ZIP Code 99135

99135 is one of Washington's ZIP codes, delivering to addresses in Hartline, Grant County.

City: Hartline
County: Grant County
State: Washington
Prefix: 991xx

Where this code sits

99135 is part of the 991xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Hartline.

Hartline Washington ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 99135 delivers to without sharing its boundary.

509 Area code 509

ZIP codes nearest 99135

The ZIP codes whose reference points sit closest to 99135.
ZIP code	Distance	Delivers to
ZIP code 99115	9.0 mi	Coulee City, WA
ZIP code 98860	11 mi	Wilson Creek, WA
ZIP code 99103	13 mi	Almira, WA
ZIP code 98853	16 mi	Stratford, WA
ZIP code 99185	20 mi	Wilbur, WA
ZIP code 99123	21 mi	Electric City, WA
ZIP code 98832	21 mi	Marlin, WA
ZIP code 99133	23 mi	Grand Coulee, 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 99135, plotted from its record coordinates.

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

Scope ZIP code 99135. 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.