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zipcodes.pro — CITY/WA/GRAND-COULEE

Grand Coulee ZIP code, Washington

The ZIP code for Grand Coulee, WA is 99133, and its area code is 509.

USPS city name
1 ZIP code
Overlapping the city
1 more
Population
913
Area code
509

NANPA lists no telephone rate centre for Grand Coulee itself, so these are the area codes of the nearest one, Coulee Dam (9.3 miles). A town on an area-code boundary can differ from its neighbour.

Mail addressed to Grand Coulee uses the ZIP code above. 1 more ZIP code covers part of the city but is addressed as somewhere else; they are listed separately below.

Grand Coulee in numbers

About 913 people live in Grand Coulee, in 425 households. The median household income is $64,250 a year, 35% below the Washington median of $98,141 (US: $80,734). The median owner-occupied home is valued at $222,000 (61% below the Washington median), and median gross rent is $591 a month. The median age is 47.2; 15.5% of adults 25 and over hold a bachelor's degree or higher (39.6% across Washington); the average commute takes 15 minutes.

Population913Grand Coulee913
Households425Grand Coulee425
Median age47.2Grand Coulee47.2Washington38.3US 38.9
Median household income$64,250Grand Coulee$64,250Washington$98,141US $80,734
Median home value$222,000Grand Coulee$222,000Washington$564,600US $332,700
Median gross rent$591Grand Coulee$591Washington$1,760US $1,413
Bachelor's degree or higher15.5%Grand Coulee15.5%Washington39.6%US 35.7%
Mean commute15.3 minGrand Coulee15.3 minWashington26.6 minUS 26.4 min
Population density727 / sq miGrand Coulee727 / sq mi

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

ZIP codes addressed as Grand Coulee

ZIP codes with the USPS city name Grand Coulee
ZIP City Type Population Median income Median home
99133 Grand Coulee , WA Standard 1,115 $68,854 $229,900

Other ZIP codes overlapping Grand Coulee

These ZIP codes cover part of Grand Coulee but are addressed as somewhere else.

ZIP codes overlapping Grand Coulee
ZIP City Type Population Median income Median home
99116 Coulee Dam , WA Standard 1,786 $65,946 $238,900

Map of Grand Coulee ZIP codes

99133

The ZIP codes of Grand Coulee, 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 Grand Coulee

The nearest larger towns are Coulee Dam (1,595 people, 2.4 mi), Bridgeport (1,792 people, 31 mi) and Brewster (1,653 people, 37 mi).

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

Cite this page

zipcodes.pro. “Grand Coulee, WA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/wa/grand-coulee

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