Zip Code 63664 — Potosi, MO

ZIP Code 63664 is associated with Potosi, MO, in Washington County. The listed population estimate is 9,693; estimated density is 13.0 people per square mile. Among records with population estimates, it ranks #1 of 10 in Washington County and #193 of 1,021 in MO.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (37.921610, -90.916610)

Data MetricLocal Statistic
Postal / Zip Code63664
Primary CityPotosi
State / ProvinceMO
CountyWashington
Total Population9,693
Population Density13.0 people/sq mi
TimezoneAmerica/Chicago

How 63664 Compares

MetricZIP 63664Washington County recordsMO records
Population estimate9,69321,955 (sum)6,191,989 (sum)
Population Density13.0 /sq mi----
County population rank#1 of 10----
State population rank#193 of 1,021----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in MO

ZIP CodeCityDistancePopulation estimate
ZIP 63622Belgrade9.2 mi764
ZIP 63660Mineral Point11.7 mi2,784
ZIP 63630Cadet12.3 mi4,006
ZIP 63631Caledonia13.8 mi544
ZIP 63648Irondale13.8 mi1,858

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →