Uniontown Washington ZIP Codes

Uniontown holds a single ZIP code.

Every ZIP code in Uniontown

The complete list of Uniontown, Washington ZIP codes with the county each falls in.
ZIP code	County
99179	Whitman County

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Uniontown codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Uniontown. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.

How these codes cluster

Every Uniontown ZIP code begins 991. Those first three digits identify the sectional center facility that processes mail for this part of Washington. Statewide that range covers 67 ZIP codes, so Uniontown accounts for 1% of it.

Every Washington ZIP prefix and the region it covers →

Area codes covering Uniontown

ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The code below serves the same ground Uniontown occupies.

509 Area code 509

Uniontown Washington area codes in full →

Where Uniontown's ZIP codes sit

Each point is one Uniontown ZIP code, plotted from its record coordinates.

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

Cities near Uniontown

The closest places to Uniontown with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Colton Washington ZIP codes	2.8 mi	1 ZIP code
Clarkston Washington ZIP codes	8.7 mi	1 ZIP code
Pullman Washington ZIP codes	14 mi	2 ZIP codes
Asotin Washington ZIP codes	14 mi	1 ZIP code
Albion Washington ZIP codes	19 mi	1 ZIP code
Pomeroy Washington ZIP codes	25 mi	1 ZIP code
Palouse Washington ZIP codes	26 mi	1 ZIP code
Colfax Washington ZIP codes	28 mi	1 ZIP code

Straight-line distance between place reference points, not driving distance.