pacific time. Kennewick has 3 ZIP codes; the others are 99336 and 99337.

Type
Standard
Time zone
America/Los_Angeles
County
Benton
Population
20,633
Coordinates
46.1736, -119.2740
☼ Live from 99338 — Kennewick, WA

Weather right now

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Local time: —

Where 99338 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 99338
  • 🔢 Type 99338 into a pocket calculator and turn it upside down: BEEGG — not quite a word, sorry.
  • ➕ As a number, 99,338 = 2 × 49669. Its digits add up to 32, a total 644 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 11000010000001010
  • 🏠 Its numerical neighbours: 99337 (Kennewick, WA, 12 mi away) and 99341 (Lind, WA, 59 mi away).
  • 🔄 Backwards, 99338 becomes 83399, which is not a ZIP code at all.
  • 👥 5 other ZIP codes are made of exactly the same digits (93389, 98339, 98393, 98933, 99833). The farthest-flung twin is 99833 in Petersburg, AK, 946 miles away.
  • 🧭 Farther north than 94% of all ZIP codes, and farther west than 93%.
  • 🎯1,130 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 99338 and you would come out at 46.17°S, 60.73°E — 492 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 47m of daylight. Shortest: 8h 37m.
  • 📏 At 35.5 square miles of land, 99338 is bigger than 50% of ZIP codes — room for about 27 Central Parks.
🌙 The sky over 99338 today
  • Working out the sun…
🌋 Shake report
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Source: USGS.

People and housing

Population20,633This ZIP20,633
Households6,937This ZIP6,937
Housing units7,192This ZIP7,192
Median age37.6This ZIP37.6Washington38.3US 38.9
Median household income$111,042This ZIP$111,042Washington$98,141US $80,734
Median home value$551,500This ZIP$551,500Washington$564,600US $332,700
Median gross rent$1,486This ZIP$1,486Washington$1,760US $1,413
Bachelor's degree or higher39.3%This ZIP39.3%
Mean commute21.8 minThis ZIP21.8 min
Population density582.0 / sq miThis ZIP582.0 / sq mi

Business and tax activity

Business establishments346This ZIP346
Employees3,543This ZIP3,543
Annual payroll$239,621,000This ZIP$239,621,000
Tax returns filed9,210This ZIP9,210
Total adjusted gross income$1,192,419,000This ZIP$1,192,419,000

Land area

Land area35.45 sq miThis ZIP35.45 sq mi
Water area0.00 sq mi

Other place names in 99338

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

ZIP codes near 99338

ZIPCityDistance
99352 Richland, WA 5.1 mi
99336 Kennewick, WA 5.5 mi
99302 Pasco, WA 9.6 mi
99346 Plymouth, WA 10.0 mi
99354 Richland, WA 10.8 mi
99353 West Richland, WA 11.1 mi
99337 Kennewick, WA 11.9 mi
99320 Benton City, WA 15.2 mi
97882 Umatilla, OR 18.8 mi
99323 Burbank, WA 19.3 mi

Find every ZIP code within 10 miles of 99338 →

Questions about this ZIP code

Where is ZIP code 99338?

99338 is in Kennewick, Washington, in Benton County, part of the Kennewick-Richland, WA metropolitan area. Its published point location is 46.1736, -119.2740.

What county is 99338 in?

99338 lies in Benton County.

What area code is 99338?

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

What time zone is 99338 in?

99338 uses America/Los_Angeles.

How many people live in 99338?

About 20,633 people live in ZIP code 99338, in 6,937 households, at 582.0 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 99338?

$111,042 a year, against $98,141 across Washington.

What ZIP codes are near 99338?

The closest are 99352 (5.1 mi), 99336 (5.5 mi), 99302 (9.6 mi), 99346 (10 mi) and 99354 (10.8 mi).

Is 99338 a PO Box ZIP code?

99338 is a standard ZIP code. A normal ZIP code with street delivery.

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zipcodes.pro. “99338 ZIP Code — Kennewick, Washington (Benton County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/99338

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