In which county is ZIP code 98555 located?

ZIP 98555 is listed under Mason, WA.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 98555: Lilliwaup, WA

ZIP: 98555

County: Mason

Coordinates: 47.51280, -123.06310

ZIP Type: Standard

Time Zone: Pacific Time (PT)

Get a reliable snapshot of the Lilliwaup, WA postal area 98555. This page summarizes county, coordinates, and local facts to help with services and location research.

Primary City	Lilliwaup
ZIP Code	98555
County	Mason
State	WA
Latitude / Longitude	47.51280, -123.06310
ZIP Type	Standard
Time Zone	Pacific Time (PT)
Data Updated	2026-01-08

Maps & Useful Links

Open in Maps: Google Maps · OpenStreetMap

These links show the approximate center point for ZIP 98555 (not an exact boundary).

Geographic & Administrative Context

The geographic center of ZIP code 98555 is approximately 47.51280 (latitude) and -123.06310 (longitude). This location sits within Mason, contributing to regional planning across WA.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 98555 for mail delivery and general location reference in Mason, WA.

Some addresses near Lilliwaup may share this ZIP due to delivery routing and local service areas.

Related ZIP Codes (Nearby)

Explore other postal codes near Lilliwaup within WA.

Frequently Asked Questions

What is the primary city for ZIP code 98555?

The primary city for this ZIP code is Lilliwaup, located in WA.

In which county is 98555 located?

ZIP code 98555 is situated within Mason, WA.

What are the coordinates for 98555?

The approximate center point is 47.51280 (Latitude) and -123.06310 (Longitude).

Is ZIP code 98555 active?

This page lists ZIP 98555 as Listed based on the latest refresh date shown above.

Does ZIP 98555 cover multiple areas?

Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.

Methodology & Data Notes

How we build this page: We generate this page from a structured ZIP dataset and refresh key fields (city, county, and coordinates) during scheduled updates. Coordinates represent an approximate center point, not an official boundary map.
Sources: Public ZIP reference datasets and geographic coordinate references. If you use specific sources (e.g., USPS, Census), list them on your About/Methodology page.

Page updated: 2026-01-08