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Zip Code 99115 — Coulee City, WA

ZIP Code 99115 is associated with Coulee City, WA, in Douglas County. The listed population estimate is 1,369; estimated density is 1.3 people per square mile. Among records with population estimates, it ranks #6 of 9 in Douglas County and #396 of 597 in WA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (47.673260, -119.389650)

Data MetricLocal Statistic
Postal / Zip Code99115
Primary CityCoulee City
State / ProvinceWA
CountyDouglas
Total Population1,369
Population Density1.3 people/sq mi
TimezoneAmerica/Los_Angeles

How 99115 Compares

MetricZIP 99115Douglas County recordsWA records
Population estimate1,36945,846 (sum)7,816,021 (sum)
Population Density1.3 /sq mi----
County population rank#6 of 9----
State population rank#396 of 597----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in WA

ZIP CodeCityDistancePopulation estimate
ZIP 99135Hartline13.7 mi395
ZIP 98830Mansfield16.0 mi557
ZIP 98853Stratford16.5 mi6
ZIP 98851Soap Lake17.6 mi4,437
ZIP 98860Wilson Creek18.8 mi277

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →