There is one unique ZIP code in Farmington, Washington and it is 99128. Area code: 509.
1
ZIP codes
59.49
sq mi land
0.00
sq mi water
509
area code
Farmington, WA ZIP code map
About Farmington, WA
Farmington is a small rural community located in Whitman County in the Palouse region of eastern Washington State. Served by a single ZIP code, 99128, this quiet agricultural town embodies the unhurried pace and close-knit spirit of small-town Washington. Residents enjoy a lifestyle deeply connected to the surrounding farmland, with the rolling wheat fields of the Palouse forming the backdrop to everyday life.
Location & geography
Farmington sits in the southeastern corner of Washington State within Whitman County, positioned among the gently rolling hills that define the famous Palouse agricultural region. Nearby communities include Rosalia to the northwest, Tekoa to the southeast, Oakesdale to the west, and Spokane to the north, making Farmington part of a broader network of small Palouse towns. The city encompasses 59.49 square miles of land and has no water area whatsoever, reflecting the predominantly dryland farming landscape of the region.
Community & economy
Farmington is a tight-knit agricultural community where farming, particularly wheat and grain production, forms the backbone of the local economy and daily life. Residents tend to know their neighbors well, and community events, local churches, and school activities serve as the social anchors of the town. The pace of life here is quiet and deliberate, drawing people who appreciate open spaces, rural landscapes, and a genuine sense of community.
Transportation
Farmington is accessible via Washington State Route 27, which runs through the Palouse region and connects the town to larger communities to the north and south. For air travel, residents typically rely on Spokane International Airport, located in Spokane roughly 40 to 45 miles to the northwest, which offers regional and national flights. There is no local public transit service in Farmington, so personal vehicles are the primary means of getting around for daily needs.
History
Farmington was established in the late 19th century as settlers moved into the fertile Palouse region of eastern Washington, drawn by the promise of rich agricultural land ideal for wheat farming. The town grew around the farming community it served, and the arrival of the railroad through the region in the late 1800s helped connect small Palouse towns like Farmington to larger markets. Agriculture has remained the defining industry of the community throughout its history, and the town retains much of its original small-scale rural character to this day.
Did you know?
One surprising aspect of Farmington is that despite covering nearly 59.49 square miles of land, the community remains one of the smallest and most sparsely populated incorporated places in Whitman County. The complete absence of any water area — 0.00 square miles — underscores just how thoroughly this is a dryland farming landscape, where the land itself, not rivers or lakes, defines the character of the place.
