Washington County, Missouri Zip Codes

Zip Code	City	Population
63664	Potosi	9,039
63660	Mineral Point	3,647
63630	Cadet	3,512
63071	Richwoods	1,353
63648	Irondale	1,282
63626	Blackwell	941
63631	Caledonia	774
63622	Belgrade	726
63030	Fletcher	289
63674	Tiff	24

Population is the most recent figure from the U.S. Census Bureau's 2022 American Community Survey (ACS) 5-Year Estimates.