Cosmopolis city, Washington
Official LSAD Designation: Cosmopolis city • Census GEOID: 5314870
• Grays Harbor County
Demographics & Population Profile
Population and demographics for Cosmopolis city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 1,656 | — | 2025 | Census |
| Median Age | 39.2 yrs | ±7.2 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 762 | ±183 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).