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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/99346

99346

ZIP 99346 is Plymouth, Washington, in Benton County; area code 509; Pacific time.

Type
Standard
Time zone
America/Los_Angeles
County
Benton
Population
198
Coordinates
46.0307, -119.3032
☼ Live from 99346 — Plymouth, WA

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Local time: —

Where 99346 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 99346
  • 🔢 Type 99346 into a pocket calculator and turn it upside down: ghEGG — not quite a word, sorry.
  • ➕ As a number, 99,346 = 2 × 13 × 3821. Its digits add up to 31, a total 799 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 11000010000010010
  • 🏠 Its numerical neighbours: 99345 (Paterson, WA, 18 mi away) and 99347 (Pomeroy, WA, 87 mi away).
  • 🔄 Backwards, 99346 becomes 64399, which is not a ZIP code at all.
  • 👥 12 other ZIP codes are made of exactly the same digits (34996, 39649, 43699, 46939, 49639, 49963, …). The farthest-flung twin is 96943 in Yap, FM, 5,825 miles away.
  • 🧭 Farther north than 94% of all ZIP codes, and farther west than 93%.
  • 🎯1,128 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 99346 and you would come out at 46.03°S, 60.70°E — 498 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 45m of daylight. Shortest: 8h 38m.
  • 📏 At 142.9 square miles of land, 99346 is bigger than 85% of ZIP codes — room for about 108 Central Parks.
🌙 The sky over 99346 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population198This ZIP198
Households75This ZIP75
Housing units75This ZIP75
Median age55.8This ZIP55.8Washington38.3US 38.9
Median household income$50,865This ZIP$50,865Washington$98,141US $80,734
Median home value$209,200This ZIP$209,200Washington$564,600US $332,700
Bachelor's degree or higher16.7%This ZIP16.7%
Mean commute20.2 minThis ZIP20.2 min
Population density1.4 / sq miThis ZIP1.4 / sq mi

Business and tax activity

Business establishments7This ZIP7
Employees114This ZIP114
Annual payroll$11,186,000This ZIP$11,186,000

Land area

Land area142.89 sq miThis ZIP142.89 sq mi
Water area3.89 sq miThis ZIP3.89 sq mi

ZIP codes near 99346

ZIPCityDistance
97882 Umatilla, OR 8.8 mi
99337 Kennewick, WA 9.9 mi
99338 Kennewick, WA 10.0 mi
97838 Hermiston, OR 12.4 mi
99336 Kennewick, WA 14.1 mi
99352 Richland, WA 14.9 mi
97844 Irrigon, OR 15.5 mi
97875 Stanfield, OR 16.6 mi
99302 Pasco, WA 17.3 mi
99345 Paterson, WA 18.2 mi

Find every ZIP code within 10 miles of 99346 →

Questions about this ZIP code

Where is ZIP code 99346?

99346 is in Plymouth, Washington, in Benton County, part of the Kennewick-Richland, WA metropolitan area. Its published point location is 46.0307, -119.3032.

What county is 99346 in?

99346 lies in Benton County.

What area code is 99346?

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

What time zone is 99346 in?

99346 uses America/Los_Angeles.

How many people live in 99346?

About 198 people live in ZIP code 99346, in 75 households, at 1.4 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 99346?

$50,865 a year, against $98,141 across Washington.

What ZIP codes are near 99346?

The closest are 97882 (8.8 mi), 99337 (9.9 mi), 99338 (10 mi), 97838 (12.4 mi) and 99336 (14.1 mi).

Is 99346 a PO Box ZIP code?

99346 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “99346 ZIP Code — Plymouth, Washington (Benton County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/99346

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