ZIP Code 63664

63664 is one of Missouri's ZIP codes, delivering to addresses in Potosi, Washington County.

City: Potosi
County: Washington County
State: Missouri
Prefix: 636xx

Where this code sits

63664 is part of the 636xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Potosi.

Potosi Missouri ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 63664 delivers to without sharing its boundary.

ZIP codes nearest 63664

The ZIP codes whose reference points sit closest to 63664.
ZIP code	Distance	Delivers to
ZIP code 63630	6.6 mi	Cadet, MO
ZIP code 63660	7.2 mi	Mineral Point, MO
ZIP code 63674	11 mi	Tiff, MO
ZIP code 63622	12 mi	Belgrade, MO
ZIP code 63648	12 mi	Irondale, MO
ZIP code 63071	14 mi	Richwoods, MO
ZIP code 63626	14 mi	Blackwell, MO
ZIP code 63631	14 mi	Caledonia, MO

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 63664, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 63664. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.