Washington, MO ZIP code
The ZIP code for Washington, Missouri is 63090. It is in Franklin County.
- Population in these ZIPs
- 23,258
- Avg. median income
- $85,000population-weighted
- Typical home value
- $303,500population-weighted
- Metro area
- St. Louis, MO-IL
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Washington, MO ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 63090 | 23,258 | $85,025 | $303,500 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Washington
- Union 8 mi
- Marthasville 8 mi
- Augusta 9 mi
- Villa Ridge 11 mi
- Beaufort 11 mi
- New Haven 11 mi
- Gray Summit 11 mi
- Labadie 12 mi
- Leslie 13 mi
- Saint Clair 15 mi
- New Melle 15 mi
- Saint Albans 15 mi
Frequently asked questions
What is the ZIP code for Washington, MO?
The ZIP code for Washington, MO is 63090.
What county is Washington, Missouri in?
Washington ZIP codes are in Franklin County.