ZIP code 99128
Where is ZIP code 99128?
Farmington, Washington
Whitman County · Standard ZIP code
ZIP code 99128 belongs to Farmington, Washington in Whitman County. 99128 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Pacific Time zone and uses area codes 208, 509 and 986. About 259 people live in the 99128 area, where the median household income is $58,942. The closest ZIP codes are 99104 (Belmont, 4.8 mi west), 99130 (Garfield, 7.2 mi southwest) and 83824 (Desmet, 8 mi east).
| ZIP code | 99128 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Farmington |
| State | Washington (WA) |
| County | Whitman County |
| Time zone | Pacific Time · now |
| Area codes | 208, 509, 986 |
| Coordinates | 47.0847, -117.0763 map |
| 3-digit prefix | 991 |
Population and income in 99128
| Population | 259 · lower than 89% of Washington ZIP codes |
|---|---|
| People per square mile | 4 · lower than 89% of Washington ZIP codes |
| Median age | 57.1 years · higher than 87% of Washington ZIP codes |
| Men / women | 56% / 44% |
| Median household income | $58,942 · lower than 87% of Washington ZIP codes |
| Income per person | $38,137 |
| Below the poverty line | 18% |
| Bachelor’s degree or higher | 26% of adults 25+ |
| Median home value | $363,500 · lower than 70% of Washington ZIP codes |
| Median rent | $1,089 a month |
| Housing units | 158 |
| Households | 125 (2.07 people on average) |
| Owners / renters | 76% / 24% |
| Land area | 59.49 sq mi |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 99128. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 99128
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 99104 | Belmont, WA | 4.8 mi W | Standard |
| 99130 | Garfield, WA | 7.2 mi SW | Standard |
| 83824 | Desmet, ID | 8 mi E | Standard |
| 99158 | Oakesdale, WA | 8.4 mi W | Standard |
| 99033 | Tekoa, WA | 9.8 mi N | Standard |
| 83870 | Tensed, ID | 10.1 mi NE | Standard |
| 99161 | Palouse, WA | 12.2 mi S | Standard |
| 83855 | Potlatch, ID | 12.3 mi SE | Standard |
| 99174 | Steptoe, WA | 14.2 mi W | PO Box only |
| 99176 | Thornton, WA | 14.9 mi W | Standard |
| 99018 | Latah, WA | 15.2 mi N | Standard |
| 83872 | Viola, ID | 16.4 mi S | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 99128 or measure the distance to another ZIP code.
How to address mail to 99128
123 MAIN ST
FARMINGTON WA 99128
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (99128-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 99128?
- 99128 is a Farmington, Washington ZIP code.
- What county is 99128 in?
- ZIP code 99128 is in Whitman County, Washington.
- What time zone is ZIP code 99128 in?
- 99128 is in the Pacific Time zone (America/Los_Angeles).
- What area code is 99128?
- Phone numbers in ZIP code 99128 use area codes 208, 509 and 986.
- What is the population of ZIP code 99128?
- About 259 people live in ZIP code 99128, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 99128?
- The median household income in 99128 is $58,942 a year, lower than 87% of Washington ZIP codes.
- What ZIP codes are near 99128?
- The nearest ZIP codes to 99128 are 99104 (Belmont, 4.8 miles), 99130 (Garfield, 7.2 miles), 83824 (Desmet, 8 miles) and 99158 (Oakesdale, 8.4 miles).