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 — CITY/MO/WASHINGTON

Washington ZIP code, Missouri

The ZIP code for Washington, MO is 63090, and its area code is 636.

USPS city name
1 ZIP code
Population
15,130
Area code
636

Washington in numbers

About 15,130 people live in Washington, in 6,702 households. The median household income is $79,173 a year, 12% above the Missouri median of $70,702 (US: $80,734). The median owner-occupied home is valued at $231,800 (about the same as the Missouri median), and median gross rent is $827 a month. The median age is 43.1; 32.3% of adults 25 and over hold a bachelor's degree or higher (32.4% across Missouri); the average commute takes 21 minutes.

Population15,130Washington15,130
Households6,702Washington6,702
Median age43.1Washington43.1Missouri39.0US 38.9
Median household income$79,173Washington$79,173Missouri$70,702US $80,734
Median home value$231,800Washington$231,800Missouri$230,300US $332,700
Median gross rent$827Washington$827Missouri$1,033US $1,413
Bachelor's degree or higher32.3%Washington32.3%Missouri32.4%US 35.7%
Mean commute21.1 minWashington21.1 minMissouri23.5 minUS 26.4 min
Population density1,510 / sq miWashington1,510 / sq mi

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

ZIP codes addressed as Washington

ZIP codes with the USPS city name Washington
ZIP City Type Population Median income Median home
63090 Washington , MO Standard 23,258 $85,025 $273,600

Map of Washington ZIP codes

63090

The ZIP codes of Washington, MO, 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.

Towns near Washington

The nearest larger towns are Wildwood (35,133 people, 19 mi), Wentzville (47,061 people, 20 mi) and Lake St. Louis (18,066 people, 20 mi).

Towns near Washington
TownPopulationDistance
Union 12,781 8.0 mi
Villa Ridge 2,835 9.3 mi
Gray Summit 2,991 10.8 mi
New Haven 3,302 11.5 mi
St. Clair 4,789 14.2 mi
Pacific 7,475 15.2 mi
Wildwood 35,133 18.9 mi
Wright City 5,240 19.4 mi
Warrenton 9,066 19.6 mi
Wentzville 47,061 19.9 mi
Lake St. Louis 18,066 20.0 mi
Eureka 13,081 20.3 mi
Dardenne Prairie 13,503 20.8 mi
Weldon Spring 5,310 22.4 mi

More nearby: every ZIP code in Franklin County · Missouri ZIP codes

Cite this page

zipcodes.pro. “Washington, MO ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/mo/washington

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