Seattle-Tacoma-Bellevue, WA Metro Area Demographics
Seattle-Tacoma-Bellevue, WA Metro Area is the 15th most populous of 935 metro areas in the United States, with 4,018,603 residents across 5,870 square miles. That is about 685 people per square mile.
At the 2020 census
| Population | 4,018,603 |
|---|---|
| Land area | 5,870 sq mi |
| Density | 685 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Seattle-Tacoma-Bellevue, WA Metro Area compares to the US
We're computing this metro area's comparison table — check back shortly. Population, land area, and density above are already exact.
Central Location: Seattle-Tacoma-Bellevue, WA Metro Area
Measured from the metro area's main population center using 2020 census blocks.
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Counties in the Seattle-Tacoma-Bellevue, WA Metro Area area
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| King County, WA | 2,269,568 | 2,115.6 | 1,073 |
| Pierce County | 921,090 | 1,668.0 | 552 |
| Snohomish County, WA | 827,945 | 2,086.5 | 397 |
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About this page
This page shows demographics for a US metropolitan or micropolitan area from the 2020 census and the American Community Survey: population, land area, density, and how the area compares to national averages.
Metro areas are built from whole counties, listed below. Statistics aggregate the member counties' census tracts.