ZIP Code 99324

99324 is one of Washington's ZIP codes, delivering to addresses in College Place, Walla Walla County.

City: College Place
County: Walla Walla County
State: Washington
Prefix: 993xx

Where this code sits

99324 is part of the 993xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to College Place.

College Place Washington ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 99324 delivers to without sharing its boundary.

509 Area code 509

ZIP codes nearest 99324

The ZIP codes whose reference points sit closest to 99324.
ZIP code	Distance	Delivers to
ZIP code 99362	3.9 mi	Walla Walla, WA
ZIP code 97862	6.9 mi	Milton Freewater, OR
ZIP code 99360	13 mi	Touchet, WA
ZIP code 99329	14 mi	Dixie, WA
ZIP code 97813	16 mi	Athena, OR
ZIP code 97886	17 mi	Weston, OR
ZIP code 97835	20 mi	Helix, OR
ZIP code 99361	20 mi	Waitsburg, 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 99324, plotted from its record coordinates.

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

Scope ZIP code 99324. 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.