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Adams County, WA Demographics

Adams County, WA is the 31st most populous of 39 counties in Washington, with 20,613 residents across 1,925 square miles. That is about 11 people per square mile.

At the 2020 census

Population 20,613
Land area 1,925 sq mi
Density 11 / sq mi

Data: 2020 Census · American Community Survey 2024

How Adams 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: Adams County, WA

Measured from the county's main population center using 2020 census blocks.

We're computing the drive-time and radius areas around Adams County, WA — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.

Census tracts in Adams County, WA

Name Population Sq mi Per sq mi
Census Tract 9505 5,946 4.8 1,243
Census Tract 9503.03 3,067 45.8 67
Census Tract 9504 2,859 1.4 2,080
Census Tract 9503.02 2,599 67.4 39
Census Tract 9501 2,579 622.6 4
Census Tract 9502 1,804 1,016.3 2
Census Tract 9503.01 1,759 166.8 11

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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.

Read how BlockAtlas computes population within an area →