Columbia County, WA Demographics
Columbia County, WA is the 38th most populous of 39 counties in Washington, with 3,952 residents across 869 square miles. That is about 5 people per square mile.
At the 2020 census
| Population | 3,952 |
|---|---|
| Land area | 869 sq mi |
| Density | 5 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Columbia 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: Columbia County, WA
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Columbia County, WA — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in Columbia County, WA
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Census Tract 9602 | 3,952 | 868.6 | 5 |
Related places
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.