ZIP Codes of Wahkiakum County, WA

Population & People
Population & People
Total Population
4,484
Household Income
Household Income
Median Income
$75,416
Housing
Housing
Total Housing Units
2,139
Business & Economy
Business & Economy
Total Businesses
94
Employment
Employment
Employment Rate
40.64%
Education
Education
Bachelor's Degree+
22.16%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 4 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:4 ZIP Codes (4 Standard, 0 PO Box, 0 Unique) [See All]
Area Codes:360 / 564
Timezone:Pacific (GMT -08:00)
Local Time:2:14:17 PM
Population:4,484 [See All]
FIPS:53069
Land Area:327 sq mi
Water Area:24 sq mi
Coordinates:46.3119, -123.4860
Quick Link:
https://www.zip-codes.com/county/wa-wahkiakum.asp
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Among America's 50 most Hispanic-majority counties
0.6% Hispanic or Latino — #20 nationwide.
Among Washington's 5 fastest-growing counties
#4 statewide, up 16.7% from 2014 to 2024.
Among Washington's 5 oldest counties
Median age 52.2.

Standout ZIPs in this County


Most Populous
Cathlamet · 3,366 people
75.1% of county total
Highest Income
Grays River · $91,250 median
1.2× county average
Largest Land Area
Skamokawa · 144.3 sq mi
Spans the most ground
Fastest Growth
Cathlamet · 28.6% (10-yr)
2,618 → 3,366 residents
Most Educated
Cathlamet · 21.1% bachelor's+
548 of 2,593 adults 25+

Things worth knowing about Wahkiakum County


4,484 residents live across 4 ZIPs covering 327 sq mi, served by 4 distinct USPS-recognized cities.

Population moved from 3,841 to 4,484 from 2014 to 2024 — a +16.7% change. 3 ZIPs gained residents, 1 lost.

The county's wealthiest ZIP 98621 (Grays River, $91,250 median) and poorest ZIP 98612 (Cathlamet, $59,583) are 13.2 miles apart — a 1.5× income gap across local geography.

Median home values vary 1.8× across this county — from $237,100 in 98643 (Rosburg) to $429,600 in 98612 (Cathlamet).

Density varies 11× across the county — from 2 people/sq mi in 98647 (Skamokawa) to 28 in 98612 (Cathlamet).

Educational attainment ranges from 15.2% bachelor's+ in 98647 (Skamokawa) to 37.3% in 98621 (Grays River) — the breadth of educational profiles across the area.

Within Washington, this is the #37 most populous of 39 counties and ranks #21 for median household income with the #4 fastest decade growth .

Weighted by population, the typical household earns about $61,317 across the county — reflecting what a typical resident sees, not a simple ZIP average.

22.2% of adults age 25+ hold a bachelor's degree or higher (760 of 3,429 reporting).

4 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Wahkiakum County


Single-ZIP anchor

One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.

Cathlamet

All ZIP Codes in Wahkiakum County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
98612CathlametStandard3,366$59,583120.728.6%
98643RosburgStandard57140.931.0%
98647SkamokawaStandard352144.342.5%
98621Grays RiverStandard195$91,25021.1-63.9%

Adjacent & Nearby Counties