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zipcodes.pro — CITY/WA/ST-JOHN

St. John ZIP code, Washington

The ZIP code for St. John, WA is 99171, and its area code is 509.

USPS city name
1 ZIP code
Population
607
Area code
509

Also written Saint John, the spelling the Postal Service uses.

St. John in numbers

About 607 people live in St. John, in 275 households. The median household income is $46,250 a year, 53% below the Washington median of $98,141 (US: $80,734). The median owner-occupied home is valued at $208,300 (63% below the Washington median), and median gross rent is $888 a month. The median age is 57.3; 19.9% of adults 25 and over hold a bachelor's degree or higher (39.6% across Washington); the average commute takes 19 minutes.

Population607St. John607
Households275St. John275
Median age57.3St. John57.3Washington38.3US 38.9
Median household income$46,250St. John$46,250Washington$98,141US $80,734
Median home value$208,300St. John$208,300Washington$564,600US $332,700
Median gross rent$888St. John$888Washington$1,760US $1,413
Bachelor's degree or higher19.9%St. John19.9%Washington39.6%US 35.7%
Mean commute18.8 minSt. John18.8 minWashington26.6 minUS 26.4 min
Population density905 / sq miSt. John905 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place St. John town. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Saint John

ZIP codes with the USPS city name Saint John
ZIP City Type Population Median income Median home
99171 Saint John , WA Standard 895 $53,333 $220,500

Map of St. John ZIP codes

99171

The ZIP codes of St. John, WA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near St. John

The nearest larger towns are Colfax (2,708 people, 18 mi), Tekoa (690 people, 26 mi) and Palouse (1,147 people, 27 mi).

Towns near St. John
TownPopulationDistance
Colfax 2,708 17.9 mi
Cheney 12,804 27.6 mi

More nearby: every ZIP code in Whitman County · Washington ZIP codes

Cite this page

zipcodes.pro. “St. John, WA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/wa/st-john

Underlying data is public domain or openly licensed — sources, vintages and licences.