ZIP Code 98511

98511 is one of Washington's ZIP codes, delivering to addresses in Tumwater, Thurston County.

City: Tumwater
County: Thurston County
State: Washington
Prefix: 985xx

Where this code sits

98511 is part of the 985xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Tumwater.

Tumwater Washington ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 98511 delivers to without sharing its boundary.

ZIP codes nearest 98511

The ZIP codes whose reference points sit closest to 98511.
ZIP code	Distance	Delivers to
ZIP code 98512	0.9 mi	Olympia, WA
ZIP code 98556	4.1 mi	Littlerock, WA
ZIP code 98505	7.6 mi	Olympia, WA
ZIP code 98501	8.0 mi	Olympia, WA
ZIP code 98504	8.0 mi	Olympia, WA
ZIP code 98507	8.0 mi	Olympia, WA
ZIP code 98508	8.0 mi	Olympia, WA
ZIP code 98599	8.0 mi	Olympia, WA

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 98511, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 98511. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.