Cosmopolis is a city in Grays Harbor County, Washington, home to about 2,202 people across 1.4 square miles. Its ZIP code is 98537, and parts of 98563 are in Cosmopolis too.
Homes sold for a median of $204 per square foot in the three months ending August 2026, a balanced market.
Mostly Cosmopolis
Mostly Montesano; part is in Cosmopolis
Each card is that ZIP code’s whole market, including any part outside Cosmopolis. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Cosmopolis’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Seattle–Tacoma International Airport (SEA)74 miles away |
|---|---|
| Closer regional airport | Olympia Regional Airport (OLM)39 miles away |
| Nearest city of 250,000+ | Seattle, WA79 miles away |
Straight-line distances from the center of Cosmopolis; 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.
Cosmopolis had 1,638 residents in the 2020 census, up 3% since 2000.
It’s the 302nd largest of 628 towns in Washington by population.
Grays Harbor County grew from 15,124 residents in 1900 to 75,636 in 2020.
Grays Harbor County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 69°F in summer, and winter lows average 37°F. About 85 inches of rain and melted snow fall in a typical year, with about 1 inches of snow.
Source: NOAA 1991–2020 climate normals, Aberdeen, WA weather station (5 miles away).
15,927 jobs at 1,558 businesses in Grays Harbor County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
5 doctors and other health care providers list an office in Cosmopolis.
Nearest hospitals
Providers with an office here
| Nurse practitioners and physician assistants | 1 |
|---|---|
| Mental health providers | 4 |
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
Pharmacies
Libraries
Theaters and performance venues
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 North River School District, Cosmopolis School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| North River SchoolCosmopolis | Pre-K–12 | 54 | Public | 18.1 mi |
| Cosmopolis Elementary SchoolCosmopolis | K–6 | 175 | Public | 2.4 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 Montesano, Brady and Aberdeen.
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.