Colfax, WA ZIP code
The ZIP code for Colfax, Washington is 99111. It is in Whitman County.
- Population in these ZIPs
- 4,038
- Avg. median income
- $73,400population-weighted
- Typical home value
- $318,100population-weighted
- Metro area
- Pullman, WA
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Colfax, WA ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 99111 | 4,038 | $73,393 | $318,100 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Colfax
Frequently asked questions
What is the ZIP code for Colfax, WA?
The ZIP code for Colfax, WA is 99111.
What county is Colfax, Washington in?
Colfax ZIP codes are in Whitman County.