Columbia County, Washington

Browse all ZIP codes in Columbia County, Washington. Each ZIP code page includes population, median household income, and a map of the area.

County Statistics

Total Population 3,769
Median Household Income $60,427
Median Age 52.4
Unemployment Rate 3.7%
Poverty Rate 9.6%
ZIP Codes 2

Largest ZIP Codes in Columbia County

ZIP Code City Population Median Income
99328Dayton3,669$69,355
99359Starbuck100$51,500

Demographics

Race & Ethnicity

Gender

Education Level (adults 25+)

All ZIP Codes in Columbia County