Colfax Washington ZIP Codes
Colfax holds a single ZIP code.
Every ZIP code in Colfax
| ZIP code | County |
|---|---|
| 99111 | 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Colfax codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Colfax. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.
How these codes cluster
Every Colfax 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 Colfax accounts for 1% of it.
Every Washington ZIP prefix and the region it covers →
Area codes covering Colfax
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 Colfax occupies.
Colfax Washington area codes in full →
Where Colfax's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Colfax
| City | Distance | ZIP codes |
|---|---|---|
| Albion Washington ZIP codes | 9.3 mi | 1 ZIP code |
| Garfield Washington ZIP codes | 9.8 mi | 1 ZIP code |
| Palouse Washington ZIP codes | 11 mi | 1 ZIP code |
| Pullman Washington ZIP codes | 15 mi | 2 ZIP codes |
| Oakesdale Washington ZIP codes | 15 mi | 1 ZIP code |
| Farmington Washington ZIP codes | 17 mi | 1 ZIP code |
| Endicott Washington ZIP codes | 18 mi | 1 ZIP code |
| Rosalia Washington ZIP codes | 22 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.