ZIP code · Potosi · Missouri · United States

ZIP code 63664 — Potosi

ZIP code 63664 serves Potosi, Missouri.

Postal code
63664
Single source Value from one source, not cross-checked.
City
Potosi
County
Washington FIPS 29221
State
Missouri
Country
United States
Coordinates
37.9549, -90.8415 — precision precise (locality)
View on OpenStreetMap
Population
9,060 (ZCTA, ACS 5-year)
Population density
31 / sq mi
Land area
287.7 sq mi (745.1 km²) (ZCTA, ACS 5-year)
Median household income
$52,071
Per-capita income
$27,320
Median age
39.9
Households
3,496
Housing units
3,961
Median home value
$122,800
Median gross rent
$659 / month
Congressional district
MO-3 (119th Congress)
USDA hardiness zone
6b (-5 to 0 °F)
Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
Time zone
America/Chicago (UTC−6 / UTC−5 DST)
Area code
573
Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.

Climate — monthly normals

Warmest month Jul (avg high 86°F), coldest Jan (avg low 21°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F404555667482868578685443
Avg low °F212534445463676557463526
Precip in2.82.74.15.15.34.23.64.03.93.13.73.0

NOAA 1991–2020 climate normals from the nearest station: POTOSI 4 SW (4.1 mi) · NOAA NCEI

Places in ZIP 63664

Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology

About this page

US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.

GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page