ZIP Codes of Washington County, OR

Population & People
Population & People
Total Population
617,052
Household Income
Household Income
Median Income
$117,600
Housing
Housing
Total Housing Units
248,443
Business & Economy
Business & Economy
Total Businesses
16,365
Employment
Employment
Employment Rate
65.29%
Education
Education
Bachelor's Degree+
48.12%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 31 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:31 ZIP Codes (24 Standard, 5 PO Box, 2 Unique) [See All]
Area Codes:503 / 971
Timezone:Pacific (GMT -08:00)
Local Time:2:13:29 PM
Population:617,052 [See All]
FIPS:41067
CBSA:Portland-Vancouver-Hillsboro, OR-WA
Land Area:769 sq mi
Water Area:2 sq mi
Coordinates:45.5264, -122.9273
Quick Link:
https://www.zip-codes.com/county/or-washington.asp
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Top 3 most populous in Oregon
#2 of 38 counties in Oregon, with 617,052 residents.
Among Oregon's 5 wealthiest counties
#2 statewide, average median income $117,600.
Among Oregon's 5 densest counties
803 people per square mile (#2 statewide).
Among Oregon's 5 most-educated counties
48.1% with bachelor's+ (#3 statewide).
Striking education divide
Bachelor's share spans 21.9% to 69.5% — a 48-point gap.

Standout ZIPs in this County


Most Populous
Portland · 76,106 people
12.3% of county total
Highest Income
Portland · $161,570 median
1.4× county average
Largest Land Area
Gaston · 136.4 sq mi
Spans the most ground
Fastest Growth
Portland · 25.4% (10-yr)
60,679 → 76,106 residents
Most Educated
Portland · 69.5% bachelor's+
35,629 of 51,258 adults 25+

Things worth knowing about Washington County


617,052 residents live across 31 ZIPs covering 769 sq mi, served by 14 distinct USPS-recognized cities.

Population moved from 559,488 to 563,579 from 2014 to 2024 — a +0.7% change. 15 ZIPs gained residents, 6 lost.

The county's wealthiest ZIP 97229 (Portland, $161,570 median) and poorest ZIP 97005 (Beaverton, $78,239) are 4.0 miles apart — a 2.1× income gap across local geography.

Median home values vary 1.7× across this county — from $465,400 in 97113 (Cornelius) to $782,100 in 97229 (Portland).

Density varies 169× across the county — from 38 people/sq mi in 97119 (Gaston) to 6,486 in 97006 (Beaverton).

Educational attainment ranges from 21.9% bachelor's+ in 97113 (Cornelius) to 69.5% in 97229 (Portland) — the breadth of educational profiles across the area.

Within Oregon, this is the #2 most populous of 38 counties and ranks #2 for median household income with the #8 fastest decade growth .

Hosts 2 single-entity Unique ZIPs: 97079Shared Reshipper ; and 97077Tektronix .

Weighted by population, the typical household earns about $112,373 across the county — reflecting what a typical resident sees, not a simple ZIP average.

48.1% of adults age 25+ hold a bachelor's degree or higher (209,574 of 435,556 reporting). The most-educated ZIPs cluster around Portland.

24 Standard delivery, 5 PO Box only, 2 single-entity Unique ZIPs serve this county.

Stories about Washington County


Higher-education hub

2 ZIPs in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.

Portland
69.5%
76,106 residents
Portland
61.9%
25,869 residents

All ZIP Codes in Washington County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
97229PortlandStandard76,106$161,57019.625.4%
97124HillsboroStandard54,357$110,06744.010.1%
97223PortlandStandard50,527$106,75711.08.6%
97123HillsboroStandard48,410$109,98556.96.0%
97007BeavertonStandard47,895$123,53317.6-31.8%
97006BeavertonStandard46,463$104,7907.2-30.7%
97224PortlandStandard36,569$98,1259.012.4%
97116Forest GroveStandard29,800$92,61376.417.6%
97062TualatinStandard28,930$105,40714.15.3%
97008BeavertonStandard28,611$96,1165.3-3.5%
97005BeavertonStandard28,311$78,2395.410.9%
97140SherwoodStandard27,933$123,22844.014.1%
97003BeavertonStandard27,811$99,0724.6
97225PortlandStandard25,869$114,5986.7-1.0%
97078BeavertonStandard25,662$90,6066.3
97113CorneliusStandard16,268$96,85935.615.8%
97133North PlainsStandard5,416$133,16764.224.9%
97119GastonStandard5,233$115,515136.415.8%
97106BanksStandard4,855$104,25050.56.7%
97117Gales CreekStandard982$121,81856.3100.0%
97109BuxtonStandard730$150,89341.5-1.9%
97125ManningStandard248$250,0016.2181.8%
97144TimberStandard6649.7-48.4%
97129HillsboroStandard0.0
97291PortlandPO Box0.0
97281PortlandPO Box0.0
97298PortlandPO Box0.0
97079BeavertonUnique0.0
97075BeavertonPO Box0.0
97076BeavertonPO Box0.0
97077BeavertonUnique0.0

Adjacent & Nearby Counties