In which county is ZIP code 98240 located?

ZIP 98240 is listed under Whatcom County, WA.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 98240: Custer, WA

ZIP: 98240

County: Whatcom County

Coordinates: 48.93740, -122.62260

ZIP Type: Standard

Time Zone: Pacific Time (PT)

Get a reliable snapshot of the Custer, WA postal area 98240. This page summarizes county, coordinates, and local facts to help with services and location research.

Primary City	Custer
ZIP Code	98240
County	Whatcom County
State	WA
Latitude / Longitude	48.93740, -122.62260
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 98240 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 98240 are listed as 48.93740 / -122.62260, useful for GPS and service checks in and around Custer, WA.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 98240 for mail delivery and general location reference in Whatcom County, WA.

Coverage may include nearby neighborhoods and adjacent unincorporated areas commonly associated with Custer.

Related ZIP Codes (Nearby)

Explore other postal codes near Custer within WA.

Frequently Asked Questions

What is the primary city for ZIP code 98240?

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

In which county is 98240 located?

ZIP code 98240 is situated within Whatcom County, WA.

What are the coordinates for 98240?

The approximate center point is 48.93740 (Latitude) and -122.62260 (Longitude).

Is ZIP code 98240 active?

This page lists ZIP 98240 as Listed based on the latest refresh date shown above.

Does ZIP 98240 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