| ZIP Codes: | 4 ZIP Codes (3 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Code: | 509 |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 2:14:17 PM |
| Population: | 8,331 [See All] |
| FIPS: | 53059 |
| CBSA: | Portland-Vancouver-Hillsboro, OR-WA |
| Land Area: | 474 sq mi |
| Water Area: | 12 sq mi |
| Coordinates: | 45.7421, -121.8914 |
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8,331 residents live across 4 ZIPs covering 474 sq mi, served by 4 distinct USPS-recognized cities.
Population moved from 7,434 to 8,331 from 2014 to 2024 — a +12.1% change. 4 ZIPs gained residents, 0 lost.
The county's wealthiest ZIP 98639 (North Bonneville, $100,417 median) and poorest ZIP 98610 (Carson, $72,773) are 15.8 miles apart — a 1.4× income gap across local geography.
Median home values vary 1.6× across this county — from $445,900 in 98639 (North Bonneville) to $730,700 in 98651 (Underwood).
Density varies 10× across the county — from 9 people/sq mi in 98610 (Carson) to 91 in 98639 (North Bonneville).
Educational attainment ranges from 16.6% bachelor's+ in 98610 (Carson) to 36.9% in 98651 (Underwood) — the breadth of educational profiles across the area.
Within Washington, this is the #35 most populous of 39 counties and ranks #11 for median household income with the #20 fastest decade growth .
Weighted by population, the typical household earns about $88,329 across the county — reflecting what a typical resident sees, not a simple ZIP average.
27.7% of adults age 25+ hold a bachelor's degree or higher (1,805 of 6,519 reporting).
3 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.