What ZIP codes does Washington use for mail and package delivery?

Washington (WA) operates within the 5-digit ZIP prefix range 980xx–994xx. Mail routed to state capital Olympia and key regional centers such as Seattle, Spokane, Tacoma adheres to these official USPS boundaries.

Which telephone area codes are valid for Washington?

Washington is served by 6 active North American Numbering Plan (NANPA) area codes: 206, 253, 360, 425, 509, 564. Synthetic telephone numbers for Washington use those area codes with a 555 exchange, which is reserved for fictitious use.

How many counties are in Washington?

Washington is divided into 39 counties, including major administrative regions such as King, Pierce, Snohomish, Spokane. Generated street addresses use those names.

What postal formatting conventions and addressing quirks are unique to Washington?

Puget Sound directional sector patterns (e.g., Seattle's NW, N, NE, E, SE, S, SW directional sectors) requiring exact cardinal placement. Ferry-dependent island addresses (San Juan Islands, Bainbridge Island, Vashon Island) serviced through mainland Puget Sound distribution hubs. All addresses generated on this platform format secondary unit designators (Apt, Ste, Fl) and street suffixes according to USPS CASS standards.

Are the Washington addresses generated on this page real places?

No. All street numbers, recipient names, and telephone numbers generated for Washington are entirely synthetic and randomized for software testing, database seed scripts, and form validation. They use Washington ZIP codes from public USPS data and real city names, but they do not correspond to real individuals or private residences.

Random Washington Address Generator

These addresses are randomly generated for software testing. They are not real people’s details: the street number, unit and recipient name are invented, and no record is checked for deliverability.

Randomly generated Washington mailing addresses for software testing, form validation and staging data. Each record pairs a real Washington city with a ZIP prefix that serves it and the county that city sits in, then adds a street number, a secondary unit designator and a recipient name that are invented.

Official Washington Postal & Geographic Reference Specifications

Geographic & Postal Parameter	Official State Specification	Standardization Reference
Postal State Abbreviation	WA	USPS Publication 28 & ISO 3166-2:US
5-Digit ZIP Prefix Range	980xx–994xx	USPS prefix-to-state assignment
Administrative Jurisdictions	39 Total Counties	US Census Bureau regional boundaries
Active Area Codes (NANPA)	`206, 253, 360, 425, 509, 564` (6 total)	North American Numbering Plan Administrator
State Capital	Olympia	US Census Bureau
Primary Time Zone	Pacific Time (America/Los_Angeles, UTC-8 / UTC-7 DST)	IANA time zone database

Washington Postal Geography & Key Cities

ZIP codes and Sectional Center Facilities are derived from public USPS ZIP code data, area codes from the North American Numbering Plan, and county names from US Census Bureau records. Street numbers and recipient names are synthetic, and nothing is checked against an address-verification service.

Cities the generator draws from:

Seattle
Spokane
Tacoma
Vancouver
Bellevue
Olympia

Key Counties & Administrative Jurisdictions

County boundaries determine local sales tax jurisdictions in Washington:

King County
Pierce County
Snohomish County
Spokane County
Clark County

Washington Area Codes (WA)

Generated phone numbers use the area codes listed in the reference table above, paired with a 555 exchange so no number can reach a real line. Generate Washington phone numbers.

Postal Delivery Standards & Format Nuances in Washington

Puget Sound directional sector patterns (e.g., Seattle's NW, N, NE, E, SE, S, SW directional sectors) requiring exact cardinal placement.
Ferry-dependent island addresses (San Juan Islands, Bainbridge Island, Vashon Island) serviced through mainland Puget Sound distribution hubs.

Washington Address Examples in USPS Publication 28 Format

Residential Delivery Point:
100 Main St, Apt 4B Seattle, WA 98101-1204

Commercial / Multi-Unit Delivery Point:
Washington Logistics & Software Corp 500 Enterprise Way, Suite 300 Spokane, WA 99201-4810

Frequently Asked Questions about Washington Addresses

What ZIP codes does Washington use for mail and package delivery?: Washington (WA) operates within the 5-digit ZIP prefix range 980xx–994xx. Mail routed to state capital Olympia and key regional centers such as Seattle, Spokane, Tacoma adheres to these official USPS boundaries.
Which telephone area codes are valid for Washington?: Washington is served by 6 active North American Numbering Plan (NANPA) area codes: 206, 253, 360, 425, 509, 564. Synthetic telephone numbers for Washington use those area codes with a 555 exchange, which is reserved for fictitious use.
How many counties are in Washington?: Washington is divided into 39 counties, including major administrative regions such as King, Pierce, Snohomish, Spokane. Generated street addresses use those names.
What postal formatting conventions and addressing quirks are unique to Washington?: Puget Sound directional sector patterns (e.g., Seattle's NW, N, NE, E, SE, S, SW directional sectors) requiring exact cardinal placement. Ferry-dependent island addresses (San Juan Islands, Bainbridge Island, Vashon Island) serviced through mainland Puget Sound distribution hubs. All addresses generated on this platform format secondary unit designators (Apt, Ste, Fl) and street suffixes according to USPS CASS standards.
Are the Washington addresses generated on this page real places?: No. All street numbers, recipient names, and telephone numbers generated for Washington are entirely synthetic and randomized for software testing, database seed scripts, and form validation. They use Washington ZIP codes from public USPS data and real city names, but they do not correspond to real individuals or private residences.

Nearby & Bordering States

Explore test address generators for states sharing a geographic border with WA:

Washington ZIP Prefixes

The first three digits of a ZIP code place an address within Washington. These are the prefixes assigned to the state:

980xx, 981xx, 984xx, 985xx, 986xx, 992xx

Which processing facility sorts a given prefix is set by the current USPS labeling list L005 and changes as processing is consolidated, so it is not reproduced here. Look up a ZIP prefix to see its state and generate ZIP codes inside it.