Grand Coulee is a city in Douglas County, Washington, home to about 913 people across 1.3 square miles. Its ZIP code is 99133, and parts of 99116 are in Grand Coulee too.
Homes sold for a median of $265 per square foot in the three months ending August 2026, a buyer’s market.
Mostly Grand Coulee
Mostly Coulee Dam; part is in Grand Coulee
Each card is that ZIP code’s whole market, including any part outside Grand Coulee. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Grand Coulee’s story and what everyday life there is like, for people thinking about moving in.
Are you a local agent who knows Grand Coulee well? Agents who advertise here will be able to write the guide. Advertise on OfferBacked
| Nearest major airport | Spokane International Airport (GEG)71 miles away |
|---|---|
| Nearest city of 250,000+ | Seattle, WA157 miles away |
Straight-line distances from the center of Grand Coulee; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Grand Coulee had 972 residents in the 2020 census, up 8% since 2000.
It’s the 401st largest of 628 towns in Washington by population.
Douglas County grew from 4,926 residents in 1900 to 42,938 in 2020.
Douglas County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 88°F in summer, and winter lows average 23°F. About 11.2 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Coulee Dam 1 Sw, WA weather station (about a mile away).
8,674 jobs at 854 businesses in Douglas County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
37 doctors and other health care providers list an office in Grand Coulee.
Nearest hospitals
Providers with an office here
| Primary care doctors | 6 |
|---|---|
| Specialist doctors | 1 |
| Dentists | 1 |
| Nurse practitioners and physician assistants | 13 |
| Mental health providers | 7 |
| Physical and occupational therapists | 6 |
| Optometrists | 2 |
| Chiropractors | 1 |
| Pharmacies | 2 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (1 nearby)
Grocery stores (1 nearby)
Libraries (1 nearby)
Museums
Counts are within about 1 mile of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Grand Coulee Dam School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Lake Roosevelt Alternative SchoolGrand Coulee | 9–12 | 33 | Alternative Education | 0.9 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Coulee Dam.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.