Washington ZIP Codes: Ranges, Prefixes and Major Cities

ZIP codes  |  June 30, 2026  |  2 min read

Washington uses 715 active ZIP codes, running from 98001 to 99403. This guide shows how those codes are grouped, which ones serve the state's largest cities and how to format them correctly.

ZIP code range and prefixes

Every Washington ZIP code starts with one of 14 three-digit prefixes. Each prefix points to a sectional center facility, the processing plant that sorts mail for a group of nearby post offices.

• 980
• 981
• 982
• 983
• 984
• 985
• 986
• 988
• 989
• 990
• 991
• 992
• 993
• 994

Types of ZIP codes in Washington

ZIP codes for major Washington cities

Olympia is the state capital. Larger cities have many ZIP codes because each code follows mail delivery routes, not city limits.

Sample addresses

These examples use real city and ZIP pairs with invented street lines, so they are safe for testing and documentation.

Tips for working with these ZIP codes

• Store ZIP codes as text, not numbers, so the format stays consistent across states with leading zeros.
• All of Washington is in the Pacific time zone, which keeps scheduling logic simple.
• A quick sanity check: a valid WA ZIP code begins with one of the prefixes listed above.
• City names in addresses are post office names. A suburb may share a ZIP code and city name with a nearby larger town.