County ProfileWA
Columbia County
Population: 3,952 · 2 ZIP codes
Demographics
Source: U.S. Census Bureau (ACS/Decennial). Estimates vary by year.
People
Total population
3,952
People
Median age
49.6
Housing
Total households
1,862
Income
Median household income
$71,810
Housing
Total housing units
2,217
Employment
Employment rate
52.7%
Education
Bachelor’s degree or higher
24.9%
Healthcare
Insured population
92.2%
County details
Local time 00:17:08(PT)| Name | Columbia |
|---|---|
| Total ZIP codes | 2total |
| ZIP codes (by type) | 1 Standard1 PO Box |
| Area code | 509 |
| Timezone | Pacific Time (PT) |
| Coordinates | 46.2928505, -117.9116345 |
| Land area | 868.6 sq miles(2,249.6 km²) |
Map of Columbia county, Washington with ZIP codes
Cities and Communities in Columbia County
Compare the largest cities in Columbia County by population, median income, and growth. Use the table below to analyze key demographic shifts across the region.
— Data unavailable or suppressed by the U.S. Census Bureau for areas with small sample sizes to protect individual privacy.
ZIP Codes in Columbia County
Review the most populated postal areas across Columbia County. Use the ranking below to compare resident density and demographic scales between the county's major zones.
Data Sources & Citations
The geographic and demographic information presented on this site is compiled from publicly available, authoritative sources, including:
- United States Census BureauDemographic, population, housing, and socioeconomic data sourced from Census Bureau datasets, including the Decennial Census and the American Community Survey (ACS).Census Data
- United States Postal Service (USPS)ZIP code classifications, delivery types, and postal designations used for reference purposes. USPS ZIP codes are intended for mail delivery and may not always align exactly with Census geographic boundaries.USPS