Washington County ZIP Codes

List of ZIP Codes in Washington County

The following table lists ZIP Codes associated with Washington County, Missouri, based on ZIP Code Tabulation Area (ZCTA) data from the U.S. Census Bureau.

S.N.	Zip Code	Latitude	Longitude	City	Population	Density
1	63030	38.14321	-90.7522	Fletcher	364	17.6
2	63071	38.15635	-90.82558	Richwoods	1,315	13.1
3	63622	37.78901	-90.90584	Belgrade	782	6.6
4	63626	38.07721	-90.71471	Blackwell	694	12.6
5	63630	38.01874	-90.72727	Cadet	3,765	21.5
6	63631	37.74912	-90.78873	Caledonia	687	6.4
7	63648	37.8187	-90.69878	Irondale	1,483	18.3
8	63660	37.91241	-90.70241	Mineral Point	3,489	38.3
9	63664	37.92161	-90.91661	Potosi	9,060	12.2
10	63674	38.03126	-90.65933	Tiff	53	7.1

About Washington County ZIP Codes

Washington County in Missouri (MO) is served by approximately 10 ZIP Codes. These codes cover residential neighborhoods, business districts, and rural areas that fall under the county's jurisdiction.

Based on ZIP-level population estimates, the total population covered by these ZIP Codes is around 21,692 people. Population and density values vary from one ZIP Code to another, reflecting the mix of dense urban communities and lower-density suburban or rural zones.

Many of the most significant population centers in Washington County are located in cities such as Potosi, Cadet, Mineral Point, Irondale, Richwoods. These cities and towns help define the economic and demographic character of the county.

Most ZIP Codes in Washington County, Missouri follow the America/Chicago time zone.

Washington County ZIP Codes

List of ZIP Codes in Washington County

About Washington County ZIP Codes

Missouri Counties ZIP Codes

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