Washington County Map

Washington County Statistics & Summary

How Washington Counties and 5-Digit FIPS Codes Work

In U.S. Census Bureau TIGER/Line geography, Washington (WA) is assigned the 2-digit state Federal Information Processing Series (FIPS) code 53 and covers 66,457 square miles of land area across 39 counties in the Pacific Time (PT) zone (with Olympia as the state capital). Every county in the directory above carries a unique 5-digit GEOID formed by combining state prefix 53 with a 3-digit county code (ranging alphabetically from Adams County at 53001 to Yakima County at 53077).

Because U.S. Postal Service 5-digit ZIP Codes follow mail carrier delivery routes rather than local government borders, many postal addresses in Washington carry a neighboring city’s mailing name or sit inside a multi-county ZIP Code Tabulation Area (ZCTA). Property tax assessments, deed recording, circuit and county court venue, voter registration precincts, sheriff jurisdiction, and county sales tax rates in Washington are determined by the legal county boundary shown on the map above rather than the postal city name on an envelope.

Land area figures in square miles and internal centroid coordinates (INTPTLAT, INTPTLON) come directly from the U.S. Census Bureau’s current TIGERweb State_County benchmark, while 39 administrative seats and 39 verified official government websites are cross-referenced from Wikidata (CC0). Need a clean outline worksheet without county labels, or want to verify which Washington county a specific home or business address sits in? Open the Blank Map of Washington, run a street-segment check on Address to County Lookup, check multi-county postal overlap on ZIP Code to County Lookup, or browse all 50 states on the National U.S. County Map.

Adjacent State County Maps

Explore county maps and FIPS directories for states bordering Washington:

• Idaho Counties ID
• Oregon Counties OR