ZIP codes
2
Columbia County, WA Demographics & ZIP Codes
Columbia County, Washington demographics and median household income by ZIP code — 2 ZIP codes — population 3,702 — avg. income $60,867 — avg. home value $192,350. Compare income, housing, and ZIP-level data on US5.
Population
3,702
Median household income (avg.)
$60,867
81% of U.S. median
Average home value
$192,350
55% of U.S. median
Average rent
$1,156
99% of U.S. median
Columbia County demographics
Columbia County, Washington covers 2 ZIP codes, with a combined ZIP-area population of about 3,702.
Median household income in Columbia County
The average median household income across ZIP codes in Columbia County, Washington is about $60,867 — about 30% below the WA ZIP average ($87,083), and about 19% below the U.S. median ($75,149).
Among ZIPs with income data, 99328 (Dayton) is near the top at about $72,233, while 99359 (Starbuck) is near the bottom at about $49,500.
Housing in Columbia County
For housing in Columbia County, Washington, the average median home value is about $192,350 and the average median rent is about $1,156.
The most populous ZIP is 99328 (Dayton) with about 3,595 residents. Use the table below to compare ZIP codes across the county.
ZIP codes in Columbia County
Sort by population, income, or home value. Click a column header to toggle ascending / descending.
| ZIP | City | County | State | Population ↓ | Income | Home value |
|---|---|---|---|---|---|---|
| 99328 | Dayton | Columbia County | WA | 3,595 | $72,233 | $252,200 |
| 99359 | Starbuck | Columbia County | WA | 107 | $49,500 | $132,500 |
Frequently asked questions
What are the demographics of Columbia County?
Columbia County, Washington has a combined ZIP-area population of about 3,702 across 2 ZIP codes. Browse the ZIP table for population, income, and housing by code.
What is the median household income in Columbia County?
The average median household income across ZIP codes in Columbia County, Washington is about $60,867, about 30% below the state ZIP average ($87,083), and about 19% below the U.S. median ($75,149). Average median home value is about $192,350. Among ZIPs with data, 99328 (Dayton) is near the top ($72,233) and 99359 (Starbuck) is near the bottom ($49,500).
How many ZIP codes are in Columbia County?
Columbia County, Washington includes 2 ZIP codes on US5. Each row links to demographics, median income, and housing for that code.
Where can I find ZIP code demographics for Columbia County?
This page lists ZIP codes in Columbia County, Washington with population, median household income, and home value. Select a ZIP for a full demographics profile.