San Juan County, WA Demographics
San Juan County, WA is the 32nd most populous of 39 counties in Washington, with 17,738 residents across 174 square miles. That is about 102 people per square mile.
At the 2020 census
| Population | 17,738 |
|---|---|
| Land area | 174 sq mi |
| Density | 102 / sq mi |
Data: 2020 Census · American Community Survey 2024
How San Juan County compares to the US
We're computing this county's comparison table — check back shortly. Population, land area, and density above are already exact.
Central Location: San Juan County, WA
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around San Juan County, WA — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in San Juan County, WA
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Census Tract 9604 | 3,418 | 5.8 | 586 |
| Census Tract 9601.01 | 2,736 | 26.3 | 104 |
| Census Tract 9603.01 | 2,722 | 33.9 | 80 |
| Census Tract 9603.02 | 2,484 | 21.5 | 116 |
| Census Tract 9601.03 | 1,794 | 22.8 | 79 |
| Census Tract 9605.01 | 1,792 | 17.4 | 103 |
| Census Tract 9601.02 | 1,468 | 15.5 | 95 |
| Census Tract 9605.02 | 1,364 | 30.7 | 44 |
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About this page
This page shows demographics for a US county from the 2020 census and the American Community Survey: population, land area, density, urban share, and how the county compares to national averages for income, housing, age, and more.
Counties subdivide into census tracts, listed below with their populations. The drive-time and radius tables measure the population around the county's main population center.