Cosmopolis is a city in Grays Harbor County, Washington, United States. The population was 1,638 at the 2020 census. It lies on the Chehalis River and U.S. Route 101, immediately southeast of Aberdeen. Cosmopolis historically had an economy that centered around its pulp mill, which closed in 2006.

Official town website ↗

From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)

Town numbers

ZIP code98537

Area code360

Living in Cosmopolis

Housing in Cosmopolis

$327K▼ 0.6% in a year Typical home value · Zillow

The typical Cosmopolis home is worth about $327,000, down 0.6% in a year, 45% below the Washington typical home.

Only 2 sales in April 2026, too few for a market read. The typical value is the steadier guide.

Zillow Home Value Index · Redfin Data CenterHousing market →

Work & commute in Cosmopolis

Full picture →

Most working residents leave Cosmopolis for work: only 1% work in town. The top destinations are Aberdeen (25%), Hoquiam (6%) and Lacey (4%). Half commute less than 25 miles.

Aberdeen

25%

Hoquiam

Lacey

Olympia

1%Work in townlive and work in Cosmopolis 25 miWhere do people commute?the commute map 150Jobs based herea commuter town

Census LEHD 2023 · ACSWork & commute in Cosmopolis →

Health in Cosmopolis

C⁺

Health Grade C+

Healthier than 41% of U.S. towns on seven CDC estimates.

Compared with Washington

1better than WA·16worse

of 26 measures CDC estimates. The other 9 are too close to call.

Conditions 9▼ 3 close Habits 3▼ 1 close Care 1▲ 1▼ 5 close Mind 3▼ 0 close

BetterToo close to callWorse

What stands out

74.5%More adults treating high blood pressureWA 70.7% · better 7.9%More adults with COPDWA 5.1% · worse

Care nearby

Grays Harbor Community HospitalAberdeen · 17.4 mi · ER

Sea Mar Chc - Aberdeen Sumner Ave.Aberdeen · 3.4 mi · sliding-scale fees

Primary careShortage · county-wide

DentalShortage · county-wide

Mental healthShortage · county-wide

CDC PLACES 2025 · modeled estimates for adults · CDC's estimate for Cosmopolis · CMS · HRSAHealth in Cosmopolis →

Natural hazards in Cosmopolis

Very high

Expected storm and flood damage is higher than in 99% of U.S. communities.

🏚️ Earthquakes🌊 Coastal flooding🌊 Inland flooding

5Does Cosmopolis flood?paid flood claims since 1986 8Disasters that paid out herefederal disasters sent FEMA money to Cosmopolis

FEMA National Risk Index December 2025 · OpenFEMANatural hazards in Cosmopolis →

Climate in Cosmopolis

Full climate →

Cosmopolis has mild winters and cool summers, with plenty of rain. A typical July afternoon reaches 69°, a January night drops to 36°, and snow is almost unheard of.

48° / 36°Winter

57° / 40°Spring

68° / 51°Summer

60° / 43°Fall

How much snow does Cosmopolis get?Almost none.Rain & snow →When is the first frost?Around Nov 15, with the last in spring around Mar 29.Frost dates →Is it warmer than it used to be?+1.3° vs. the 20th century.Then & now →

NOAA U.S. Climate Normals, 1991–2020Climate in Cosmopolis →

Schools in Cosmopolis

All Cosmopolis schools →

B⁻

School Grade B-

The public schools Cosmopolis’s kids attend outperform 53% of Washington’s districts on state tests. Among towns with similar incomes, they sit near the middle.

DistrictCosmopolis School DistrictSchools1

Cosmopolis Elementary SchoolElementary · Grades K–6 · 175 students

School data from the U.S. Department of Education (NCES, EDFacts). The School Grade is our own summary of state test results, graded within WA. Ratings are from neighbors.