ZIP Code 98537
About Cosmopolis
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.
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Area Profile
US Census (ACS 5-year · Gazetteer)
2,902
population
$74,421
median household income
18
people / sq mi
$301,400
median home value
$947
median gross rent
41.8
median age
1,166
housing units
1,031
households
162.8
land area (sq mi)