Washington County, Missouri

Browse all ZIP codes in Washington County, Missouri. Each ZIP code page includes population, median household income, and a map of the area.

County Statistics

Total Population 21,587
Median Household Income $50,582
Median Age 39.7
Unemployment Rate 3.8%
Poverty Rate 18.5%
ZIP Codes 10

Largest ZIP Codes in Washington County

ZIP Code City Population Median Income
63664Potosi9,039$53,967
63660Mineral Point3,647$50,417
63630Cadet3,512$48,256
63071Richwoods1,353$38,352
63648Irondale1,282$34,658

Demographics

Race & Ethnicity

Gender

Education Level (adults 25+)

All ZIP Codes in Washington County