Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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 — STATE/ID/COUNTY/WASHINGTON

Washington County, ID ZIP codes

Washington County, ID has 3 ZIP codes, in 3 towns: 83672, 83610 and 83645.

The county seat is Weiser.

ZIP codes
3
Towns
3
County seat
Weiser
County FIPS
16087
State
Idaho
Population
11,142
Median household income
$54,000
Land area
1,453 sq mi

Washington County ZIP codes by town

Weiser (county seat)
83672

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of Washington County ZIP codes

836108364583672

The ZIP codes of Washington County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Washington County in numbers

About 11,142 people live in Washington County, in 4,202 households, the 29th most populous of Idaho's 44 counties. The median household income is $54,000 a year, 31% below the Idaho median of $77,800 (US: $80,734). The median owner-occupied home is valued at $278,100 (34% below the Idaho median), and median gross rent is $938 a month. The median age is 45.0; 20.6% of adults 25 and over hold a bachelor's degree or higher (31.8% across Idaho); the average commute takes 19 minutes.

Population11,142Washington11,142
Households4,202Washington4,202
Median age45.0Washington45.0Idaho37.3US 38.9
Median household income$54,000Washington$54,000Idaho$77,800US $80,734
Median home value$278,100Washington$278,100Idaho$418,600US $332,700
Median gross rent$938Washington$938Idaho$1,238US $1,413
Bachelor's degree or higher20.6%Washington20.6%Idaho31.8%US 35.7%
Mean commute18.6 minWashington18.6 minIdaho21.6 minUS 26.4 min
Population density8 / sq miWashington8 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Washington County

Largest towns in Washington County
TownZIP codesPopulation
Weiser 1 5,935
Midvale 1 347
Cambridge 1 324

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Washington County.

Not sure you are in Washington County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Washington County, with figures

ZIP codes in Washington County
ZIP City Type Population Median income Median home
83610 Cambridge , ID Standard 992 $65,625 $279,200
83645 Midvale , ID Standard 970 $65,417 $315,700
83672 Weiser , ID Standard 9,176 $51,045 $272,800

Cite this page

zipcodes.pro. “Washington County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/id/county/washington

Underlying data is public domain or openly licensed — sources, vintages and licences.