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/CO/COUNTY/WASHINGTON

Washington County, CO ZIP codes

Washington County, CO has 6 ZIP codes, in 6 towns: 80720, 80743, 80812, 80740, 80757 and 80801. 1 more crosses into it from a neighbouring county: 80815.

The county seat is Akron.

ZIP codes
6
Partly in it
1 more
Towns
6
County seat
Akron
County FIPS
08121
Population
4,831
Median household income
$67,167
Land area
2,518 sq mi

Washington County ZIP codes by town

Akron (county seat)
80720

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.

ZIP codes partly in Washington County

This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Washington County.

Map of Washington County ZIP codes

807208074080743807578080180812

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 4,831 people live in Washington County, in 2,070 households, the 53rd most populous of Colorado's 64 counties. The median household income is $67,167 a year, 30% below the Colorado median of $95,470 (US: $80,734). The median owner-occupied home is valued at $226,200 (58% below the Colorado median), and median gross rent is $947 a month. The median age is 41.3; 24.9% of adults 25 and over hold a bachelor's degree or higher (45.7% across Colorado); the average commute takes 23 minutes.

Population4,831Washington4,831
Households2,070Washington2,070
Median age41.3Washington41.3Colorado37.7US 38.9
Median household income$67,167Washington$67,167Colorado$95,470US $80,734
Median home value$226,200Washington$226,200Colorado$539,400US $332,700
Median gross rent$947Washington$947Colorado$1,761US $1,413
Bachelor's degree or higher24.9%Washington24.9%Colorado45.7%US 35.7%
Mean commute22.9 minWashington22.9 minColorado25.2 minUS 26.4 min
Population density2 / sq miWashington2 / 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
Akron 1 1,722
Otis 1 521
Woodrow 1 216
Anton 1 100
Lindon 1 94
Cope 1 58

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
80720 Akron , CO Standard 2,247 $65,913 $219,100
80740 Lindon , CO Standard 94 $38,056 $235,000
80743 Otis , CO Standard 1,333 $67,734 $226,300
80757 Woodrow , CO Standard 216 $53,438 $254,200
80801 Anton , CO Standard 100 $22,813 $254,200
80812 Cope , CO Standard 298 $69,844 $187,500

Cite this page

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

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