ZIP code 99128: Farmington, WA
99128 is a ZIP code in Farmington, Washington, mainly in Whitman County, part of the Pullman, WA micro area. About 259 people live here.
- Population
- 259
- Median household income
- $58,942
- Typical home value
- $300,300-0.3% in 12 months
- Median rent
- $1,089gross, per month
- Median age
- 57.1
- Homeowners
- 76%of occupied homes
Shaded: ZIP code 99128's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 99128 details
| City | Farmington |
|---|---|
| State | Washington |
| County | Whitman County (also partly Latah County) |
| Metro area | Pullman, WA |
| Time zone | Pacific Time (UTC−8), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 59.5 sq mi |
| Population density | 4 people per sq mi |
| Bachelor's degree or higher | 25.5% of adults 25+ |
| Average commute | 20.8 minutes |
| Center coordinates | 47.09795, -117.08133 |
Median rent in 99128 by bedrooms
| Size | Median gross rent |
|---|---|
| 2 bedrooms | $775/mo |
| 4 bedrooms | $1,286/mo |
Gross rent includes utilities paid by the tenant. ACS 2020–2024; sizes with too few rentals to estimate are left out.
ZIP codes near 99128
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 99104 | Belmont, WA | 4.7 mi | — |
| 83824 | Desmet, ID | 6.5 mi | 452 |
| 99158 | Oakesdale, WA | 7.8 mi | 561 |
| 99130 | Garfield, WA | 8.4 mi | 693 |
| 99033 | Tekoa, WA | 9.2 mi | 832 |
| 83870 | Tensed, ID | 11.1 mi | 421 |
| 83855 | Potlatch, ID | 11.6 mi | 2,260 |
| 99161 | Palouse, WA | 13.8 mi | 1,435 |
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
Buying a home in 99128?
A typical home in ZIP code 99128 is worth about $300,300 (Zillow Home Value Index). The median household here earns $58,942 a year. See what buying here would cost per month, with Washington average taxes and insurance filled in.
Monthly payment for a $300,300 homeWhat can a $58,942 income afford?Rental property numbers
About ZIP code 99128
What city is ZIP code 99128?
ZIP code 99128 is in Farmington, WA, in Whitman County.
What county is ZIP code 99128 in?
99128 is mainly in Whitman County, Washington, and partly in Latah County.
What is the population of ZIP code 99128?
About 259 people live in ZIP code 99128, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 99128 in?
99128 is in Pacific Time (UTC−8). It observes daylight saving time.